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Beginner Gardening: White "growth" on seedling soil, 1 by Elijablue

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Subject: White "growth" on seedling soil

Forum: Beginner Gardening

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Photo of White "growth" on seedling soil
Elijablue wrote:
I've noticed some type of white growth on the soil of my seedlings - see picture attached. I have kept them on the dry side, to prevent dampening off, and water from the bottom. The lights are on for 16 hours/day. I also have an oscillating fan on for about 12 hours per day. Does anyone know what this is? At the moment, it does not seem to be affecting my seedlings.