Can anyone tell me what this might be? Im starting to see it on all my seedlings now? Any ideas? Thanks
Can you show some pics from the top? Are the newest leaves having spots near the tips, between the veins?
Looks like the it might of had a bit of a calcium deficiency earlier, but it’s recovering well. The tips of the serrations are looking bit brown/white - those are the early signs. I think you’re in good shape now.
Thank you for your reply. I use RO water and Jacks nutes almost since they sprouted. They looked awesome until the last 3 days ago when I noticed the leaf damage. Now this morning the leaves are curling down.
I run Jack’s as well. A little Cal/mag to bring the RO water up to 200ppm before adding the nutrients helps a lot. Could also make your ratio of Cal-Nit a bit higher than the part A. How’s your pH? With RO mine always swings quite a bit, so I started to add a bit of tap water to buffer pH.
Ok think I found the problem! I kept checking my PH and everything seemed ok. I then tried to calibrate the ph pen and I couldn’t get it to work so I went and got a new ph pen. I then checked my levels and it was way off. So no doubt it was a nute lock. Plants watered today with Jacks and a proper PH. Should see results pretty quick!
devjyarn thank you for all your help. Much appreciated.