Serious leaf curl on only fan leaves

That doesn't look like any Mg- I've seen, and I've never pushed Ca so far that it causes a toxicity. I'm thinking it's a P uptake/utilization problem. Have you examined the roots of these three out of 200?

Seamaiden said:

That doesn't look like any Mg- I've seen, and I've never pushed Ca so far that it causes a toxicity. I'm thinking it's a P uptake/utilization problem. Have you examined the roots of these three out of 200?

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Yes 2 days ago when I transplanted. Plants were wet and then I had to water them when transplanted so they became a little overwatered. Been using 6.0 ph. 75f 75rh. 50/50 coco/ perlite. Teas. Seaweed. 6/9 micro/bloom at half strength.

I never see a cal def but always a mag def in coco. Not nearly as bad as when I started with fresh coco. This time I reused it an should have supplemented just mag with Epsom and not calmag. I use citric acid for ph down for better P solubility. What would lock out P?

You know, I can't answer that question, but I do know that P and K being off can affect Ca. Have you taken a look at my charts (linked via sig line)?

It's REALLY strange that only 3 are doing this out of 200. For some reason now I'm thinking about Star Trek Voyager. Fucking ADD. Where were we? K and P in relation to Ca and Mg. It's a balancing game that I have problems calculating mathematically.

How were they looking at transplant? If you're using MgSO4 for the Mg then it'll basically rinse out if you give a few low EC flushes. I love Fox Farms Big Bloom for that, but the teas you're using would also probably be very good for that.

I've gotta admit, it's odd. Maybe there was a glob of something in that particular little patch of coir that they got...?