Hi all, I need some help with a diagnosis. I’m a first time grower doing GDP auto. I am using 50%coco loco and 50%happy frog soil. I added a handful of some organic slow release fertilizer. I used no added nutrients for first four weeks and then started once a week 1/2 teaspoon of FF grow big and 1/2 teaspoon of FF big bloom. Using pH down to get my water to about 5.9. I was originally growing her in the window with a cheapo stand light but recently got a spider farmer se3000 in a tent at 80%. She’s yellowing and curling, both of which accelerated/worsened after putting her under the light. She is also much more fragrant now. It looks like N toxicity but I’m not using much nuts at all. Can you tell me if this is light stress or N toxicity? Please help!
How are your leaves usually sitting, flat, down or angled up a bit? If they’re ususally flat they like the light and upwards they could use more, then I would say nute burn.
Thank you so much for the tip. So before i put them under the new light they were angling up, now more flat. The yellowing tips increased after I put them in the tent. I don’t want to do anything at this point to stress her more. I have her on a 20-4 light dark cycle and as you can see here there is some yellowing at the lower levels which makes me think nute burn but as a newbie I just don’t know and am worried that if I flush I may mess it up worse.
Youre welcome, and I was just looking at the leaf charts and pH charts. At that low pH you’re unlikely to uptake too much nitrogen. But you could get a potassium uptake problem at a low pH. That can resemble light burn, can have yellowing margins (edges) with tips.
I would treat that like soil not coco. At that ratio the coco is acting more like a substitute for peat moss, holding moisture and soil conditioning.
Common mixes I see around here are coco with something for drainage and heavy on nutes, or soil with just about any amendment to improve the soil conditions.
OK, so sounds then like this is a nute issue and the solution may be to flush and then wait and see?
And possibly take the PH to 6.3ish with the water?
Yeah nute things. But about the flush, I’m not too experienced with flushing and refeeding so I dunno man. I don’t think it’s sick enough to flush.
I def would give higher pH water, feedings or whatever.
Thanks, I think I am going to just stop the nutes and PH down right now and give her some time. You’ve been very helpful.
You’re welcome your plant is looking very healthy besides. Good goin my friend
@Jaysittinback hit the nail on the head. Thats very light nutrient burn.
Better lighting equals more photosynthesis. More photosynthesis means higher nutrient use. Higher nutrient usage burnd the tips, but not excessively.
Water only for the next couple of feeds will straighten her out
I’m using humbolt mendo mix which is similar to what you mixed. pH it to 6.3 and see if that improves anything. It did for me. At 5.9 pH my plants were weak celled. 6.3 hardened them up.
Thank you guys so much for the advice…as a first time grower it feels like first time with kids, every little thing concerns you lol. Anyway, it’s nice to hear from people who have been there and done it before. Calms the nerves.
Ok so out of the frying pan into the fryer. ILGM auto GDP. I stopped all nutes and only watered. Added an inline exhaust fan and a small oscillating fan into the tent. I came home about three days ago to pronounced drooping of the top leafs. Some research suggested over watering but I only water like every 2-3 days. I skipped a watering but yesterday I checked on the plant, no improvement and the thing was bone dry so I watered. My concern now is I either watered to much and gave myself root rot or the thing is root bound. It’s auto flower in a 5 gallon breathable grow bag so I thought it would be rare to have either issue. What else could that be?
If it’s helpful it is also in full flower right now
Autoflower is a 5 gall bag? She wont rootbound.
Cant get rootrot that fast neither. That typically happens if you water everyday for like a week straight. Never allowing it to dry out. Overwatering isnt too much water, its water too frequently.
Same plant from the original post? 8 days ago and full flower? Can I see a new picture?
I will post a picture when I get home, but yes, same plant. Just much sadder now and no longer “praying”
Your original issue was light burn. Lower light intensity or raise the light. In flower you want to follow the feed schedule to a Tee don’t skimp out with the feed. Autos take the same nutes as photos. Make full strength nutes and dilute it down a bit but not like half or nothing. 900-1000ppm every time you feed. Stay with whatever watering routine that keeps your plants healthy.
Its taking off, and like @Bluntsmoke says regular feeding for flowering. I say also calmag or equivlent, even fed they like extra.
Your soil will run out of organic matter a little faster than others, it’s half / half