Sad droppy plants

[KonopCh]

I grow in 70/30 coco/perlite in autopot. pH is in check, I set it at 5.7 and let it drift to 6.3. They're under 220W DIY COBs. Light is 30-40cm above plants, I have 6 COBs at 37W. Temperature when lights on is 25-29°C, when lights off it's never under 19°C.

4 hours before lights off they're droopy. Then they go to sleep for 4 hours. After lights on they're still perfect... for next 15 hours?
I didn't notice that before on previous plants.




Second problem is... Calcium?

 

[MedGrower]

That looks like combination of Ca and Mg deficiency. Yellowing pattern is Mg and brown spots are Ca.

I've noticed that some strains go quite really droopy some hours before the lights go out and perk up at the morning again just nice. I understood that at daytime the leaves are strong and perky? This may a sign of a slight light stress also.

 

[Sony]

the spots could be manganese excess some products have way too much of it example biobizz algamic has 50 times the required dose for plants which can lead to problems when used regularly.
some more Information would be helpful like strain,nutrientsl,ything within the setup changed recently?
29°c is relatively hot. watered enough ?

 

[Waira]

Konop'-- the spots, mid to high on the plant? Red petioles aren't a good sign, might be hinting at P defc,...unless this strain is known for normal color here? it's not a solid diagnostics symptom, but a scale tipper if other symptoms are present,... the broader spots could pass for both Ca and P defc., Ca is usually finer, tends to hug the veins often; P tends to be more blotchy, patchy, but sometimes you get this in-between one that are ahrder to call,... the yellowing, I'm with med', likely some Mg defc, but a pattern I see with some P defc. is this yellowing, not listed as a typical symptom, but I've seen it too many time now to discount that,.... what nutes and conc. are you running in the Autopots?

 

[Arthur]

Most of my ladies seem to know when it's time for rest, a very obvious droop just before lights out. There's plenty of time lapse footage on YouTube of cannabis going thru its day/night cycle. There's quite a change in plant posture.

Kinda wanna try the time lapse thing myself...

 

[KonopCh]

Konop'-- the spots, mid to high on the plant? Red petioles aren't a good sign, might be hinting at P defc,...unless this strain is known for normal color here? it's not a solid diagnostics symptom, but a scale tipper if other symptoms are present,... the broader spots could pass for both Ca and P defc., Ca is usually finer, tends to hug the veins often; P tends to be more blotchy, patchy, but sometimes you get this in-between one that are ahrder to call,... the yellowing, I'm with med', likely some Mg defc, but a pattern I see with some P defc. is this yellowing, not listed as a typical symptom, but I've seen it too many time now to discount that,.... what nutes and conc. are you running in the Autopots?

Yep, mid to high on the plant.
I am using AN nutes with RO water in autopot. 70/30 coco/perlite with airomes covered with perlite.
My Ca/Mg supplement has 3% Ca and 1% Mg (both nitrates), today I up it from 2ml/L to 2.5ml/L, also add some PK (I already have some P from pH down).

Biggest problem are droopy plants...

 

[KonopCh]

That looks like combination of Ca and Mg deficiency. Yellowing pattern is Mg and brown spots are Ca.

I've noticed that some strains go quite really droopy some hours before the lights go out and perk up at the morning again just nice. I understood that at daytime the leaves are strong and perky? This may a sign of a slight light stress also.

Most of my ladies seem to know when it's time for rest, a very obvious droop just before lights out. There's plenty of time lapse footage on YouTube of cannabis going thru its day/night cycle. There's quite a change in plant posture.

Kinda wanna try the time lapse thing myself...

I know they have their own "biorhytm"... But... They are droopy all day now... At first they were droopy 4 hours before lights out and then when light out of course. So 8 hours per day.
Yesterday and today they're droopy all day... which I don't like...
I don't know what is it...
pH in check, temperature in check, autopot is working, moved lights 40cm above canopy...

 

[Arthur]

Have you thought about folier feeding the calmag? Faster uptake... as to the droop, what about a root issue? fungus, slime, rot....

 

[Arthur]

I pulled this off the Web

cannabis Plants With Root Problems Show Many Symptoms

• Cannabis may appear overwatered or droopy
• Curling or cupping of leaves
• Wilting - either individual stems wilt or the whole plant may wilt
• Slow growth, or staying very small for weeks
• Leaf yellowing, or sometimes even other colors like purple or red
• Brown spots / Burnt spots
• Other strange nutrient problems
• Brown or slimy roots - this is often a sign of root rot
• Smelly runoff water (smells rotting or musty)
• Leaves may start dying and falling off rapidly
• Plants drink much less water than usual

 

[Kneehigh85]

I grow in 70/30 coco/perlite in autopot. pH is in check, I set it at 5.7 and let it drift to 6.3. They're under 220W DIY COBs. Light is 30-40cm above plants, I have 6 COBs at 37W. Temperature when lights on is 25-29°C, when lights off it's never under 19°C.

4 hours before lights off they're droopy. Then they go to sleep for 4 hours. After lights on they're still perfect... for next 15 hours?
I didn't notice that before on previous plants.




Second problem is... Calcium?

Looks like it could be heat stress, leaves can curl, droop, even turn color due to the burning and heat. Your plants in flower? If so you’ll need to go below 25 celcius


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