Updated at: 14-10-2022 - By: Sienna Lewis

Why does your little greenhouse have a strange odor? Your greenhouse should have an earthy and damp aroma, like that of a plant nursery. There may be too much water in the soil in your greenhouse if the air smells like rotten eggs with a hint of ammonia or sulfur.

Toxic odors are caused by the presence of bacteria in extremely damp soil. When soil drains correctly, plants are able to breathe. The soil drainage cannot be obstructed by water, thus air cannot pass through.

Why Does My Plant Smell Bad?

Even though your plants appear to be healthy, a foul scent may suggest that something is wrong with them. In order to fix the problem, you must first identify what is creating odors in the first place.

Common causes of rotten smell

That musty greenhouse scent may be the result of too much watering, as we’ve already established. The odor-causing bacteria thrive in potted plants because of the water that pools around them.

Root rot can occur as a result of an excessive amount of moisture in the soil, and this can lead to the death of your plant. Removing the plant from the pot will allow you to see whether there is an issue. Overwatering your plants can be seen by the water at the bottom becoming murky and smelly.

Getting rid of the bad odor

Transplanting the damaged plant into new, well-drained soil is the first step in eliminating the rotting stench. To avoid the death of the smelly plants, early discovery is essential. Perlite, peat moss, pine bark, or vermiculite should be used in the new soil.

Why Does My Mini Greenhouse Smell Weird? - Krostrade

Make sure to properly clean the drip plate, which catches the plant’s murky water, using soap and water. Your plants will continue to smell if you don’t clean the plate. Mold and mildew may also develop.

Avoiding bad odor

Avoid overwatering your plants to keep them from stinking. When the soil is damp, moisten the top of the pot until the water leaking from the bottom of the pot is no longer visible. Pots should include drainage holes so that excess water may be drained. As a result, the water does not become foul-smelling and stagnant.

How Should You Properly Care for Your Mini Greenhouse?

Taking care of your greenhouse is as important as caring for your plants. After each growing season, thoroughly clean the inside of your greenhouse with warm soapy water. You’ll be able to get rid of fungus spores, bugs, and germs this manner and prevent their growth. Additionally, make an effort to thoroughly clean the containers and till the soil to improve airflow and add fresh compost on top.

For years to come, you’ll be able to reap the benefits of your greenhouse thanks to these simple guidelines.

Are Mini Greenhouses a Great Investment?

Gardeners can’t go wrong with a small greenhouse. Even if you’ve been gardening for a long time or are just starting out, there are many benefits to having a little greenhouse.

Prevent harmful insects from destroying your plants

It doesn’t take long for a variety of pesky insects to decimate months’ worth of hard work by munching on your leaves and crops. Insects are kept at bay when your plants are housed in a little greenhouse.

Mini greenhouses are perfect for gardeners with limited space

For those who enjoy gardening but lack the space to do so, a compact greenhouse is an ideal solution. The most frequent size of a little greenhouse is 6 by 8 feet.

If you have a balcony, patio, or even a tabletop, you can put it there. There is no difference in the benefits that can be gained from a mini-greenhouse to those that can be gained from the larger greenhouses.

Ideal for beginners

The greatest place to start if you’re new to greenhouse gardening is with a little greenhouse. Begin with a tiny area and get to know the perfect circumstances for the plants you intend to produce. Once you’ve mastered the basics, you can expand your greenhouse to a greater space.

Extend your planting season

You can begin sowing seeds in a little greenhouse even before the first frosts arrive. You can begin transplanting your plants into your garden when the weather warms up. You’ll be able to increase your harvest and lengthen your growing season.

Protect tender plants from bad weather

Tender plants benefit from the use of mini greenhouses. Your plants will be safe from cold, severe rain, and strong winds if you keep them in an enclosed area. The small structure will keep them secure and healthy till spring comes around. If there’s no threat of frost, you can replant them in your garden.

Create an ideal climate for your plants

There are a wide variety of options available when it comes to greenhouse design. Regardless of the weather outside, you’ll be able to create an optimal environment for your plants. Because of this, it’s possible to grow both warm- and cold-season crops at the same time.

How to Keep Hydroponics Systems from Smelling Bad

Many people find the smell of hydroponics to be a nuisance, but with a bit of care and understanding, a well-run hydroponics system does not have to become a slimy, stinky mess.

Grow Hack: Odor Control Strategies & Their Best Applications | High Times

Tip #1 – Keep the System as Free of Organic Materials as Possible

Hydroponics systems might suffer from foul smells due to nutrient solution issues. Bacteria break down proteins, releasing amines and sulfur-containing organic compounds into the environment, causing bad odors. Having organic components in the system results in microbial growth in the nutrient itself (fungi etc need organic matter to feed on). Therefore, it is essential to avoid the addition of unnecessary organic material to the nutrition solution or growing media. ‘ There may have been a lot of old decomposing root systems or vegetation from a prior crop or the usage of organic growing material that contributed to the organic debris. Avoid these issues by utilizing non-organic starter plants and a non-organic growing medium in the system to avoid these issues. Replace or clean the growth medium between crops to get rid of any organic debris that has accumulated. To keep out light and other organic debris, store the reservoir in a dark, well-ventilated area.

Tip #2 – Take Steps to Maintain a Microbial Equilibrium in the System

However, there are helpful bacteria that may be added and fostered in the system to counteract the foul odours, slime, and other undesired issues. Inoculate the nutrient solution with a combination of helpful bacteria after adding the nutrients to a clean, sterilized water source. This promotes the growth of beneficial bacteria and creates a healthy environment in which pathogens are less likely to cause damage to plants.

Tip #3 – Use Only Nutrients and Additives that are Specifically Designed for Hydroponics

Organic fertilizers used and designed for soil-based systems should be avoided. Microorganisms in the soil break down organic materials to release nutrients, and many of these rely on increasing the population of soil microbes. In high quantities, using soil-based organic fertilizers (such as fish emulsions) in hydroponics can have quick and unpleasant outcomes since many of the organic chemicals are not fully mineralized.

Tip #4 – Keep the Nutrient Solution Well Oxygenated

Maintain a clean environment and maintain the nutrient well-oxygenated. As a result, the beneficial microorganisms have an advantage, and the roots of the plant receive oxygenated fluid. The use of an air pump and an air stone is recommended to increase the amount of oxygen in the nutritional solution. If you spot any ill or stressed plants, remove them as soon as possible, making careful to get all of the roots out of the system.

Tip #5 – Flush the System and Replace the Nutrient Solution Often

The nutrient solution can be tested frequently to ensure optimum pH and nutrient levels are maintained, but replacing the solution at least once every week or two weeks is more useful and easier. Draining the system should be as simple as opening a water pipe. When the reservoir is low, drain the system. In a watering can, pour the solution out until the pump begins to suck air. This nutrient-rich water can be used to water plants that grow in the soil. Flush the system by running it for five minutes with a gallon or two of pH-corrected water added. Fill the system with a pH-adjusted nutrition solution and beneficial bacteria once more before draining and refilling.

Tip #6 –  Consider Ozone Generators and Carbon Filters

Hydroponic odor management may be unneeded if the general hydroponics techniques outlined in the previous suggestions are adhered to, and ozone generators and carbon filters are no substitutes. It’s worth noting, though, that they may have other advantages that are worth exploring. Because of the continual breakdown of excess ozone in water to produce oxygen, nutrient solutions are given a boost in oxygenation, resulting in faster root development, healthier plants, and higher yields. To get rid of odors, carbon filters are the finest option. A variety of charcoal filters are available in various sizes to accommodate a variety of growing environments, and they’ve long been known as one of the best air purifiers available. Installing and maintaining a carbon filter is a cinch.

A microbial equilibrium may be established in a hydroponics system that not only reduces unpleasant aromas, but also yields higher yields as a result of consistent use of the above guidelines.

Gardener and author Christopher J. Kline lives in Arizona’s Paradise Valley.

Top 10 Greenhouse Gardening Mistakes

Plants are placed under a layer of glass or other light-absorbing material to capture the sun’s heat. The method of growing plants in a greenhouse takes some balance and finesse, however, due to the complexity of living objects like plants. Aside from that, you’ll need to be careful to prevent making blunders that could jeopardize the health of your greenhouse.

When gardening in a greenhouse, here are ten things to keep an eye out for.

1. Neglecting to control the temperature

One of the most common mistakes made by gardeners is failing to keep an eye on the temperature of their greenhouse on a regular basis. Temperatures of 75-85° F during the day and 60-76° F at night are generally considered suitable for greenhouses in the summer. 65 to 70 degrees Fahrenheit during the day, and 45 degrees at night.

Ventilation, shade cloth, and heating are the greatest ways to regulate the temperature. The relative humidity, which is crucial for minimizing heat damage, may be measured using a digital thermometer for only a few dollars more.

2. Not considering nearby trees

Planting a greenhouse in the wrong location is a common mistake greenhouse owners make. Nearby trees are often responsible for this; not only can they block sunlight, but they can also drop debris throughout the year.

There is a risk of more shading and significant damage if leaves are not removed from the greenhouse. Another potential source of nutrient and moisture theft is through adjacent trees’ subterranean roots.

Consider the positioning of neighboring trees and locate your construction in such a way as to protect it and anything growing inside it. If your greenhouse already has trees that are causing problems, you may want to consider cutting them down or maybe removing them entirely.

3. Forgetting to provide shade where needed

Likewise, there are times when a controlled amount of shadow is desirable for your greenhouse. In spite of your best efforts to keep an eye on the temperature, it is possible to unintentionally cause stress to plants.

Air and leaf temperatures will rise as the greenhouse gets hotter due to a wide range of sun radiation. Shade cloth and ventilation work together to keep your plants cool and save water, so it’s a win-win situation. The shade cloth shields the plants from some of the sun’s rays.

4. Not controlling the humidity

As part of the greenhouse water cycle, humidity is inevitable. The roots of plants absorb water, which they eventually release into the atmosphere through transpiration. However, the air’s ability to contain water decreases with each dip in temperature.

Tomatoes and cucumbers, which are commonly grown in greenhouses, are particularly vulnerable to rapid temperature changes. While a high-tech monitoring system is an option, the key for a hobby gardener is to keep temps consistent.

Keep the greenhouse well-ventilated throughout the hottest part of the day to avoid temperature spikes, and shut off cooling fans and ventilation windows well before nightfall or cloud cover to avoid overcooling.

Consider using barrels of water as a low-tech heat sink in the winter. To avoid dew on your plant’s leaves, you should get a humidity monitor that can tell you what the humidity level is at any given time.

5. Failing to ventilate

In order to maintain a stable temperature in your greenhouse, proper ventilation is essential, yet this is typically lacking in many buildings. Divide your entire floor area by five to get an idea of how much ventilation you’ll need. An area that can be opened via windows, vents, or rolling walls should account for no less than 20% of your overall floor space.

When you open the window, that doesn’t mean the greenhouse is venting – the air needs to flow through first. Because hot air rises, this means that the warm air is being pushed out of the top. Through the bottom, you can draw cool air in, and through the ceiling, you can let heated air out. In order to keep the air circulating, a tiny fan may be necessary.

6. Encouraging fungus

As a result, mold and fungus thrive in warm, damp settings. To avoid mildew, keep your greenhouse’s humidity level under 85 percent, and don’t let water or dew sit on your plants’ leaves.

To avoid this, you should use a fan to circulate the air around you. It’s also critical to ensure that your plants are spaced far enough apart. Leaf drying can be prevented with the use of drip irrigation.

Fungi such as grey mold, powdery mildew, and black sooty mold can cause blight, rot, and other reactions in plants; signs include spots, blight, and other reactions. Because the fungus lives in the soil, you may observe these symptoms without seeing mold. Cleaning your greenhouse and tools with vinegar or oxygen bleach once a year is an excellent idea to start with a clean slate.

7. Depleting the soil

There are a few additional obstacles to soil management in a greenhouse compared to the rest of your garden. It is easy for the soil to become compacted, lose fertility, and attract pests if you cultivate the same crops in the same place over and over.

Add compost and fertilizer to the mix while creating beds, but don’t forget the essentials. To avoid pests and disease, never use old potting soil. In fact, many experienced organic growers suggest using a soilless mix.

Peat, coconut fiber, perlite, vermiculite, worm castings, and compost are common ingredients in these blends. As a hobbyist, you can get the same benefits by simply using high-quality compost.

8. Watering too much or not enough

For a greenhouse, drip irrigation is almost always the best option. However, quantity is just as crucial as the technique of doing it. Because of the high amounts of humidity, it’s quite easy to miswater greenhouse plants.

You can tell how much water is needed for your plants by how dry they are at the end of the day by watering them first thing in the morning. Before the temperature rises, plants have time to expel water through their stomata. It’s important to keep an eye on the amount of water you give them at the same time. Plants will use a lot of water if it’s hazy, but they won’t be able to utilise it. Check on them later in the day and re-water if necessary.

When the plants are young and developing quickly, and the temperatures are high, you will need to water more regularly in the spring and summer.

How To Build the Best Greenhouse for Growing Marijuana - RQS Blog

9. Limiting light

Even though we’ve already talked about restricting light intentionally with shade cloth, it’s possible to reduce the amount of light your plants receive without even realizing. The light transmission rating of greenhouse covers can be seen on the label. Six millimeters thick and 91 percent light transmittance per layer are the normal plastic cover specifications. However, when the plastic ages and gets yellow, the transmission rate will decrease.

In order to keep track of this, you can buy a solar power meter. Direct sunshine has a BTU output of 360 per square foot per hour, while plastic insulation has a BTU output of 327 per square foot per hour. UV rays can burn plants in an 8mm polycarbonate greenhouse, which has an 80 percent light transmission rating. A dirty polycarbonate greenhouse can impede light transmission by as much as 10% or more, despite the fact that they don’t become yellow with time. Maintaining a clean and current greenhouse cover can minimize light transmission by an additional ten times.

10. Growing the wrong plants inside

One of the biggest mistakes I’ve made in greenhouse farming is attempting to start everything too early and assuming that warmer is better for everything. When it comes to gardening, it’s easy to get caught up in the thrill of the hunt for the next big thing.

To get the most out of your gardening space, check the appropriate temperatures for your plants and lengthen the growing season. This implies that you can start seedlings in your greenhouse in the winter and then transplant them outside once the weather warms up. There are times when it’s too hot to plant tomatoes and other crops that thrive in hot weather. Achieve your goals by remaining focused.


Why does my greenhouse smell like ammonia?

Microbial activity is inhibited by a lack of oxygen in gardens and compost piles. Composting organic matter is impossible without sufficient oxygen, but adding more oxygen to the soil is a simple solution.

Why does my greenhouse smell?

The most common cause of strange aromas in your greenhouse is overwatering. Your plants will not emit these noxious odors if they have an adequate drainage system. Also, keep an eye on your soil to see if it’s getting too wet, and check the drip plates for dirty water that has accumulated.

Why does my plant smell like chemicals?

Slow growth, squishy stems, and wilting, yellow, deformed leaves are all symptoms of root rot (especially when the plant has been well watered, as wilting leaves can also be a sign of a dry plant). The roots are usually reddish brown and have a bad smell.

Why does it smell like ammonia outside?

Leaks and accidents at manufacturing and storage facilities, as well as pipelines, tank trucks, railcars, ships, and barges used to transport ammonia, can all result in large volumes of ammonia gas being released into the atmosphere.

The Bottom Line: Why Does My Mini Greenhouse Smell Weird?

So, what’s up with the strange odor emanating from your miniature greenhouse? One of the most common causes of a bad smell in your greenhouse is overwatering. It’s a good idea to keep an eye on how often you water your plants. For optimal drainage, ensure that your soil is well-oxygenated and that your pot has a sufficient number of holes.