Serious Problem - Plants Not Growing

So, I have a serious problem with my little clones.

They're about three weeks old (and another batch is one week old), but they're still tiny.

They're also yellowing and some of them are outright dying.

I've fed them Lucas and 20-20-20. I've given them magnesium, but nothing can explain this.

I think it has something to do with the roots, because when I water them they fall down, like the roots haven't taken ground or haven't become strong enough.

I've checked for root rot and aphids but there's none of that.

I simply can't figure out what is wrong with these plants.. they're usually a little yellow when planted, but these guys are just dying..

pH is always 6.5-6.8, AFAIK. I'll be buying a second pH pen to confirm.

Temps are 23-28C. 24/0.





Thanks!roll

Just leave them be, give them water (no more nutes) and see how they respond. Sounds like you have been pulling them up to check on the roots, best to not disturb them and further stress them. Also add more dirt around the stem if they arent sturdy

Two things what you spraying on them, what's the soil

ummm.. Ph?

Possibly over feeding them? Possibly low or high ️ph. Looks like calciummag deff. But don't take my word for thag

What is that medium, its not working. Ph is out and is causing the plant to be def in some areas and burnt in others. Major K def going on here.

Take them out of that pot, roll off the dirt, and rinse off the roots with luke warm water very gently of course and go get yourself some organic soil and put them in that soil gently. Water them and don't touch them for 2 weeks.