“Walk-in greenhouse vs. tiny greenhouse, which is better for starting plants?” is certainly on your mind if you’re considering purchasing a greenhouse. Ultimately, which choice is ideal for you depends on what you’re looking for.
Consider a walk-in greenhouse if you have a large backyard or if the expense isn’t an issue for you. If you’re just getting into greenhouse gardening or don’t have the space for a walk-in greenhouse, tiny greenhouses are a terrific option.
What is a Good Size for a Greenhouse?
A greenhouse can be divided into three primary categories: small, medium, and large.
The most common size for a tiny greenhouse is 6 ft by 8 ft, however there is no set standard. There’s a lot of room to move around and add additional plants. Tabletop and popup greenhouses are also available if the 6×8 is too much for you.
If you don’t have enough outside space or have a small yard, an indoor greenhouse or a compact greenhouse may be a better solution. Fun, charming, and cheap all rolled into one! In addition, it’s a terrific method to find out if a greenhouse is right for you prior to making a larger, more permanent investment in one of these structures.
Eight-by-twelve feet is the typical size of midsize greenhouses. Having more space to work with means you’ll be able to plant and harvest more food. For individuals who don’t mind spending a little more to get a lot more produce, a medium greenhouse is a great option.
For those who want to get serious about greenhouse gardening and have a lot of space, a large greenhouse is the best option. Large greenhouses are wider than medium greenhouses, allowing you to better utilize the space. Large greenhouses are typically 10 ft. wide and 16 to 24 ft. tall, however there are exceptions.
How to Choose the Right Greenhouse for You?
Buying a greenhouse, regardless of its size, is a long-term investment. Here are some other things to keep in mind while deciding which one is ideal for you:
Shapes like as octagonal and classic are among the most popular greenhouses. For a more contemporary look, consider a dome greenhouse.
Frames made of wood are the most economical and most long-lasting option. For metal frames, aluminum and steel are two options. Aluminum is a strong, lightweight metal. Additionally, it is rust-resistant. Large greenhouses, on the other hand, are best served by steel, which is more expensive but more durable.
The greenhouse cover that keeps your plants safe is called glazing. Horticultural glass, toughened glass, polycarbonate plastic, and others are all possibilities.
Glass is a terrific material if you’re concerned about how it looks. They’re built to last, and if one breaks, a new one may be quickly obtained. Glass, on the other hand, is pricey.
Polycarbonate plastic is a more cost-effective alternative to glass, as it is less prone to breakage and provides superior insulation. However, if the wind is very strong, the plastic may come loose from the frame. You should hire a professional to install your greenhouse rather than do it yourself.
Be sure to think about your budget before you start looking for greenhouses. Make a detailed list of all the items you’ll need and stick to your budget by planning ahead of time and knowing exactly what you’ll need.
Are Mini Greenhouses the Better Option?
Choosing the ideal greenhouse for your needs and tastes has already been defined. Mini-greenhouses, on the other hand, are an excellent entry point into the world of greenhouse gardening for those who are just getting started.
If you’re still undecided about purchasing a micro greenhouse, here are some of the reasons why:
Best for gardeners with limited space
A whole garden is out of reach for many of us. A tiny greenhouse is a great option if you want to cultivate your own fruits and veggies but have limited room. If you have a patio, deck, or even a table, you may set your little greenhouse there.
Extend your planting season
You can begin planting even before the cold weather arrives if you have a small greenhouse. Plants in your greenhouse can be moved outside once the weather warms up. You’ll be able to reap the benefits of a longer growing season by harvesting your crops earlier than usual.
Protect your plants from bad weather
You’re continuously exposing the plants in your backyard to the elements. Your plants will be protected from harsh weather conditions such as heavy rain, high winds, snow, and high temperatures if you keep them inside your greenhouse.
Repel insects and critters
Your plants’ leaves may become prey for aphids and beetles. Rabbits and deer are also known to feast on your crops. You may safeguard your plants from pests and vermin by keeping them in an enclosed area.
Create an ideal climate
Mini greenhouses allow you to cultivate the optimum indoor conditions for your plants. This means that you can sow warm-season crops in the winter and cool-season crops in the summer.
Are Mini Plastic Greenhouses Any Good? What You Must Know
The use of miniature plastic greenhouses is on the rise. When I started looking into whether or not little plastic greenhouses are a smart idea, I discovered a wealth of information. I’m going to share my findings with you in the following article.
When it comes to enhancing a backyard or allotment, a little plastic greenhouse is an excellent choice. Seed starting and plant cloning are two of their most useful applications. It’s also convenient to utilize little plastic greenhouses because they’re portable and don’t take up much room.
Gardeners who have a limited amount of room to work with are turning to unconventional methods.
A full-sized glass greenhouse may not fit in the outside space of certain persons.
A large amount of area is needed for these conventional greenhouses, and they are difficult to move into some settings.
There is a solution, however, in the form of small plastic greenhouses. These tiny units can be used for a variety of gardening purposes, from seed-starting to cloning and preserving the genetics of your favorite plants.
Obviously, it’s impossible to grow as many plants in a mini plastic greenhouse as it is a full-sized glass one, but they are a great way to grow small numbers if you have limited space to work with.
The advantages of mini plastic greenhouses
In a smaller plastic greenhouse, you can’t grow as many plants as you can in a full-sized glass one, but if you’re short on space, you can utilize them to grow a few more plants.
Popular among gardeners who have a lot of space, prefer to start their seedlings early, or need high humidity to propagate specific sorts of plants while they’re grown inside.
A positive thing about micro greenhouses made out of plastic is that they are really simple to build. Although there are numerous commercially available solutions, gardeners can also build their own.
It’s as simple as putting together a wire frame and covering it with a piece of clear acrylic. If you’d prefer to buy one, they aren’t prohibitively expensive when compared to larger glass greenhouses of the same size.
Mini plastic greenhouses are great for seed starting, as I briefly described before in this essay.
This is especially true if the little plastic greenhouse only has one tier.
As a result, the seeds are well-protected from the weather while receiving ample sunshine. Transparent amorphous plastics allow a large portion of the sun’s rays to reach the seeds.
The seeds are protected from wind and rain in the little greenhouse, and pests are kept at bay.
Mini greenhouses can also be used to clone plants that you already have in your garden. Plastic is a fantastic material for retaining moisture because of its ability to hold it in.
In order for cuttings to survive, they need humid conditions, thus little plastic greenhouses are ideal habitats.
Mini plastic greenhouses are also an excellent option for hardening off young plants.
During the process of “hardening,” I’m talking to allowing young plants to receive as much sunshine as possible while also shielding them from harsh weather conditions such as heavy rain and strong winds.
When seedlings are cultivated indoors, they can be harmed by the limited amount of light they receive.
In order to provide the young plants with as much exposure to natural light as possible, mini plastic greenhouses are an excellent alternative.
The disadvantages of mini plastic greenhouses
We must examine both sides of the issue to determine the merits of micro plastic greenhouses.
There are numerous reasons to include them in your garden, as I’ve outlined.
However, there are some drawbacks to be aware of, as with any piece of equipment.
Because of their small size, micro plastic greenhouses are vulnerable to wind damage. Some of the plastic covers, particularly those around the greenhouse door, may tear as a result of this.
Mini greenhouses should be placed somewhere that doesn’t get too much wind, or at least position the door side away from the most common wind direction if this isn’t possible.
Reinforcing your little greenhouse in the event of wind damage is another option.
Ground anchors or small pebbles and bricks can be used for this. The micro greenhouse’s resistance will also be affected by the materials used to build the frame.
Although galvanized frames are the strongest, they are also the most expensive.
Other than potential damage from wind, there aren’t really any other disadvantages of using mini plastic greenhouses. In the end, the benefits exceed the drawbacks in terms of usability, convenience, and price.
Keeping in mind that they are vulnerable to extreme weather conditions, you can plan carefully to prevent this from occurring.
One further thing to keep in mind while using a little plastic greenhouse is rainwater. The little greenhouse will grow distorted and may even collapse if it is exposed to too much rain.
As a result, the roof of your little plastic greenhouse should be shaped such that water can readily run off of it.
The manner a little plastic greenhouse is constructed has a significant impact on its long-term usefulness. The greenhouse’s framework is made up of substantial poles, and these poles must be constructed from sturdy materials.
If your garden experiences a lot of wind, this is a must-do.
What are mini plastic greenhouses good for growing?
Small plastic greenhouses are ideal for preparing young plants for the rigors of spring and summer.
With a smaller greenhouse, you’ll be able to produce more vegetables and less hardy annuals. As a compromise between a greenhouse and the harsher circumstances of a garden, these plants thrive.
It’s also a good idea to employ smaller plastic greenhouses for fragile summertime growers.
The ripening process is accelerated by the heat generated by the plastic greenhouse. A little greenhouse would be ideal for growing tomatoes, chillies, and aubergines during the summer months.
Plastic greenhouses are commonly used to grow heat-sensitive plants. This is due to the fact that they retain heat from the sun’s rays for long periods of time.
However, they aren’t limited to plants that thrive in full sun, such as annuals or vegetables that are easy to grow.
There are no limits to what can be grown in a little plastic greenhouse if the gardener is meticulous and intentionally generates the proper microclimate.
Fruits, vegetables, and annuals can all be grown, as well as more unusual plants like cacti and orchids, provided proper care is taken.
For seed starting indoors, you can also use small plastic greenhouses. The seeds will not be harmed by the additional protection provided by an indoor environment.
Putting them in a spot that gets a lot of sunlight throughout the day is essential, and once they’ve grown, you may move them outside.
In a humid atmosphere, seed germination is substantially easier. An indoor small greenhouse can be created with the help of fluorescent lights and heat pads.
The plants in your greenhouse may suffer irreparable harm if the door of the greenhouse cannot be opened easily with a zipper on a hot sunny day.
Mini Plastic Greenhouses vs. Glass Greenhouses
Glass panes are used in the majority of greenhouses. Glass is a popular choice since it allows nearly all of the sun’s rays to pass through, as well as being able to survive the inevitable rigors of extreme weather.
It is more cumbersome to assemble, more expensive, and more difficult to replace broken glass in a glass greenhouse than in a plastic greenhouse.
There are many advantages to using a mini plastic greenhouse over a glass one, especially if it is made from polycarbonate or another similar material.
Polycarbonate plastic is expected to supersede glass as the primary material for greenhouses in the near future, according to some horticulture experts. To understand why this can be the case, let’s take a look at some of the primary factors.
Mini polycarbonate greenhouses will outlast glass miniature greenhouses. It turns out that it’s really a more durable substance that can tolerate more wear and tear before it breaks down.
Because plastic is lighter than glass, it is less likely to be damaged when being handled or transported.
Changing sections of a plastic greenhouse is a simple task, however replacing glass panes is a more challenging task.
The common gardener may also easily build or put up a small plastic greenhouse. However, due to the difficulty of installing windows in a frame, most people opt to hire a pro.
Mini greenhouses made of plastic are excellent at insulating and conserving heat.
When it comes to this, polycarbonate plastic excels. Plastic is a better conductor of heat than glass.
When you consider the greenhouse’s modest size, this ensures that the average temperature is maintained at a greater level. Keeping a small greenhouse warm is critical to the health and growth of plants.
A small greenhouse’s ability to retain heat is possibly its most impressive feature.
It’s unlikely that a small plastic greenhouse will be shattered. Unlike glass alternatives, they are able to withstand the impact of other things.
Mini plastic greenhouses are a useful feature for those whose backyard doubles as a playground during the day. Smaller glass greenhouses have a much lower potential for injuries.
Another advantage of plastic is that it distributes light more evenly than glass.
Diffusion of light is the technical term for this action. If you have numerous plants growing in the little greenhouse, no one will be deprived of light because the plastic evenly distributes the light.
If a micro greenhouse is made of plastic, it will be shielded from harmful radiation such as UV, making it ideal for growing plants.
5) Longer Growing Season
All of the aforementioned advantages of tiny plastic greenhouses combine to extend the growth season.
These tools will help your plants, veggies, and fruits produce better year-round. This saves the gardener money, time, and effort in the long run.
It’s easy to shift your little plastic greenhouses around so that they’re always in the optimal spots for growth.
The best plastics for mini-greenhouses
The usefulness of little plastic greenhouses has been demonstrated, but it is vital to keep in mind that the type of plastic you use will have a significant impact on the construction.
Different types and their advantages are laid down below.
Mini plastic greenhouses are commonly made from polyethene.
An inexpensive and readily available material that can be easily repaired if it is damaged.
Agricultural polyethene is available in a variety of grades, some of which are better suited to general utility applications.
In terms of its drawbacks, polyethylene has only one: it isn’t as durable as other plastics.
It’s a hassle that most gardeners would prefer to avoid, therefore it’s likely to need some maintenance.
The low price makes this less of an issue, but more time and effort are required.
Polycarbonate is a little more expensive than polyethylene, but it is far more durable and sturdy. A combination of sheets, the many layers make it ideal for insulation.
In addition, it’s a pliable plastic that lets in plenty of light.
As a last resort, polyvinyl carbonate (usually abbreviated as PVC) might be used. Gardeners frequently utilize PVC for their tiny greenhouses because of its long-lasting nature.
Despite the fact that it can survive for many years before it needs to be repaired, the price is high. It’s ideal for making a little greenhouse because it’s usually available in smaller sizes.
The Best Compact Greenhouses of 2022
With a small greenhouse, you may extend your vegetable harvest into the fall or get a head start on spring planting. Plants in a greenhouse benefit from the diffused sunshine and protection from temperature changes, hazardous pests, and high winds provided by the greenhouse’s protective environment.
Do not allow the modest size of these compact greenhouses deceive you into thinking you need a vast backyard in order to reap the benefits of a greenhouse. Each one offers plenty of protection for seedlings and tender plants.
Even if you don’t have a huge backyard, a greenhouse can still benefit you, so don’t be fooled by its small size. Regardless matter the one you choose, seedlings and delicate plants will be well protected.
What to Consider When Choosing the Best Compact Greenhouse
While picking a small greenhouse may appear straightforward, there are a number of factors to take into account. The best tiny greenhouses have a long-lasting frame, a ventilation system, and are easy to assemble. You should know what to look for in a tiny greenhouse before you buy one, and we’ve put together a list of the best ones on the market.
Mini greenhouses come in a variety of shapes and sizes, and each has its own pros and disadvantages. Some varieties may be better suited to your outdoor space than others. There are a variety of options accessible to you depending on your space, money, and preference for a permanent or movable solution.
- Permanent and portable walk-in greenhouses are available. Gardeners are able to walk inside and tend to their plants because they are large enough. It’s possible that they have adequate space to keep gardening tools and equipment there as well.
- The term “pop-up greenhouse” refers to greenhouses that may be assembled, dismantled, and transported in a matter of minutes.
- They are modest, permanent constructions that don’t need to be dismantled after the growing season is through.
- There are tabletop greenhouses that can be used indoors or out. Beginner gardeners who want to transplant seedlings outside in the spring after growing them indoors will find these containers ideal.
- For small yards or balconies, vertical micro greenhouses are a fantastic option since they have shelving that maximizes vertical space without occupying much floor space.
Plants grown directly in the ground or in low-lying raised beds can be protected by horizontal mini greenhouses.
A compact greenhouse’s first consideration is how much area it will take up in your garden. Fortunately, no matter what kind of garden you have — a backyard in the suburbs, a patio in the city, or a tiny balcony — there are lots of possibilities. Think about bringing your little greenhouse indoors if the temperature drops below a specific threshold.
When it comes to compact greenhouses, anything that occupies less than 10 square feet of floor space is considered a “compact.” They’re usually not much more than 5’10” in height. In terms of size, models can be as small as a single square foot or as huge as walk-in models that can be used in large outdoor areas. Before making a purchase, make sure you’ve measured the available space.
There are advantages and disadvantages to both wooden and metal frames in small greenhouses. When deciding between metal and wood, keep these things in mind.
- Frames constructed of aluminum or powder-coated steel are quick to assemble and require little maintenance. Metals that won’t rust when exposed to moisture are commonly used in their construction. In many cases, metal frames can be assembled without the use of any tools thanks to the use of plastic connecting components.
- Stability is increased by the use of wooden frames, or “cold frames.” Those living in more temperate climes can utilize them all year round. They do, however, necessitate a higher level of care because they are susceptible to rot in moist environments. They may need to be sanded and re-stain every few years.
Glass-paneled walls are common in greenhouses of all sizes, including some of the most expensive tiny greenhouses. Seedlings thrive in settings where they can be exposed to direct sunshine and are protected from the elements by the toughness of glass. Polycarbonate panels, on the other hand, are a less expensive and more durable alternative. Unfortunately, they don’t allow in as much light as more standard glass panels, which is a major drawback.
Plastic cladding is the most cost-effective option for tiny greenhouses. Plants may be harmed by overheating in the interiors of these greenhouses, which are easy to disassemble and relocate. Gardeners who use this type of greenhouse must be aware of the dangers of overheating and over-humidity. Roll-up windows and doors are essential for controlling ventilation. It’s possible that greenhouses with plastic siding may not be able to withstand strong gusts.
Tiers and Shelving
Using tiers or shelving in a more compact greenhouse allows you to optimize the structure’s vertical area. Wood, plastic, or metal shelves can be used to match the structure’s framing. A variety of greenhouse shelving options are available, including fixed shelves and adjustable shelves.
Shelving is useful for storing extra plants, but it isn’t the best place to start seedlings. Seedlings on lower shelves are unable to obtain enough sunlight because of the shade created by the upper shelves.
Consider your intended purpose before making a purchase decision on a small greenhouse. If you plan to relocate your mini greenhouse from one indoor or outdoor location to another, opt for a portable model. Plastic cladding and lightweight metal frames are the most convenient solutions.
Wooden or glass-paneled mini greenhouses look fantastic and endure a long time, but they aren’t the most portable options.
There are a variety of characteristics that can be added to the basic structure of a greenhouse: a frame, a cover, and shelving.
- A roll-up door or window can help keep the temperature inside the structure at a level that some plants can’t handle. On hot days, roll-ups are the best option.
- Evening and early morning plant care is made easier by the use of in-house illumination in some of the more expensive small greenhouses.
- A heater, fan, or misting system, available separately, can be used to regulate the temperature and humidity of the inside of some units.
Our Top Picks
The time has come for you to begin your search for a tiny greenhouse. You’ll find the greatest tiny greenhouses for your garden in this list. High-quality construction, a wide range of sizes, portability, and other benefits are all part of our picks for the best tiny greenhouses available today. There’s a strong chance that one of these walk-in, tabletop, or pop-up greenhouses will work well in your garden.
Nova Mini Walk-In Greenhouse
The polypropylene roof of the walk-in greenhouse diffuses harsh sunshine and shields delicate plants from light frost. It’s made to last. Setting up and dismantling the sturdy anti-rust steel tubing structure is simple. The building is 57 inches long, 57 inches broad, and 77 inches tall.
- Several trays and containers are arranged on eight separate shelves.
- A roll-up door that can be zipped shut
- Straps and anchors ensure its safety.
- can be reduced in length by omitting some of the framing
- Potted plants are too heavy for shelves.
- Zip ties may be needed to secure shelves.
MINI LOP Mini Pop up Greenhouse
- Ideal for securing small trees or plants.
- Pop up or down is a breeze
- Ventilation is provided by a zippered door.
- Indoor and outdoor cats alike can benefit from this product.
- Heavy snowfall may be too much for it.
- Miniscule compared to expectations
Nova Mini Walk-in Greenhouse, 6 Shelves
Nova Mini Walk-In Greenhouse is a 55.9-inch wide, 28-inch deep, and 75-inch high greenhouse. The greenhouse is easy to put together and comes with a handy carry bag.
- A roll-up door that can be zipped shut
- Enough sturdiness for the cold but still letting in light
- Several trays and containers are arranged on eight separate shelves.
- In the summer, it can be stored in a storage bag.
- In high winds, additional anchors may be necessary.
- Zip ties may be needed to secure shelves.
Ohuhu Mini Greenhouse for Indoor Outdoor 4 Tier
The four steel-wire shelves are supported by a robust metal frame with plastic connectors that can hold up to 23.4 pounds. This type is easy to dismantle and reassemble at the end of the growing season thanks to its simple, tool-free construction.
- There are four sturdy steel plant shelves.
- Tiny areas benefit from having a small footprint.
- A roll-up door that can be zipped shut
- Secure the greenhouse with the supplied hooks.
- Nothing is included in the way of stakes or anchors
Palm Springs 2-Tier Mini Greenhouse
The Palm Springs mini greenhouse is ideal for preserving delicate plants because it is easy to install. The 37.5-inch-tall structure is ideal for patio tables, tiny backyards, decks, and balconies.
- A pair of metal shelves
- Inside, clear PVC is more visible.
- A roll-up door that can be zipped shut
- In most cases, a shorter design works better.
- Heavy plants may not be supported by the shelves.
Quictent Mini Walk-in Greenhouse 3 Tiers 6 Shelves
A heavy-duty powder-coated tubular steel structure is supported by a waterproof PVC cover. Each shelf can accommodate up to 17 pounds of pots, seedling trays, and other gardening supplies. Gardeners have more control over airflow with mesh and PVC doors. Fresh air is brought in but hungry animals are kept out thanks to a mesh screen window on either side.
In addition to the greenhouse frame, this set contains 50 plant identification tags and 30 zip ties.
- There are six steel shelves in this set.
- More plants in a smaller space
- Windows made of hook-and-loop mesh
- Plastic and mesh screen doors
- Tighter frame attachments are possible.
- Wind may necessitate further protection.
EAGLE PEAK Mini Garden Portable Greenhouse
The heavy-duty powder-coated steel frame of the greenhouse is secured by ropes, and stakes anchor the greenhouse in place. 71 by 36 by 36 inches is the size of this ground-level greenhouse.
- Design for huge rooms in the long and low style
- Ventilation can be gained by opening up either half or the entire side.
- For use with larger plants or garden beds
- There are no bookshelves.
- It must be anchored to the ground in some way.
This is a terrific tool for gardeners of all skill levels, whether you have a huge backyard or a few feet of additional space on your balcony. It will help protect your plants from pests and other dangers such as the elements. As a result, the Nova Mini Walk-in Greenhouse is our top pick for winter gardening because it fits all of these criteria.
How We Chose the Best Compact Greenhouse
A sturdy greenhouse that can withstand cold weather, frost and snow was a primary consideration while making our list of the finest compact greenhouses. Many diverse styles of products fit these characteristics, even if they are all distinct in their own way. In order to better serve the diverse demands of our potential customers, we focused our investigation on greenhouses that come in a variety of sizes and designs. Some greenhouses are big walk-in greenhouses, while others are low and wide.
During the damp winter months, we only chose models that use metal structure that is resistant to rot. A door or window or both are included in every model we sell. At the conclusion, we’ve offered suggestions with shelves to accommodate additional plants and one design intended to protect huge ground plants from damage. Compact greenhouses are available in a range of styles and sizes to suit your needs.
The Advantages of Owning a Small Greenhouse
Gardeners with a limited amount of outside area might use little greenhouses to keep their plants warm in the winter. Compact greenhouses can do the same tasks as normal greenhouses while taking up less space on a patio, balcony, or even in a small yard.
Mini greenhouses, on the other hand, tend to be smaller and more portable, making them ideal for growing plants on the go. Infra-red heating systems:
- Keep pests and animals away from your plants.
- Extend the growing season and let you start seedlings earlier
- Extend the growing season and let you start seedlings earlier
- Allow you to start seedlings early in the growing season.
- Prevent rainwater from reaching your plants to avoid soil erosion and overwatering.
You may still have some concerns about the greatest small greenhouses for your needs and requirements. Some common questions concerning micro greenhouses have been answered in this area to assist you decide whether or not to buy one.
Q. What is a mini greenhouse for?
There are several reasons to utilize a tiny greenhouse to keep plants out of harm’s way. It’s a great way to extend the growing season and grow seedlings, seedlings, or mature plants in colder temps in smaller gardens or patios.
Q. What is the smallest size greenhouse?
Small indoor greenhouses for germinating seeds can have a footprint of less than one square foot and come in different shapes and sizes.
Q. Should a greenhouse be clear or opaque?
A greenhouse with clear or opaque sides provides a variety of light sources. Seeds and seedlings thrive in direct sunshine, which is why clear siding is perfect. However, if you’re looking to grow plants to maturity, then opaque paneling is the best option because it prevents hot areas.
Q. How thick does the plastic need to be for a greenhouse?
In order to get the best quality and longevity out of your greenhouse, seek for one with a plastic cover that is at least 6 mils thick (or 0.006 inches).
Q. Can I put a greenhouse in the shade?
A greenhouse cannot be placed in the shade. Full-size greenhouses require six to eight hours of direct sunshine a day, whereas small greenhouses can operate on as little as four hours of direct sunlight a day.
Final Thoughts on Walk-in Greenhouse vs. Mini Greenhouse – Which is Better for Starting Plants
Which is preferable for starting plants: a walk-in greenhouse or a tiny greenhouse? Inexperienced gardeners might do better with a small greenhouse. You won’t have to spend a fortune to get the same results. The cost of building a large greenhouse is prohibitive. A walk-in greenhouse requires a lot of space and a lot of time to maintain.