Droopin/cupping leaves need your expertise!

[cheeched]

High all! This is my third grow and I'm having some issues with my Island/Tropical Kush plants.

1. Island or Tropical kush almost to 3rd week of 12/12.
2. 6"rockwool cubes.
3. Indoor 4x8 ebb n flow. Watering twice a day. 1Hour after lites on & 1 hour b4 lites off.
4. 2-1000w hps and 1-600w conversion in the middle (all aircooled).
5. Temps: 65-70(night) and 73-77(day).
6. RH: 55-60%(night) and 45-55%(day).
7. FLoranova Bloom, Liquid Kool Bloom, and Floralacious Bloom(instead of Plus) as per GH nutrient feeding schedule.
8. Nute solution is 1440ppm minus 120ppm of my tapwater and is 68 degrees f.
9. Ph is 5.8

My plants started having these issues about a week ago. I haven't noticed any nute burn but I believe I have some deficiency issues. Some upper leaves on a couple plants are yellowing, small leaves by buds are cupping in and drooping, some are shriveled up. I water them twice a day and top feed them every 3-4 days to get rid of any salt accumulation. I change my res. every 7-10 days. Please let me know what yall think. Thank you very much everyone.

 

[cheeched]

Here's some more pics

 

[cheeched]

 

[feelingfactory]

Guess what? That's what my girls looked like when they were getting fed too much. When ppms increased even more, they turned dark green and "clawed" even more severely + nuteburn on top leaves. I see some yellow tips on some of your photos. Slight nute burn so take it easy on the ppms.

 

[greentrich]

Guess what? That's what my girls looked like when they were getting fed too much. When ppms increased even more, they turned dark green and "clawed" even more severely + nuteburn on top leaves. I see some yellow tips on some of your photos. Slight nute burn so take it easy on the ppms.

Agreed. More specifically looks like an N toxicity. 3rd week of flower at 1400??? Tad too heavy imo.

 

[cheeched]

Guess what? That's what my girls looked like when they were getting fed too much. When ppms increased even more, they turned dark green and "clawed" even more severely + nuteburn on top leaves. I see some yellow tips on some of your photos. Slight nute burn so take it easy on the ppms.

Yeah my lights just flipped on and my leaves do seem to be getting darker on the plants with the worst cupping. Maybe too much nitrogen. Do you think I should flush the rockwool with plain water only or with lite nutes? Maybe let it only have water for awhile? Some of the small leaves are shriveled and some leaves on a couple plants are turning yellow like they have nitrogen deficiency. Thanks a bunch.

Agreed. More specifically looks like an N toxicity. 3rd week of flower at 1400??? Tad too heavy imo.

Yeah I'm thinking nute lockout eh. N toxity would explain alot. Do you think I should flush and only give water? I really appreciate the help. thanks.

 

[greentrich]

Unfortunately I don't know your nutes very well...so the course of action to remedy an N toxicity with your formula from me would be a total guess. I'm not too comfortable giving advice on that one.

What I do know is you are in flower now...3rd week right?? So your plants are wanting more P and K and not nearly as much N as they wanted 3 weeks ago. In my set up...coco with Botanicare nutes (cal/mag, probloom, hydroplex bloom enhancer) I wouldn't necessarily flush with plain water as your ladies are wanting more of a specific food, and you don't want to rob them of that. In mine, I would just back off the probloom and let the cal/mag supply the N. The hydroplex I use has no N, and the cal/mag has a good amount. This actually happened to me when I first went into flower myself. Instead of flushing, I just backed off on N and they perked back up in a few days. Good thing about hydro...you can makes changes and see results quickly.

To clarify, here are the formulas for my nutes:

Cal/Mag+: 2-0-0 ProBloom: 1-4-5 Hydroplex: 0-10-6

As you can see, cal/mag has a good amount of N, and hydroplex has no N, but good amounts of P and K, I lower the amount of Bloom I am using to almost nothing (just to clear the toxicity) letting the cal/mag and hydroplex do most of the work.

Like I said, this is in my set up. If I were to offer any advice, it would be to make the corrective action based on your nute formulas. Every environment is different.

Good luck, keep us updated.

 

[cheeched]

Thanks gt! The FloraNovaBloom is 4-8-7, Floralacious Bloom is 1-1-1, and the Liquid Kool Bloom is 0-10-10. I dumped/cleaned and refilled my res(just water) last night. A few people on a different forum seem to think I should only give my ladies plain water for a week or so. I was thinkin about maybe just doing a mini flush then using my base nutrient(FloranovaBloom) at like 1/4 strength and hopefully that'll fix it. Decisions decisions, flush or not to flush. Thanks for the advice and I'll definitely be updating.

 

[greentrich]

NP bro.

Flushing isn't too bad of an idea. My philosophy...when in doubt: flush. However...gotta be careful. Your plants are craving K right now, but they still need the others as well...just not as much. So if you flush, make sure you follow it up with a fertigation solution. Whether it be a low strength of your base nute, or a small mix of the Floralacious Bloom and Kool Bloom together.

Plain water for a week is a little sketchy IMO. You could end up with other deficiencies if you haven't already. Too much N has a bad habit of displacing Ca. Point being is they MIGHT already be a bit Ca deficient, and plain water for a week could possibly escalate that. So if you flush, just follow it up with some food. Just from some quick research, looks like the NovaBloom has all the micros you need (including Ca). So like you said, following up with a week solution of that should do nicely. Maybe mix that with some KoolBloom?? That would drop your N a bit but still keep the necessary P and K needed for flower development.