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I thought that too. Especially on those last few pictures. I can’t get a decent view of the buds and it kind of just looks like the leaves died and curled up around the buds, casting a shadow on them...Unlikely, but check for bud rot.
I would say deficiency or toxicity if it wasn't happening overnight. Any chance you're hitting some areas a little hard or too close to lights on with one of your foliars?Hydro Growers:
1. Are you growing from seed or clones?
Clone.
2. How old are your plants?
Week 6 of flower.
3. How tall are your plants?
2.5 feet.
4. What type of hydro system are you using?
Coco, one gallon fabric pots, usually with Blumats, but hand watering this time around.
5. What brand/type of nutrients are you using?
Per gallon:
15ml Canna Coco
4ml Bloombastic
3ml PK 13/14
1ml MBFerts Bloom and Trichome
0.5g AgSil
0.25g Whey
6. What is the Ph of your nutrient solution?
5.8-6
7. What is the PPM/EC of your tap water?
RO, so ~10ppm.
8. What is the PPM/EC of your nutrient solution?
1200ppm (Hanna)
9. What is the temperature of your nutrient solution?
Probably 60-62F, give or take. If I leave half for the morning it'll be more like 70-72.
12. Do you foliar feed or spray your plants with anything?
Spray-n-grow, Bill's Perfect Fertilizer, Coco Wet
CA-25, Seaplex, Seagreen, AACT
Aptus Fasilitor and Massboost
Spinosad
Axiom
Bud Factor X
Regalia
13. What kind of lights do you use and how many watts combined? (HPS, MH, fluorescent, halogen, incandescent "plant lights")
4x DE HPS at 1150w or so ("super lumens").
14. How close are your lights to the plants?
3ft.
15. What size is your grow space in square feet?
130sq/ft
16. What is the temperature and humidity in your grow space?
75F, 55RH.
17. Have you noticed any insect activity in your grow space?
Happy little springtails.
18. How much experience do you have growing?
Years, but cycles are typically not back to back.
1250ppm bottled CO2.
Now that that's out of the way, I'm essentially waking up to tops with crispy, distorted leaves, despite those very leaves being perfectly fine the night before. Things were more clearly a phosphorous deficiency earlier in the grow, and watering more often seemed to solve the issue. It came back up, so I upped the phosphorous in my solution and again, it seemed fine; however, it's back again, and this time it seems to be moving faster. Previously a leaf would yellow, black spot down the center, typical; however, this time leaves are dying before they even have a chance to yellow.
I feel like I'm pushing plenty of P, so I have no idea, is Mendo Breath just the hungriest plant in the world? This issue cropped up in previous runs, not quite as bad, but... it's getting hard for me to not just hit them at 5000ppm, and abandon these shit genetics forever. :(
Sour 91 on the side is doing fine, a couple clawed leaves away from the light, presumably due to the nutrient strength, but they're also in 3 gallon fabric pots.View attachment 850957View attachment 850958View attachment 850959View attachment 850960View attachment 850961
I don't think it's light burn either but at 2' I'm guessing you're not running DE HPS at 1150 like he is.My plants would burn hard at 1200 PPM, they start burning at 400 PPM. Check the run off.
It is not light burn, the lights are at 3 feet, mine are at 2 feet.
This can be some lockout of micros.
...after topping three times. I may have undersold their size, especially relative to the one gallon pots. I needed to be watering more often a while ago, or... bigger pots, or make sure the irrigation is good to go before flip...3. How tall are your plants?
2.5 feet.
Just another thought, If your night time temps get cold enough your plants with a purple genotype will express those colors.
That’s not phosphorus deficiency. I’ve had phosphorous deficiency a few times and it starts on the lower leaves and works it’s way up the plant. Phosphorus deficiency starts with unsymmetrical yellow spots all over the lower leaves then turn to to brown spots, crisp up and die.
Checked for build up in the coco? Can do this sort of thing... accelerates as the plants get bigger because they draw water faster, concentrating salts faster.
I too, grow in 1 gal. fabric pots and coco. The plants get huge, and I water every 1-3 hours depending on density.
Mind if I ask about your nutrient situation? I didn't really consider how little phosphorous was in Big Bud, people said something about the aminos making up for it, but aminos convert to nitrogen, and Canna is already nitrogen heavy, which is why I mentioned nitrogen toxicity.
I just happened to have some left over Bloombastic (good stuff, not for irrigation) and PK 13/14 (no idea where this came from), which was lucky, but I'm out of all that, as well as the PK Heavy (samples to the rescue) I used last week. I have a good amount of the Big Bud clone, Overdrive clone, and l-glycine powder (whey is not for reservoirs) left, but... I think they're probably a bad match for Canna, especially as the Sour '91 seems to prefer less nitrogen.
I'll probably just go for PK 13/14 and foliar Boost, though Golden Tree/Flower Stacker has interested me for some time now...
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