This is driving me crazy!

[thelwall]

Yo! Good people of rollitup. I have lurked and learned so much from y'all, and I wouldnt be wasting any readers' time with my problems unless I was as as stumped as I am right now.

My girls:

2 AK47 clones, from pro greenhouse stock.

1 - the problem gal - is in NFT, under a 250w hps while vegging.
Temps - 65-75F, 24/7.
Nutes - AN Sensi grow A+B (also keeps pH around 5.8-6.1, 24/7) mixed in RO water. EC is running at a steady 1.1 - 1.2. Haven't seen any nute burn.
I have tried a few foliar feeds with a 0.5ec mix, to see fi ican get any deicienccies straight to those leaves, but it hasn't made any difference.
The lamp is in a cooltube; air extraction and intake are fine. The tube is around 8-10" from the tips of the plant.
She gets 5ml/10l of H202 every day too.

(2 - her twin sister - is in bog standard compost. She was my clone mother, but I stuck her under the scrog screen a few days ago because she's looking fine, and because I will be switching strains next grow anyway.)

Anyway - problem gal: first, her leaf edges curl up, usually on older leaves. Then the older leaves develop rusty spots, then they dry out, then they die. New growth, while slower than I would expect to appear, is nice and green. She hasn't put out many roots, I don't think, although her roots are growing ever day. Some pics attached. I have thought and thought about this - does anyone have any ideas?

Basically - this doesn't tally, as far as I can tell, with any of the sick plant diagnoses on the very helpful threads elsewhere in this forum (if it did i wouldn't be troubling you folks).

Here are some pics.



I promise to beam waves of good karma to any responders from my very own frontal lobes.

Peace.

 

[chairroller]

Heat problem reduce it !!

 

[chairroller]

Yo! Good people of rollitup. I have lurked and learned so much from y'all, and I wouldnt be wasting any readers' time with my problems unless I was as as stumped as I am right now.

My girls:

2 AK47 clones, from pro greenhouse stock.

1 - the problem gal - is in NFT, under a 250w hps while vegging.
Temps - 65-75F, 24/7.
Nutes - AN Sensi grow A+B (also keeps pH around 5.8-6.1, 24/7) mixed in RO water. EC is running at a steady 1.1 - 1.2. Haven't seen any nute burn.
I have tried a few foliar feeds with a 0.5ec mix, to see fi ican get any deicienccies straight to those leaves, but it hasn't made any difference.
The lamp is in a cooltube; air extraction and intake are fine. The tube is around 8-10" from the tips of the plant.
She gets 5ml/10l of H202 every day too.

(2 - her twin sister - is in bog standard compost. She was my clone mother, but I stuck her under the scrog screen a few days ago because she's looking fine, and because I will be switching strains next grow anyway.)

Anyway - problem gal: first, her leaf edges curl up, usually on older leaves. Then the older leaves develop rusty spots, then they dry out, then they die. New growth, while slower than I would expect to appear, is nice and green. She hasn't put out many roots, I don't think, although her roots are growing ever day. Some pics attached. I have thought and thought about this - does anyone have any ideas?

Basically - this doesn't tally, as far as I can tell, with any of the sick plant diagnoses on the very helpful threads elsewhere in this forum (if it did i wouldn't be troubling you folks).

Here are some pics.

View attachment 2853678View attachment 2853677View attachment 2853676View attachment 2853675View attachment 2853674

I promise to beam waves of good karma to any responders from my very own frontal lobes.

Peace.

TOOO HOT for these plants !

 

[thelwall]

Thanks for the repsonse dude but it's not hot in there at all - max temp of about 77F...

 

[galderman0110]

Hold your hand at plant level under light. If it is uncomfy its too close. temp in room is secondary.
My room temp is a constant 75F, but I can easly burn my girls by getting too close.

 

[thelwall]

thanks but again it's not the temps. This is AK-47, a new strain for me; it's a well-established clone and i was feeding at 1.1 EC but that was too much. No nute burn, but a few deficiency-looking problems - lockout from overfeeding, I am guessing. I changed out the res, knocked it down to 0.7 and the new growth looks lush. Roots are taking off, too. I had heard this was a very sensitive strain? pheno? - whatever, it looks (touch wood) as though it's back on track.

Thanks for taking the time to respond though, have a splendid week

 

[topfuel29]

If it's not heat it could be a potassium deficiency.
What's the temperature of your nutrient solution?