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How do I prevent mold & algae on seedlings?
How do I prevent mold & algae on seedlings?

If the medium is too wet or bright, or if media is infected before use, algae and mold can become a problem.

Amy Storey avatar
Written by Amy Storey
Updated over a week ago

How to Prevent Mold & Algae on Seedlings

Mold and algae can smother seedlings and encourage even more disease. The best things that growers can do to avoid this problem is to control light and use sterilized media.

If the problem persists after preventative measures are taken, growers may spray seedlings with a mild hydrogen peroxide solution. (1 Tbsp to 1 gal water) 

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