What's wrong with these leaves ?

gforgrow

gforgrow

Member
No way overwatering. Underwatering maybe.
Heat stress it's a possibility, a few days ago the heat reach 105 F in the air
for 4 days and there is no AC in the plants room
 
Mcgician

Mcgician

Well-Known Member
It looks like a combination of both to me. A watering schedule the plants can't keep up with (for whatever reason), coupled with dry, hot air, or intense light- hence the zippering of certain leaves. Some strains are more susceptible to differing turgor pressures and needed growing conditions than others. For instance, my WW x OG even while being grown in the same environment, medium, and nutrient dosages/waterings exhibits slightly more zippering of the top most leaves than the other two strains being grown in the exact same situation. Find the ideal for what you're growing, and try your best to accomodate it. Transpiration rates are something to take note of, as well as nutrient levels. From my own experience, in order to stave off the downward leaf curl, up the nutrient solution a bit so that while underneath the intense lighting, the plants uptake less water and acheive a little bit more nutrient/water balance. This is however, very subjective, and ideally, IMO something that can only truly be evaluated by someone there in your own growroom. My blackberry kush exhibited signs of overwatering even though I knew it wasn't the case. The answer lied in the fact that I didn't trust the nutrient company's recommendations, and was, in fact, not feeding them enough. This issue never surfaced in any sort of typical nutrient deficiency, but in an ionic salt/transpiration battle. In my case, I saw leaf stems extended far beyond the plant's needs, and slightly more lanky growth. I've since learned from these experiences WITH THIS STRAIN, and have modified my dealings with it. More nutes, less frequent waterings, and alls been good. Maybe this will help? *shrug*
 
django

django

Active Member
looks like a pH problem to me dude. i have had a similar thing happen to me, it sucks. do you test your pH?
 
YungMune

YungMune

Well-Known Member
what stage or growing are u in? and what kind of light are u using? looks like your soil is a bad ph.
 
gforgrow

gforgrow

Member
Mcgician said:
It looks like a combination of both to me. A watering schedule the plants can't keep up with (for whatever reason), coupled with dry, hot air, or intense light- hence the zippering of certain leaves. Some strains are more susceptible to differing turgor pressures and needed growing conditions than others. For instance, my WW x OG even while being grown in the same environment, medium, and nutrient dosages/waterings exhibits slightly more zippering of the top most leaves than the other two strains being grown in the exact same situation. Find the ideal for what you're growing, and try your best to accomodate it. Transpiration rates are something to take note of, as well as nutrient levels. From my own experience, in order to stave off the downward leaf curl, up the nutrient solution a bit so that while underneath the intense lighting, the plants uptake less water and acheive a little bit more nutrient/water balance. This is however, very subjective, and ideally, IMO something that can only truly be evaluated by someone there in your own growroom. My blackberry kush exhibited signs of overwatering even though I knew it wasn't the case. The answer lied in the fact that I didn't trust the nutrient company's recommendations, and was, in fact, not feeding them enough. This issue never surfaced in any sort of typical nutrient deficiency, but in an ionic salt/transpiration battle. In my case, I saw leaf stems extended far beyond the plant's needs, and slightly more lanky growth. I've since learned from these experiences WITH THIS STRAIN, and have modified my dealings with it. More nutes, less frequent waterings, and alls been good. Maybe this will help? *shrug*
Click to expand...

Thanks dude
 
gforgrow

gforgrow

Member
django said:
looks like a pH problem to me dude. i have had a similar thing happen to me, it sucks. do you test your pH?
Click to expand...

django said:
what stage or growing are u in? and what kind of light are u using? looks like your soil is a bad ph.
Click to expand...

The PH in the water is always from 6.95 to 7.05 I have a digital PHmeter.
The soil is AllMix by Biobizz so and my nutrients ( BioGrow - BioBloom - BioHeaven )

I don't know if the light is a problem.
You see this plant is outside my darkroom (inside i'm at 12-12) waiting his time to go in
and there are only 2 150w CFLs ( 30w economy ) just to keep it alive
 
django

django

Active Member
gforgrow said:
The PH in the water is always from 6.95 to 7.05 I have a digital PHmeter.
The soil is AllMix by Biobizz so and my nutrients ( BioGrow - BioBloom - BioHeaven )

I don't know if the light is a problem.
You see this plant is outside my darkroom (inside i'm at 12-12) waiting his time to go in
and there are only 2 150w CFLs ( 30w economy ) just to keep it alive
Click to expand...
yeah you need a lower pH dude, i.e. more acidic. you want to be aiming for about 6, a tad above. look around for more precise values :)

hope this helps
 
EagleEyeHamThrust

EagleEyeHamThrust

Active Member
105? Oh yeah, that's going to cause some heat stress. I've had heat stress look exactly like that: wrinkled leaves with colorless patches on the edges. 85 should be your max temp.
 
jondamon

jondamon

Well-Known Member
your soil should buffer the ph so you can keep ph as it is .

if your temps have hit 105F this is your likely culprit as the RH would be very low in this kind of heat.

so its probably heat stress.

the zipper effect is probably caused by low RH as a direct result of the heat. warm air cant hold as much moisture.


J
 
You must log in or register to reply here.
Top