Welcome to the Krostrade Marketplace, please excuse our appearance, we are still under construction.

How To Keep Plants In Greenhouse From Growing Mold

Addressing the worry of how to keep plants in greenhouse from growing mold, manage the humidity, ventilation and circulation, and spacing and cleanliness indoors. We already know how worrisome it is to see mushrooms growing in the greenhouse, but what more if what’s growing indoors is a type of fungi that’s detrimental to plant health. Mold infestation in the greenhouse affects crops’ production, but the good news is it’s preventable with simple management practices.

When one sees mold growing in the greenhouse, it can pertain to different types of fungal diseases. White mold and gray mold are equally concerning to see indoors, but both also have the same management practices to prevent them from growing. The three methods below will keep your greenhouse healthy and mold-free.

How To Keep Plants In Greenhouse From Growing Mold

Guide On How To Keep Plants In Greenhouse From Growing Mold


Humidity control

When we think of mold and fungal growth, our minds automatically go towards the greenhouse humidity level. One of the most common fungal diseases, gray mold, or Botrytis blight, is manageable with proper humidity control. And if you think about it, controlling the indoor humidity will cost you way less than the loss you’ll experience from fungal diseases.

So how does one manage the humidity in the greenhouse? The University of Massachusetts Amherst recommends proper ventilation and airflow. This article will discuss these two practices in greater detail later on. 

Additionally, you can also use a dehumidifier to decrease the indoor humidity to prevent mold germination. Remember that if the greenhouse’s relative humidity goes over 85%, in addition to poor air circulation, warm temperatures and standing water will inevitably lead to the growth of mold. Therefore, ensure that the humidity level indoors should only be around 50 to 60%. 

This way, the plants still get their requirement, but you’ll also not encourage mold growth. 


Proper ventilation and circulation

As mentioned earlier, proper ventilation and circulation are the keys to preventing mold growth. You do this by using the vents and adding fans to the greenhouse. If you live in a humid area, a dehumidifier will also help maintain the humidity level in the greenhouse, but incorporating these two practices will be optimal. 

What ventilation and air circulation do for the humidity is to ensure that potentially moldy air goes out and fresh air comes in the greenhouse. Additionally, ventilation helps regulate the temperature to prevent the growth of mold. You can start by opening the vents in the greenhouse, and then you can gauge if you’ll need to add fans later on. 


Proper spacing and cleanliness

Besides the greenhouse conditions, a significant factor for preventing mold growth is proper spacing and cleanliness. We know that hygiene plays a huge role in keeping grass from growing in the greenhouse, which is also applicable to mold prevention. Much like weeds, spores of fungi quickly spreads through direct contact, air, and water. 

Ensuring proper spacing will prevent infection among plants and, as a bonus, also helps with air circulation and drying time after watering. This is because standing water on the surfaces also supports the growth of mold. Additionally, since fungi spread via the air, an air purifier can kill spores that might be present indoors. 

Lastly, cleanliness and sanitation throughout the surfaces, walls, and floors will help prevent fungal infection. It also includes thinning plants, removing dirty water, clippings, and potting soil, and wiping the tools you use for gardening. Infected soil and plant material can also cause mold problems, so be diligent in everything you bring and use in the greenhouse. 


Common Fungi In Greenhouse

Different types of fungi can grow in the greenhouse. However, the common ones are gray mold, white mold, powdery mildew, and black sooty mold. Most greenhouse gardeners tend to see gray mold as the familiar one because it can infect almost any plant. 


How To Get Rid Of Mold In Greenhouse

If you already have an existing mold in the greenhouse, you don’t need to fret because you can still get rid of it, depending on the circumstances. For example, both gray and white mold is the most problematic because you have to remove the infected plants in the greenhouse and bury them to prevent spores from spreading. On the other hand, you’re in better luck if you’ll be tackling powdery mildew because you can remove the infected leaves, and you’re good. 

What about black sooty mold? Bugs like aphids cause this infection, and therefore, getting rid of bugs will solve this issue. Start removing ants as they support other bugs, and then use insecticidal soap to manage the insects and pests. 



Greenhouse gardening will only be productive and rewarding if you know how to prevent potential problems beforehand. One of the common issues that you must learn is how to keep plants in a greenhouse from growing mold. With proper management practices like managing the humidity, ventilation, and circulation, and ensuring the spacing and cleanliness indoors, you don’t have to fear fungal diseases. 

The common molds in the greenhouse are gray mold, white mold, powdery mildew, and black sooty mold. Each of them has different ways of removal, so it’s best to practice prevention instead. Overall, the practices you’ll do to prevent mold growth will benefit you, not just against fungal diseases. 

Your plants will also thrive, and you can avoid other greenhouse problems. It’ll be like hitting multiple birds with one stone. 


One comment

  1. I appreciate that you brought up how you can prevent your plants from developing harmful diseases like gray mold by ensuring that humidity the levels are adequate. My uncle is thinking about growing lettuce in a greenhouse that he recently purchased last year, but he wants to keep the humidity levels consistent since the weather tends to fluctuate in his area. Maybe he should find a way to manage the humidity in his greenhouse.

Leave a Reply

Your email address will not be published. Required fields are marked *

How To Care For Carpet Roses. 3 Factors To Master

How To Care For Carpet Roses. 3 Factors To Master

You have three factors to consider to know how to care for carpet roses. Gone are the days where roses are only centerpieces, but with proper care and maintenance, you might have one of the best groundcover plants. Carpet roses will undoubtedly improve any garden bed, and you’ll be pleased how they are not even demanding constant attention. 

If you want to protect your plants from challenging environmental conditions, you can also consider growing carpet roses in the greenhouse. This will make maintenance more comfortable, and you should face fewer challenges and problems. This article will teach you the ideal conditions and practices to keep your carpet roses blooming happily. 


In general, carpet roses are easy to grow and are relatively low-maintenance. However, the emphasis is necessary on knowing the variety you have and adjusting the plants’ practices and requirements accordingly. 


Factor #1. Location

The first consideration to ensure proper care for carpet or groundcover roses is in the ideal growing environment. Remember that even though groundcover roses are not picky in sites, they should still be in an optimal location to thrive. You can determine the ideal location of your carpet roses depending on their type

For example, some groundcover roses prefer full sun, but others will thrive in partial sun. You also want to plant them in well-draining soil because these plants are prone to drowning. After ticking these boxes, allocate enough space for the carpet roses to keep them from getting overcrowded that can cause problems over time. 


Factor #2. Maintenance

The second factor when caring for carpet roses is the practices in maintaining them. To start, remember that it’s crucial to plant them in a well-draining area. Overwatering the plants or leaving them in standing water can drown the plants or encourage root rot. Always check the ground if the roses need watering and amend the soil to improve its structure.

Carpet roses will also benefit from fertilizers. You can boost the plants and encourage them to fully cover the ground by feeding above and below the roses. Check the label instructions of your fertilizer and put your plants on a schedule for fertilizing regularly. 

Do you prune carpet roses? Depending on what type you have, some roses will benefit from pruning. You can cut the stems after flowering to keep the roses from overgrowing their area and maintain a tidy look. 


Factor #3. Common problems

Carpet roses, much like other groundcover plants, are prone to pests because of the large surface area they have. Therefore, prevention is vital to keep the pest population at bay. Gardeners often use insect spray or fungicides on the carpet roses to keep off insects or fungi. 

You can also practice preventative measures such as isolation of new plants and immediately removing plants with pests or diseases to prevent the spread. Always practice proper hygiene and sanitation to avoid bringing pests into the area. More so, maintain the ideal environment to discourage insects’ reproduction like aphids or the development of diseases like powdery mildew. 

Unlike other groundcover plants, carpet roses don’t have enough foliage to smother weed. Therefore, you want to use landscape fabric with drip irrigation on top to deter weed growth. You can also mulch under the systems or add a pre-emergent herbicide in early spring or fall to manage weeds.



How To Grow Carpet Roses

You can propagate carpet roses by rooting sections of the stem of a parent plant. Carpet roses typically develop rooted stems in spring or fall that you can dig up and repot. However, remember that the best propagation method will vary on the type of roses you have, 

You may also purchase potted ground cover roses, and you can transplant them in a bigger container or onto the ground outdoors. You can again grow bare-root carpet roses after the frost in the garden the same way you would when planting other roses. Amend the soil with organic matter and water the plants after putting and firming them in place. 

Because of their low-growing habit, you can have many uses for carpet roses. You can use them as borders or barriers for paths and driveways, add texture to a slope or wall, or fill a bed in the garden. However, be prepared that these plants can become leafless during the dormant season. 



One of the best groundcover plants to consider is carpet roses. However, you must know how to care for carpet roses to keep them healthy and looking tidy. To start, grow them in an ideal location to lessen the chances of developing drawbacks and problems. 

You can check the type of roses you have to know where is the best place to grow them. Once you have ensured the ideal location, maintain your plants by watering and fertilizing regularly. Be mindful not to overwater your plants as this can drown them, and you can also boost growth by feeding according to the label. 

You can also keep the roses from overgrowing their space by pruning after the flowering season. Lastly, do the necessary preventative measures to keep the roses from acquiring pests and diseases. Use fungicide or insect spray to keep fungi and pests at bay and maintain stable conditions to discourage growth and spread. 

Leave a Reply

Your email address will not be published. Required fields are marked *

Sign up to our newsletter!