Can I Use Moldy Coffee Grounds in My Garden

Zach's writing ranges from matters of gardening, cooking, aquariums, and fish to more niche topics similar coin collecting.

Struggling with moldy soil? Hither's how to get rid of it without using chemicals.

White, Fuzzy Growth in Potted Plants

All is fine and dandy until yous wake upwards one morning to discover that your favorite potted plant is growing fuzzy, white mold. Worried, you run to Google, type in "moldy potting soil," and end up here. That's a good thing too, because I've got the answers!

That stuff is probably a harmless saprophytic fungus. Below, you'll learn whether or not to be worried, how to remove the mold naturally and safely, and a few proactive steps yous can take to ensure that it doesn't return. The procedure is quick and painless, for both you and your plants!

Is Moldy Soil Bad for Plants?

The quick answer is no, that white stuff growing in your potted plants will probably not harm them. Although you don't always run into them, molds and fungi are present in every organic gardening mix. In fact, many organic gardeners believe that "living soil" is the ideal environment for growth. So information technology's a sign of life, although it might non be one you desire to wait at, since it's not exactly pretty.

On the other mitt, a saprophytic fungus might likewise be a sign that your constitute is not getting what it needs in terms of sunlight, air circulation, and moisture. The mold might also be competing for nutrition with your plant, so it is also a sign that yous need to pay attention to.

How to Remove Mold From Soil

If there'south mold growing under your houseplants, or in whatever container constitute for that matter, here's what to practise:

1. The beginning step is physical removal. Wearing a breathing mask, scrape off and discard the affected bits of soil.
2. Lightly grit the soil with ground cinnamon. Cinnamaldehyde, the stuff that gives regular cinnamon its flavor and scent, acts as the perfect natural fungicide and prevents mold growth. Try to get an even distribution and remember that it only takes a thin layer.
3. Practice not water until the acme two inches of soil are dry. For smaller containers (a gallon or smaller), wait until the pinnacle quarter inch has dried before returning to a water regimen. Use your finger to judge moisture levels.

Potted plants are prone to mold. Impermeable plastic containers and pots without holes retain moisture.

What Else Can You Do?

• Never let pots sit in saucers full of water for more than 5 minutes. Drain off excess wet.
• Place plants in sunlight or potent artificial light to help them dry out.
• If you see whatsoever mold, have the institute exterior for a day to expose information technology to natural light and air. When you bring information technology back in, choose a new abode for the plant in a spot that is slightly more sunny and breezy.
• You might likewise consider transplanting to a larger pot total of fresh dirt. Make sure you choose a pot with plenty of drainage holes.

Is It Safe to Use a Pocketbook of Old, Moldy Potting Soil?

Sometimes, you may not apply all the potting soil at once; later, when you become to utilise some more, yous discover that fuzzy white stuff has bloomed inside the bag. It might too exist that yous purchase a new pocketbook of potting soil, bring information technology home, and find the same thing. The question is, tin can you still use that soil?

• If y'all are transplanting, planting, or merely replenishing dirt levels, the respond is yes. Before you use it, merely mix upwards the contents of the bag and piece of work the white stuff back in with the dark. You might also add a little fresh compost. Cut the bag open and leave it outside, exposed to the lord's day and air, for a day or two, turning occasionally. Yous could also mix in some fresh compost.
• On the other hand, if you're planning to sow seeds, you should not use that soil. Since the mold volition compete with the seedlings for nutrients, it's all-time to give the new plants a fighting chance in some fresh dirt.

Is the White Stuff Growing in Your Potted Plants Dangerous to Humans?

If nosotros see mold, most of united states react by covering our mouths and running the other direction. Merely, although about mold-removal companies volition try to persuade you otherwise, the mold in your potted plants is not particularly dangerous to humans.

On the other hand, if you are extremely sensitive to mold allergies, you might non want to take whatever risks. Some people accept claimed that the spores trigger allergic reactions.

Outdoor container plants are less probable to grow mold, but it does happen. The constitute likely needs less water and more sunday and wind.

Photo By: Thomas Pix

How to Preclude Mold From Growing in Soil

Mold tin can never be totally eliminated. The truth is that mold spores are a regular function of soil and are usually harmless. The existent threats to your plant are heat, humidity, and low ventilation. Under these conditions, mold spores grow into their adult fungi form and release fifty-fifty more spores. Indoor planters and container gardens are mutual hosts, as they retain more than moisture. To prevent mold growth, follow the simple steps below:

Read More From Dengarden

1. Don't Overwater. Overwatering is the main crusade of mold growth in container plants. Soil that is constantly moist is much more likely to harbor happy spores. Water only after a quarter of the pot's total soil volume has dried out. For example, if your plant's soil is 8" deep, don't h2o it until the height 2" accept dried out. For most indoor plants, watering once a week should be sufficient.
2. Reduce Humidity & Increase Ventilation. Together, these two weather create the stale environment in which mold thrives. Past already not overwatering, you're also reducing the humidity, and so to reduce moisture even further, place your plants in sunnier, well-ventilated areas or use a minor fan to constantly push new air around the soil.

Final Word

Overall, mold in potting soil is very like shooting fish in a barrel to treat. My one word of advice is to avert the employ of vinegar. Mold can survive the acidity, only your constitute's roots may non! Cinnamon is a much safer and effective choice.

Comments, questions, and suggestions are always appreciated!

This content is accurate and true to the best of the author's knowledge and is not meant to substitute for formal and individualized advice from a qualified professional person.

© 2022 Zach

Alexandre on April xxx, 2020:

Very helpful explanations and tips, cheers

Anna Rose Wilson on January 16, 2020:

Excellent advice, thank you!

Rhonda on January 08, 2020:

OMG!! Thank Y'all SOOO MUCH! I Honey ALL MY PLANTS AND DURUNG THE Wintertime I BROUGHT A MAJORITY OF THEM INSIDE.. CHECKED ON THEM IN 3-5 DAYS AND TGE BEGAN TO HAVE MOLD IN Dirt!

IVE TRYED TO HAVE THE WINDOW Open, Afterward I WATER THEM, PUTTING THE OUTSIDE. GOID TO KNOW WHAT IM DOING Incorrect!

Martha on Nov 08, 2019:

Thank you lot for your communication! I have an orange tree that developed white powdery stuff on the surface of the soil, when I brought information technology into the business firm for the Wintertime. I placed the orange tree in front end of a large window facing West, in the bathroom. Perhaps the moisture in the bathroom is afecting the tree and caused the white pulverization on top of the soil.

I followed your communication. I wore a mask, removed the white powdery stuff with a plastic bag, as well as some of the soil and disposed of it. I and so sprinkled a thin layer of cinnamon powder on top of the soil. I will also exist moving the tree to a south window location, where it will be getting more sun light.The leaves are turning yellow, is in that location anything I can practice to prevent the leaves from turning yellowish? Thank you so much for your advice! Martha

Olivia on May xx, 2019:

Thank you for the informative data regarding how to treat mold.

Laura on December 30, 2018:

Very informative! Thanks..... I have some mold on the dirt of my indoor herb garden. Will the herbs be safe to swallow?

Crystal on Nov 06, 2018:

I was worried that I would have to trash my umbrella found. Because of this white hirsuite stuff on the soil and stem. My only concern is will this result my other plants?

Aurora on Oct xiv, 2018:

Hullo! my proper name is Aurora and I'grand doing a science off-white project on household items you can kill mold with, that won't impairment your constitute. I know you suggest to not use vinegar, but since it'southward a science fair project, I need to show it anyways. Thank you for making this post. It's helped me with my enquiry!

Joyce on Oct 08, 2018:

Thanks for clear and exact directions and information. I feel confident that your suggestions volition save my orchids.

Zach (author) from Colorado on October 03, 2018:

Y'all're welcome! Hope the info helps out your fern!

Stephanie on September 29, 2018:

Wow! thanks for all that info! I have indoor fern plants and One is completely over growing and the other isn't looking then practiced. moldy and very skimpy. ( i will take it outside for natural sunlight and take it from there!

Zach (author) from Colorado on September 28, 2018:

Give thanks you!

Elizabeth on September 21, 2018:

Your information was and is awesome, since I did take a situation with mold. My husband said we had to replant them all. I was non to happy. MY friends has them now. Whether I will get any dorsum is to be determined. Peachy postal service Give thanks Yous

Joshua Kempe on May xiii, 2018:

I'm using Neem Oil and is Cinnamon better than Neem Oil? I got mold on my plants about a week ago and I made the mistake of not scooping out the existing mold and just sprayed information technology and the mold has not died yet... I'm really worried. I don't desire moldy stuff in my flat either and the neem oil really smells bad too. :(

Ellen Mae on March 29, 2018:

Thanks for the bang-up tips!! Happy Spring

Fayehanson on Dec 31, 2017:

What is the xanthous crusty stuff on my plants pot?

Patty pink on November 19, 2017:

Good to know these things!

Trish B on September 07, 2017:

Cheers, I know what i'm doing wrong now and how to correct it.

Many thank you

Isabelle on September 03, 2017:

Hello! Thank you lot for this helpful data! I have a question I promise you tin can help with. One of my potted plants got infested with mold, I planted 2 kinds of basil. Ane of the basil plants was basically dead while the other seems to be fine. I desire to replant the basil that is ok with a new basil constitute, new soil and all. Using your cinnamon trick on the basil that was with the infected soil, would it be safe to have in the new pot with the new basil plant? Or should I have two split planters?

Alexi on August 24, 2017:

Non only did this solve my mold trouble, but finally my "allergies" from the past few days make sense! I had forgotten about airborne mold spores... ._.

David on August 05, 2017:

thanks for the advice

Sandra on July 29, 2017:

Zach, I am glad I institute your site. I will try the cinnamon handling on my moldy plants. Thank you lot for the information!

Margaret Hicks on May 15, 2017:

Hello, I alive in an apartment on the second floor and really don't think that I accept whatever light coming in the window and don't want to take a take chances and put it outside with the kids or someone may steal information technology, and I'thousand not sure what role of the solar day there would exist any kind of sunlight on the balcony (if any). Is information technology possible I could put information technology nether a desk lamp that uses a 15 watt lamp (perchance a florescent bulb as it is a long bulb, not sure).

Rusti on Apr 09, 2017:

Thank you lot! Easy to read and understand information, fast service. Loved this site!

Sabrina on April 08, 2017:

Thank you so much for all the information!

I got a whole planter with spinach full of hirsuite white mold, I'grand trying this!

Linda Matz on April 02, 2017:

I call up I am going to actually like this site!

Li on March 14, 2017:

Volition attempt this

Thanks

Ryan on March 04, 2017:

My soil isnt moldy, but information technology has some kind of slimy substance on it. Any idea what it might be?

Michele on February 01, 2017:

Thanks for the tip about Cinnamon, I'll definitely effort this. I accept several Anthurium potted plants side by side and only 1 displayed wispy white strings on the soil, which I figured were spiders, so sprinkled heavily with Orange and Lemon peel (Spice Earth). one week later, the entire height is looking more like mold. The are in bright light but not sun which will burn down the establish, I accept a TheraPure increasing ventilation and they look extremely healthy with lots of blooms. Does this sound like mold? What else can I exercise?

Patricia Branagan Cannock staffs on December 20, 2016:

I had a new plant final week for a Christmas present( a Poinsettia) inside days all the leaves dropped off, and the soil is already mouldy, does this mean than information technology was stored in the incorrect conditions in the store. I will endeavour your remedy. Thanks

Betsy Bowen on Nov 22, 2016:

Our house cleaner told u.s.a. that there was white mold on our orchid plant, and so we took it out side and threw all the old dirt and mold abroad. Gave it a expert new supply of Miracle Grow, cleaned the pot, washed the roots of the plant and repotted it calculation the ground cinammon. My housecleaner saw information technology today and suggested I ask Google what to do. What did nosotros practise wrong that made the mold testify upwards over again. We water information technology from the common cold water at the kitchen sink equally we exercise the other plants and they do not take the white mold. This plant was given to me by my best friend who passed away in June and I do and so want to go on information technology condom and flowering. Cheers for your info.

Betsy Bowen at betsybow77@gmail.com

constance on November 13, 2016:

i keep my organic potting soil in a tub with a lid and now everytime i open it the whole summit is covered in white fuzzy mold. this has never happened to me earlier. will the cinnamon work in this condition and should i dispose of soil or remove mold and continue?

Susan Johnson on October 25, 2016:

I love different ideas on how to take care of life with household products that are all natural I do accept a question how often should nosotros put the cinnamon in our plants once a month?

Susan Johnson on October 25, 2016:

Thank you so much I also knew this trip and my plants are growing beautifully now!!!! keep sharing!!!!

Ella on October 17, 2016:

This was very helpful! I am going to try the cinnamon trick, only another trouble I am having is the mold is growing on the actual pot. Would this also be due to ventilation/lack of light? What kind of bogus low-cal would exist helpful?

David O on September 01, 2016:

Cinnamon did Not work for me

Clara on August 03, 2016:

I put a fair amount of cinnamon on the earth of my large foliage plant was give to me when I lost my husband so don't know what it is called but it did take big cup size white flowers but I have transplanted information technology with the all-time earth and I watered it every ii weeks now I am wondering if I tin can water over meridian of the Cimmon and how often should I water this plant ?

1000 on July 10, 2016:

Would irradiated cinnamon work?

Kathy on July 03, 2016:

Comment...I would similar to know the cause of a powdery substance (from Flowers)

on my peace lily houseplant.mmIt also has a grayish moving-picture show around the plant at base of potted

Constitute. Are the two symptoms connected to the same trouble? Also the lilies accept chocolate-brown

colored spots on them that have worsened and turned a darker brown with larger spots.

I have cut these flowers off along with the long stem. SOS hither..I hate to lose this constitute!!

I will try the Cinnamon treatment you take suggested andTHANKYOU!!

Sharinhall@yahoo.com on May 26, 2014:

What if you have brownish orange mold in your soil? Information technology turns to powder wen u affect information technology. Will cinnamon work on this too?

Jaimie G. on November 17, 2013:

I had heard that using a splash of sprite in your house plants helped with the growth, considering of the sugars and such! Well, since I accept done this, I at present accept white furry mold growing on the plants and they are looking VERY unhealthy!!! HELP!!!!

Zach (author) from Colorado on March 24, 2013:

Virginia - Yes, you can sprinkle the cinnamon over the soil even if your plants accept already been watered. Just programme on letting the soil dry out a bit earlier y'all water again.

Virginia on March 23, 2013:

I will be trying the cinnamon! I also want to know tin y'all still sprinkle it even if you have already wartered your plants?

anne arsenault on February 03, 2013:

about of my plants have mold thank you I will try cinnamon hope it works

I never new what caused the mold thanks hope it works.

rbm on October 07, 2012:

Great tip, will definitely requite this a attempt. Who knew that cinnamon could be used to get rid of mold! Pretty interesting.

Good hub, voted upwardly and useful.

Zach (author) from Colorado on October 01, 2012:

Since the mold typically only affects the soil, the green onions should exist simply fine to eat.

Amanda on October 01, 2012:

Hi,

I've got furry white mold growing in my potted green onion's soil. Is it safe to nonetheless eat the onions later on the mold is removed?? Thanks.

Jason Menayan from San Francisco on April 03, 2012:

I have this trouble and ironically found your Hub via Google! I scraped the mold off, sprinkled a generous corporeality of cinnamon, and am waiting to see if information technology did the flim-flam!

Zach (writer) from Colorado on Feb 04, 2012:

@Elke - I'chiliad not very familiar with Coin Tree plants, nor is it piece of cake to make a diagnosis without seeing the actual plant, but it seems to me y'all are correct. The white mold on the soil volition virtually definitely affect new growth earlier the older established leaves. Along with the cinnamon, try to get a low-cal/rut source that will dry the top layer of soil out a fiddling quicker

Elke on February 03, 2012:

I'll try the cinnamon approach. I have a "Coin Tree" constitute. The new growth reaches a certain point, then withers and dies. The mature leaves seem unaffected so far, only I arraign the white moldy film on height of the soil for the stunted growth of the baby leaves. Am I right?

Zach (author) from Colorado on January 26, 2012:

nifwlseirff - That yous must! Cinnamon works great and can also be used in other areas of the garden too! If your plants show foliage signs of powdery mildew, cinnamon tin can be used as a spray to control it. I wish yous the all-time of luck.

phoenix2327 - Hi again! The gardening issues is definitely running wild. As far equally I tin can recollect, Moss grows on soil because of moist and acidic conditions. I would recommend physically removing the moss and and so sprinkling a little woods ash over the treated areas. The ash volition make the pH swing up simply enough to discourage future moss growth. Hope it helps you out.

Lissie Loomes - Glad I could show yous something new! You'll exist amazed at how well information technology works.

Lissie Loomes from Tasmania, Australia on Jan 25, 2012:

Thanks Joe for the cinnamon tip - hadn't heard it before but will certainly endeavour it on my indoor garden when necessary.

Zulma Burgos-Dudgeon from Britain on January 25, 2012:

You hubs are well timed as my mind is turning to a bit of gardening this weekend. I'm wondering if yous might take any tips as to moss growing on peak of the soil. Have shared this on Twitter and FB.

Kymberly Fergusson from Federal republic of germany on Jan 25, 2012:

I must effort cinnamon! I've been plagued with a little white 'film' on my potted plants' soil for months, which apace grew dorsum when the surface was scraped off. Thank y'all!

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Source: https://dengarden.com/gardening/Moldy-Potting-Soil

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