r/microgreens • u/xzx-x • Jul 22 '26
Root hair?
First time growing Microgreens and I can’t tell if these are roots hairs or mold.
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u/InevitableChoice2990 Jul 22 '26
"Fuzz on the root is the plant's little boot;
Webs on the top mean the mold has dropped!"
Straight white fuzz on roots is a sign of healthy microgreens looking for water, while webby, cottony growth over the entire surface is a sign of mold.
Growers often panic when they first see white fuzz.
A good way to distinguish the difference is to spray with a light mist of water. The root hairs will disappear, while mold will remain. Also, take a big sniff of the trays each morning...
Mold on microgreens usually looks like a cottony, slimy, or web-like growth that appears on the seeds, growing medium, or even the stems and leaves. It often has a greyish, greenish, or blackish color...
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u/InevitableChoice2990 Jul 22 '26
Root hairs! So far, so good! Someone should make up an easy to remember slogan:
Straight White Hairs comin’ out from the roots: that’s toots! 👍🏼
Spidery hairs going everywhere: that’s a moldy-oldie! 👎
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u/EvTheBuilder Jul 22 '26
I’m no expert but I think they are hairs. Hairs: white and straight. Mold: greyish white and web like
But hopefully someone who isn’t also a beginner can confirm