this post was submitted on 21 Sep 2025
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Hydroponics

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Struggling with Seed Germination in Rockwool - Drowning Issues (lemmy.zip)
submitted 6 months ago by original_reader@lemmy.zip to c/hydroponics@slrpnk.net
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I've been germinating seeds in rockwool cubes and while they sprout just fine, they consistently end up drowning after a while. I struggle to managing the water balance correctly - they're either too dry or too wet. I am currently in a dry climate.

Has anyone else dealt with this? Any tips on how to maintain the right moisture level?

Would love to hear what’s worked for others using rockwool (or anyrhing else, really) for germination.

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[–] papertowels@mander.xyz 2 points 6 months ago* (last edited 6 months ago) (1 children)

So I've always used a seedling starter tray like this, which worked for me.

In your case, I wonder if adding some wicking material for each cell would help prevent dry out?

EDIT: I think one thing to also try is to cover the ice cube tray with clear plastic. All the seedling trays I've seen come with a clear plastic cover with a vent, which helps to recapture moisture.

[–] original_reader@lemmy.zip 2 points 6 months ago

Thanks for the tip. Am looking for some plastic dome. Maybe this large plastic water bottle will see another purpose after all. 🙂