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The clones were clipped from a friend's motherplant.
The medium is rapid rooter, and the pH is approximately 6 (only have color-changing pH kit, no digital tester). They aren't soaking wet, they are watered only when the cubes are (fairly) dry.
I scrapped a few of the smaller, sicker, mold-stricken ones and checked for rooting. They all lacked roots, excepting one which had only a single rootlet. They have been in for 2 weeks.
We're using a 2-foot 24watt T5 HO 6500K blue fixture with 4 bulbs. As of now, the clones are probably 18 inches from the light.
We also have some seedlings in the same box (we're cloning and doing seedlings in a big cedar armoire.), is that ok to do?
*sigh*, they make it seem so easy when you first start out! Guess that's the old learning curve.
I lost one that when I looked it had one 1/2" root but it didn't take. Rockwool cube. Have you tried the dome? 99% success ain't bad. And I have 9 under a two bulb 24" doing fine with two seedlings. Move the light to at least 6" or somewhat closer. I have it close to mine right now within 2". :thumbsup: