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09-29-2009, 01:49 AM #4Senior Member
Green veins, yellow patches between veins?
Well, operator error doesn't show up immediately in soil (as opposed to coco, hydro, etc.) so what you're seeing was caused by conditions a few days ago.
Whatever yellowing, splotches, etc. you've got going are probably not gonna heal. When you get things right, the new growth will be good, though.
I really can't see in those pics well enough to make a call, but why bother? You've got a few things you know need correcting (pH, nutes, maybe pot size) and any of them could have caused you problems.
Soil: Seedlings don't need nutes, the seed provides it. Usually stuff called "potting soil" is what you want, just peat with maybe some perlite, etc. but no nutes. I've never used the MG you mention. But ferted soil with extra nutes--ouch! Your seedlings' roots are gonna look like Oldmac gave 'em a bad perm.
Small containers: When that cup dries out a bit (which it's supposed to do between waterings), the concentration of your nutes can increase dramatically as the liquid volume decreases. Use LIGHT ferts. It's a weed.
Do you know how to tap a plant out of its cup without destroying the roots? That's the first thing I'd do. If it looks rootbound, move to a 1gal container with 1" of stones in the bottom (more if your soil doesn't drain well). Water well, measuring the runoff pH, and get that stabilized in the correct range. If it's that MG ferted soil you probably don't want added nutes at this time. Depends on how fast they're released in that soil. :what:
So, my answer is: I don't know which condition(s) are causing your problem. But if you transplant (if needed) and flush, and maintain proper pH and nutrient levels, you'll eliminate some obvious possibilities which will need to be fixed eventually, anyway. :thumbsup:
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