Yellow tips and taco leaves

[MJMcSkunky]

Hi guys! First timer here and can see I’m not the only one. Haven’t had much issues except for stretching at the beginning with some stretching do to a under powered LED.

My one survivor after switching to flowering (3 out of 4 male) is doing pretty good until now. “Judy stench” is off in her own room and been having issues with yellow tips, curved or cupped leaves, and rippled “up” leaves. Also some blotchy and lost leaf tips on the lower bigger fans. Defoliated (lollipoped) last time week 3 of flowering, and this came on a week later.

In week 4 now of flowering and lower bud tips are starting to turn brown on tops as well (normal?)

setup
corner of room with Mylar surrounding. 6- 75w “soft white” sylvanian CFL bulbs (2 on top, 2 on each side) yes it’s a first timer setup lol BUT she is budding well

foxfarm trio for nutrients twice a week on 12 week feeding schedule ph 6.5-6.8 on her regular water which she drinks dry everyday. So at watering in small amounts everyday

heat has been 78-80 unfortunately but have been able to keep humidity at or between 50-60 with the exception of a few recent days.

Is it light stress possibly? Nutrient deficiency? Have read in the forums that it’s hard to light stress with CFLS? Any help appreciated and thank you to everyone here on groweasy for the excellent forums and help!

[9fingerleafs]

the plant looks great, i see no issue

[D.A.A.S.69]

Looks fine to me too!! Your doing great ,keep it up.

[az2000]

curved or cupped leaves, and rippled “up” leaves. Also some blotchy and lost leaf tips on the lower bigger fans. Defoliated (lollipoped) last time week 3 of flowering, and this came on a week later.

I agree that they look good. But, when I get that (at that stage of early flower), I supplement a tiny amount of epsom salt (mg and sulfur). Maybe 20-30ppm added to the nutrient solution, depending n the plant's size. (Just a few grains. Not like treating a real deficiency. I spinkle a few in, stir, measure the ppm to see how it changed. I go slow raising it a little at a time. Once you know how much to use, you don't have to be as careful.). It often seems to help.

However, you mentioned defoliating. IMO, that can bring an overfeeding problem, exacerbate salt buildup in the soil. The plant uses light to drive it to take up nutrients in the soil. Removing leaves is like removing light. If it takes up less nutrients as a result, that can tip the scales of salt buildup. I.e., salt buildup is common at that stage of flower. If it was already happening (but not enough to be visible as symptoms), the plant taking up less nutrients (due to receiving less light from fewer leaves) would lead to it building up even more (acidfying further, making nutrients less available, which will add to them being more excessive in the soil).

Not trying to scare you. Just saying: if you tried the epsom salt idea, I'd reduce your nutrient strength a little. Adding ppms would be the wrong thing to do if buildup were occurring that way.

If you keep an eye on your runoff ppms, that can be a canary in the cage for salt buildup. It's not something I'd act upon with just one measurement. But, if you monitored it from veg, it can be useful seeing trends. (If my theory about defoliating is correct, you would have seen it go up at that time.).

[MJMcSkunky]

Thanks for all the advice guys! Finally got temps closer to 70 today’s and she seems to be doing better. Bud are building like crazy! Thanks for the advice az. I’ll test my runoff today after watering and see where I’m at. Here’s a pic today