Log In Register

Can't figure out what is wrong here. My plant has turned purple but some of the leaves are dying after yellowing

Follow Can't figure out what is wrong here. My plant has turned purple but some of the leaves are dying after yellowing on THCFarmer with grow updates, member discussion, images, and cultivation notes.
Home Forums Medical Cannabis Cultivation Grow Diaries Can't figure out what is wrong here. My plant has turned purple but some of the leaves are dying after yellowing
Grow diary eligible · Medical Cannabis Cultivation

Can't figure out what is wrong here. My plant has turned purple but some of the leaves are dying after yellowing

by yahschild · Started
1d
Running
0
Updates
24
Replies
1
Images
Discussion below · 24 replies
Page 1 of 2 · Replies 1–20 of 25
Y

yahschild

Posts
20
Reactions
26
Joined
May 3, 2025
Points
13
Cant figure out what is wrong here my plant has turned purple but some of the leaves are dying
 
The plants normally drop leaves as a part of ripening and senescence. Several things can cause the purple color, but it's not necessarily bad. More information might help. What are the temperature and humidity?
 
The plants normally drop leaves as a part of ripening and senescence. Several things can cause the purple color, but it's not necessarily bad. More information might help. What are the temperature and humidity?
My humidity I've been fighting but it's usually in the 50s and my temp is usually around the high 70s
 
My humidity I've been fighting but it's usually in the 50s and my temp is usually around the high 70s
I don't know what you mean by fighting humidity. In the 50s is okay, but it's also okay to let it drop into the 40s during flowering. They'll use a lot of water when the humidity is low and maybe ripen faster. Temperatures in the high 70s is good. That's all good, so the light is likely to be causing the fade and coloration. Mine usually have some purple mid- to late-flowering.

Flowering is the reproductive stage of the plant's life, so its flowers are its last priority before it dies. It no longer needs the large fan leaves, so it takes nutrients and moisture from them to help grow the flower buds. As those leaves fall, more light can pass to the lower buds, helping them ripen. I pull or cut them off when they're dead.
 
I don't know what you mean by fighting humidity. In the 50s is okay, but it's also okay to let it drop into the 40s during flowering. They'll use a lot of water when the humidity is low and maybe ripen faster. Temperatures in the high 70s is good. That's all good, so the light is likely to be causing the fade and coloration. Mine usually have some purple mid- to late-flowering.

Flowering is the reproductive stage of the plant's life, so its flowers are its last priority before it dies. It no longer needs the large fan leaves, so it takes nutrients and moisture from them to help grow the flower buds. As those leaves fall, more light can pass to the lower buds, helping them ripen. I pull or cut them off when they're dead.
I meant trying to keep it out of the 70s while also keeping the vPD between 1 and 1.5 and that plant is only 4 weeks into flower
 
I meant trying to keep it out of the 70s while also keeping the vPD between 1 and 1.5 and that plant is only 4 weeks into flower
My lights do get hot as hell though if I'm not careful my temp gets up to like 83 so I had to put an air conditioner at the other end of my intake fan
 
I gotta be honest here, it looks like your fading off right on time. These look pretty perfect for this phase in their life cycle. Like, spot on my friend.


This is what you want to see start happening a week or so before a harvest imho. it maybe slightly early here, but thats not a big deal, the plant still has nutrient stores left as it sits now. Deep emerald green fan eaves up until cut usually do the cured flower no benefits, even if you can squeeze a little more yield out doing that.

The yellowing from the bottom up is the plant consuming its nitrogen stores, you want to see this before a cut. You will experience taste and burn benefits for it.

The browning away tips past the yellow, bottom up, this late in the game is phosphorous (also a mobile nutrient like Nitrogen) being consumed by the plant. You want to see this before a harvest. you will experience taste and burn benefits for it.
 
Go ahead and remove the leaves that are totally spent. They’re just blocking light and air flow. As mentioned the older fans are a source of nutrients (as it’s easier for the plant to move the mobile nutrients than source new). So don’t go crazy and chop all the fans, but you have a fair amount that are done.
 
Go ahead and remove the leaves that are totally spent. They’re just blocking light and air flow. As mentioned the older fans are a source of nutrients (as it’s easier for the plant to move the mobile nutrients than source new). So don’t go crazy and chop all the fans, but you have a fair amount that are done.
Thank you
 
I gotta be honest here, it looks like your fading off right on time. These look pretty perfect for this phase in their life cycle. Like, spot on my friend.


This is what you want to see start happening a week or so before a harvest imho. it maybe slightly early here, but thats not a big deal, the plant still has nutrient stores left as it sits now. Deep emerald green fan eaves up until cut usually do the cured flower no benefits, even if you can squeeze a little more yield out doing that.

The yellowing from the bottom up is the plant consuming its nitrogen stores, you want to see this before a cut. You will experience taste and burn benefits for it.

The browning away tips past the yellow, bottom up, this late in the game is phosphorous (also a mobile nutrient like Nitrogen) being consumed by the plant. You want to see this before a harvest. you will experience taste and burn benefits for it.
Awesome man thanks
 
your not feeding correctly,.
what’s your growing medium?
what nutrients do you give them and how much?,..
 
your more like 6 weeks in flower
Hey brother I can show you. I keep a detailed photo journal on my Google one it is a picture subscription thing so I don't lose track....idk... Maybe I'm wrong but I counted back to when the first pistols popped out and it was 4&1/2 weeks my dude... I'll check again I work 13 hours a day so it's possible I fucked up but I don't think so
 
Hey brother I can show you. I keep a detailed photo journal on my Google one it is a picture subscription thing so I don't lose track....idk... Maybe I'm wrong but I counted back to when the first pistols popped out and it was 4&1/2 weeks my dude... I'll check again I work 13 hours a day so it's possible I fucked up but I don't think so

Theres plants that look like this by week 5, there's plants that look like this at week 8 lol. you cant tell how far a long a plant is without a +/- 2 week threshold of accuracy short of whether its just ripe or not from a picture lol. I have plants that look like this by mid week 5 lol. Others that still look like these buds when those fast are ripening up.

Looking at the closeup, yea your actually a bit early on a fade, but the N fade into phosphorous dropout is exactly what you want to see in the week to 10 days leading up to harvest, You probably were just feeding too light as the final sawell was trying to take off.

She hasnt stripped herself clean. Id give her a nice meaty even NPK ratio feed then coast to finish if she was in my tent.. But In ff with top dresses, not sure, Takes a bit for a new top dress to become availlable. Maybe next run add an additional dress before finish or just beef up the final dressing. The quality looks like its going to be fantastic tho. And this far along, unless she strips herself bare of mobile nutrients entirely before she finishes ripening up (which is unlikely), you arent actually going to see any noticeable quality hit at all. And just a small yield hit. Thats the purpose of nutrient storing fan leaves, in nature when the ground gets cold in late flower, plants struggle to uptake nitrogen and phosphorous. Theyre really good at moving those nutrients specifically around and repurosing what they already have when its no longer needed in the storage leaves because of it. Tbh, youll prob see flavor benefits.
 
Last edited:
Theres plants that look like this by week 5, there's plants that look like this at week 8 lol. you cant tell how far a long a plant is without a +/- 2 week threshold of accuracy short of whether its just ripe or not from a picture lol. I have plants that look like this by mid week 5 lol. Others that still look like these buds when those fast are ripening up.

Looking at the closeup, yea your actually a bit early on a fade, but the N fade into phosphorous dropout is exactly what you want to see in the week to 10 days leading up to harvest, You probably were just feeding too light as the final sawell was trying to take off.

She hasnt stripped herself clean. Id give her a nice meaty even NPK ratio feed then coast to finish if she was in my tent.. But In ff with top dresses, not sure, Takes a bit for a new top dress to become availlable. Maybe next run add an additional dress before finish or just beef up the final dressing. The quality looks like its going to be fantastic tho. And this far along, unless she strips herself bare of mobile nutrients entirely before she finishes ripening up (which is unlikely), you arent actually going to see any noticeable quality hit at all. And just a small yield hit. Thats the purpose of nutrient storing fan leaves, in nature when the ground gets cold in late flower, plants struggle to uptake nitrogen and phosphorous. Theyre really good at moving those nutrients specifically around and repurosing what they already have when its no longer needed in the storage leaves because of it. Tbh, youll prob see flavor benefits.
Hell yeah bro thanks for the advice it's much appreciated
 
Page 1 of 2 · Replies 1–20 of 25
Back
Top Bottom