yellow leaves week 6 of flower

[wallnut]

not sure if this yellowing is light burn or something else... am at week 6 if flower and seems like the plant cant handle as much light as before... is the fact that im late in flower could reduce the quantity of light the plant can absorb? i raised and dimmed the light as a knee jerk reaction to the problem... any feedback appreiciated

[Nartak]

Wallnut,i absolutelly love ur nick!! Me n the wife call our house the Nuthouse (i have "nut" in my surname)!! Matie w6 of flower it would be crazy if they didn't go yellow and start to drop,it is "autumn" for the plant Or better place "fall" and they are killing they're leaves,dropping them as they are about to die!What light do you have and at what distance!

i raised and dimmed the light as a knee jerk reaction to the problem

When in doubt,wait a day!Since you said "dim" i believe you are running an HID setup,if your plants haven't grown taller i would leave the light where it is,you are going to be flushing which will already strip away most of the growth-assisting nutes the plants take up,removing lumens will make that harder for the plant to deal with...

Your buds look very tasty nut,good luck matie!

[steve]

the yellowing isn't the light but the nutrients you are feeding - consider starting the ":flush" being it's close to harvest - next grow look at nutrients using and x's feeding per week (many growers overfeed plants and therefore is a common issue) Great looking plants !!!

[Nartak]

Not implying you are wrong,wouldn't nute burn show up on more leaves rather than just the top ones?

[steve]

you are correct - could be heat stress or too much light - alot of times issue can be taken care of by using fans. Have you done the "back-of- hand test. Sorry about my first answer !!! PEACE

[Nartak]

Sorry? Why u say sorry man,i was only noting that i didn't see lower burns!!No need to apologize for anything as far as im concerned,we're all nutjobs,no competition here

[Canyon Grower]

I would say that you should be expecting yellowing leaves at this point, as Nartak suggests. Normal part of life cycle of your plants at this stage.

[Canuck147]

Above comments are all correct - yellowing is normal.

[wallnut]

thanks for all the answers

[wallnut]

you are correct - could be heat stress or too much light - alot of times issue can be taken care of by using fans. Have you done the "back-of- hand test. Sorry about my first answer !!! PEACE

yeah i did, dident seem too hot. also they have been at this distance for some time now, its like if the leaves are now more sensitive than they were before.

[steve]

Glad to hear that things work out OK - Happy Cultivation !!!!!

[NebulaHaze]

I agree it looks like light burn.
The fact that's it happening most at the top of the plant near the lights is another sign it might be light burn. Light burn is caused by too high levels of light for too long and can happen even if it's cool, kind of like how skiers can still get sunburn even in freezing temperatures.

I've found it seems like it's easier to give plants light burn after week 6 or so of the flowering stage. I think it's partly that the plant has mostly stopped growing new leaves, so when overworked leaves turn yellow the plant doesn't immediately replace them, especially on the colas. I also think the plant is slowly creeping taller, and that's bringing it closer to the lights even if you don't notice it growing taller every day.

But luckily it's an easy fix if light burn is the cause. Raising the lights like you did should stop the yellowing from spreading, though it's important to realize the yellow leaves likely won't turn green again. Definitely don't try to overdose the plant with nutrients and especially nitrogen to "green it up" because it won't work but could deposit a chemical taste in the buds (and too much nitrogen in the flowering stage could prevent the plant buds from getting as big as they could).

Of course if you haven't been checking the pH, now would be a great time to start! The pH being too high or too low is the most common reason to see nutrient deficiencies Managing the pH is almost like a supplement that makes plants grow faster and healthier!

Also, I just wanted to add that your buds and plants look great! The buds are very nicely developed for week 6!

[wallnut]

you are correct - could be heat stress or too much light - alot of times issue can be taken care of by using fans. Have you done the "back-of- hand test. Sorry about my first answer !!! PEACE

fan added! i also lifted the lights a bit a put them back to 100%

[wallnut]

I agree it looks like light burn.
The fact that's it happening most at the top of the plant near the lights is another sign it might be light burn. Light burn is caused by too high levels of light for too long and can happen even if it's cool, kind of like how skiers can still get sunburn even in freezing temperatures.

I've found it seems like it's easier to give plants light burn after week 6 or so of the flowering stage. I think it's partly that the plant has mostly stopped growing new leaves, so when overworked leaves turn yellow the plant doesn't immediately replace them, especially on the colas. I also think the plant is slowly creeping taller, and that's bringing it closer to the lights even if you don't notice it growing taller every day.

But luckily it's an easy fix if light burn is the cause. Raising the lights like you did should stop the yellowing from spreading, though it's important to realize the yellow leaves likely won't turn green again. Definitely don't try to overdose the plant with nutrients and especially nitrogen to "green it up" because it won't work but could deposit a chemical taste in the buds (and too much nitrogen in the flowering stage could prevent the plant buds from getting as big as they could).

Of course if you haven't been checking the pH, now would be a great time to start! The pH being too high or too low is the most common reason to see nutrient deficiencies Managing the pH is almost like a supplement that makes plants grow faster and healthier!

Also, I just wanted to add that your buds and plants look great! The buds are very nicely developed for week 6!

hey thanks, i have to say that i followed your mainlinig tutorial and that really helped. i havent been checking the ph though... so it might be off. this strain is jock horror (nirvana) and is supposed to be a longer flower period so i was a bit freaked out not to make it to the finish line...