Strange fungus/mold with picture this time!

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Shanny87 Edmonton, Canada Apr 01, 2013

Hi everyone,
I am trying to identify what this is growing on my soil (see picture). I have tried the cinnamon remedy with no success, I removed the top layer of soil and replaced it with new stuff only for it to come back a day after watering. I sterilized the potting soil in the microwave prior to planting and I only water when the soil is completely dried out. 50% of my plants have this. These plants were started from seed and are indoors under lights until I can plant them outside. The plants themselves are thriving and seem very healthy. Any ideas or advice? Will it harm plants in the long term, specifically peppers and tomatoes?

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gasrocks Portage, WI(Zone 5a) Apr 01, 2013

Have you tired a fungicide spray?

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themoonhowl Prairieville, LA(Zone 9a) Apr 01, 2013

It really sounds like your soil is staying too moist. It is best to allow the soil to become almost dry between waterings, This seems to be the case as you say it shows up again after watering. Make sure you have good drainage and air circulation for your potted plants and that they are getting enough light. Sometimes the addition of perlite to the mix helps with drainage. As long as the mold is confined to the soil, it should not be harmful to your plants, but could indicate other issues that may be harmful to the plants.

"A white or yellowish substance on the surface of the soil of a potted plant is saprophytic soil fungus, a mold that feeds on decaying matter in the soil. While it is most often noticed on houseplant soil, it may also grow inside bags of potting soil you have stored in a damp area or an unsealed bag. The mold rarely poses a danger to the plants, but it is unattractive and its presence indicates other issues with the soil that may harm the plant or plants grown in the soil if not treated."

Read more: How to Get Rid of Mold in Potting Soil | Garden Guides http://www.gardenguides.com/82679-rid-mold-potting-soil.html#ixzz2PEtOvVgb

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