Pro Active

With only a couple of harvests under my belt I'm trying to be as pro active as possible this time out. So I'm reaching out for help on this one. I have 2 super silver haze seedlings in 1-gallon pots with a coco and perlite mix. My girls look a little off to me (see photos). They both look a little light in color and I can see some brown tips on some leaves. Using DaKine base, grow, & calmag with silica and mammoth P. The feed going in was PPM-607, EC-1.2, pH-6.1 right where the feed chart says you're supposed to be. The outflow PPM-707 & EC- 1.5 were a little high though, pH was 6.0.
My first thought is nute burn, but the plants aren't even 10 days old and have only been fed twice. So I don't know. Anyway, anybody have any idea whats causing these issues?

You're overfeeding a tiny seedling.
At no time would I ever feed a tiny seedling all those nutes at 1.2ec.
Why are you using calmag? Are you running ro?

Using calmag because thats what the feed chart calls for. Yes I'm using RO.
Probably am over feeding. Thanks.

So, even with coco/perlite, they can be overwatered in a large container at first. If these were in solo cups, you might not see any problems, but 1 gal containers take a long time to dry out when they aren't full of roots. 1.2 EC is also a bit high-starting seedlings are fine at .8, but your main issue is overwatering for the size of container. Let that container dry out a bit so the roots can recover and start filling it out, and next time you feed, I suggest lowering the EC a bit and get lots of runoff to flush out those excess salts.

Should I flush before lowering EC or just lower the EC?

Mag11 said:

Should I flush before lowering EC or just lower the EC?

Click to expand...

Use the lower EC feed as the flush just make sure you get at least 20% runoff to push out the old salts that have built up from the heavy feed. Check EC of runoff and try to keep it within +300 ppm of the in going feed ppm. They should recover just fine

Got it, thanks!