Lockout from too much fert in the soil. Classic to see both tipburn and N def on the same plant. Too much of one thing and too little of another lol. Imbalance. The salt buildup in your soil making the roots unable to selectively transport certain ions across a membrane.

I'm stoned. I need to go to bed with a pile of comic books and a hot cocoa. G'night.
stinkyattic Reviewed by stinkyattic on . Someone please confirm my hypothesis: My plants started off green and vibrant. Then: -I noticed grey tips on the bottom leaves which turned yellow plus twisty bottom leaves -After the yellow they (the tips) turned brown -After the brown tips the whole leaf started yellowing -So I flushed and left it for a day -The day after I flushed again with pH'd water (1gallon; container is 14oz.)and immediately nuted with pH'd nutes (you know, like i add the nutes then ph the water) with recommended dosage for seedlings -Now the Rating: 5