Marijuana leaf problems

This is the 4th week into flowering about to be the 5th in a day and 2 days ago this has happened can anyone help. It started after watering now days later here I am. Here's pictures. I use fox farm organic fertilizer. One light is a Mars hydro 600watt and the other a cheap spider farm copy cat of the sf1000 I think with the new Samsung LEDs LM301b. This is my first time writing on one of theses sites.

Here's the pics of What is going on, please help idk what to do here.

In order for anyone to help we need to what nutrients you’re feeding. How often? Are you using plain water at all, etc

first glance I’d say they look hungry.

Day temp stay around 70to 75 night gets down to around 65. A few times they got down to 60.. I also use c02 cartridges every once in a while, a trick my dad showed me a long time ago back in late 90's I think.

Fox farm big bloom I'm feeding it the way the bottle says general feeding. Maybe I need more?

Bump your day temps up to 80-85, they look hungry

Thank you guys for taking the time to reply. I'm new to all this and I'm really trying to learn.

Typically when your big fans are yellowing like that (especially if it’s from the bottom up) they’re hungry.

we were all new at one point

Also, give a slight tug on those yellow leaves. If they come off easy they need to come off

That's what there doing. I'm going to have to start doing a heavy feeding then. Thank you so much.

Pull those dead leaves and watch for your leaves to be “praying” to the light. That’s when you’re in the zone.

NewgrowerTimothy said:

That's what there doing. I'm going to have to start doing a heavy feeding then. Thank you so much.

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Are you only feeding big bloom at the moment?? The grow looks great overall, and the plants may be a bit underfed….but for heaven’s sake do not over react and go crazy w/ the bottled nutes.
We all want nice green fan leaves but in the end it’s all about the flowers. I would increase just a little first.
I am in the same boat as you, just a couple weeks ahead….mid flower I started getting the same deal..yellowing of fans and also brown spots. The consensus was the plants were underfed. I overdid it a little and got some nute burn. Depending on what all u are feeding, I would increase no more than 1/4 to 1/2….
Those buds will do their thing and look great in the end…..the fan leaves on the other hand will be an afterthought and in the trash bin.

Also, big bloom has no nitrogen. The plant needs N start to finish…just not as much. Folks, myself included, mistakenly cut all N, when it really needs to be reduced but not eliminated. Good luck.

Wattzzup said:

Pull those dead leaves and watch for your leaves to be “praying” to the light. That’s when you’re in the zone.

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When you say praying to the light and being dialed in, do you mean the tips pointing up? And this means you’ve hit a feeding sweet spot?
I’m sorry to have to ask, but my only growing was outside and many yrs ago. I harvested A+ quality many times, but have come to realize it mostly phenomenal genetics and loads of luck.
I’m a couple weeks away from finishing my first ever indoor grow and still learning all the terminology among many other details.
I recently had yellowing on my fan leaves on one plant and was told it was underfed. I basically panicked and over fed (I think). It burned the tips of a few new small sugar leaves and my cola leaves are “canoeing or taco-ing” and rolling inward from the sides…..almost forming a little leaf tube. The good news is the buds are moving along and looking fatter, stickier, and stinkier every day.
Growing has turned into my new hobby and aside from the initial investment, is much less expensive than most of my past interests.
thanks for everything…

Bullmark said:

When you say praying to the light and being dialed in, do you mean the tips pointing up? And this means you’ve hit a feeding sweet spot?
I’m sorry to have to ask, but my only growing was outside and many yrs ago. I harvested A+ quality many times, but have come to realize it mostly phenomenal genetics and loads of luck.
I’m a couple weeks away from finishing my first ever indoor grow and still learning all the terminology among many other details.
I recently had yellowing on my fan leaves on one plant and was told it was underfed. I basically panicked and over fed (I think). It burned the tips of a few new small sugar leaves and my cola leaves are “canoeing or taco-ing” and rolling inward from the sides…..almost forming a little leaf tube. The good news is the buds are moving along and looking fatter, stickier, and stinkier every day.
Growing has turned into my new hobby and aside from the initial investment, is much less expensive than most of my past interests.
thanks for everything…

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Skip the flush

Yes there’s a balance between “praying” and. “tacoing”

NewgrowerTimothy said:

Fox farm big bloom I'm feeding it the way the bottle says general feeding. Maybe I need more?

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Hairybuds said:

Bump your day temps up to 80-85, they look hungry

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Hairybuds said:

Bump your day temps up to 80-85, they look hungry

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I understand the optimal temps under LEDs is low mid 80’s……but what about the last 2-3 weeks of flowering?? I’ve heard and read that temps should be lowered for those last couple of weeks. That doesn’t necessarily make it the truth, so I’d like to know what others do.
I’m at the end of my first indoor grow and using a HLG 320w LED. I’ve only recently learned that my temps (low to mid 70s) were on the low side. I think I could have gotten much better veg results with the higher temps but that’s old news. I really want the buds to finish strong with the proper conditions….who doesn’t ?
Anyway, thanks for your advice.

Some people run it a bit lower in temp, mine does run a bit cooler because my dehumidifier doesn’t run as much late in flower and puts less heat into grow space. I’d see no reason not to run the same 80-85 tho, plants are still alive and ripening, this temp should make it finish sooner

Bullmark said:

I understand the optimal temps under LEDs is low mid 80’s……but what about the last 2-3 weeks of flowering?? I’ve heard and read that temps should be lowered for those last couple of weeks. That doesn’t necessarily make it the truth, so I’d like to know what others do.
I’m at the end of my first indoor grow and using a HLG 320w LED. I’ve only recently learned that my temps (low to mid 70s) were on the low side. I think I could have gotten much better veg results with the higher temps but that’s old news. I really want the buds to finish strong with the proper conditions….who doesn’t ?
Anyway, thanks for your advice.

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Reducing temperatures in late bloom simulates seasonal change and also can help preserve volatile terpenes in the buds. Anything hotter than 77 °F I believe it is, volatile terpenes begin to evaporate. If you smell your dank big time then usually the room could be cooled down near harvest. It's not mandatory though.

With LED if your air temps are colder than 80 °F you're wasting your time. I've had friends start growing and the same genetics I run that are ready in 50-55 days they end up having to run for 65-70 days because their plants were slow start to finish from low 70s environment with LEDs.

The plants need to move sugars, the warmer sugar gets the better and easier it flows. This is the reason you need warmer temps especially with LED.. HID lighting like HPS, CMH put off photo radiant heat which warms the plants above air temperature, this is why keeping a bit cooler HPS room especially in bloom is important. I've seen plant temps be +10 °F from air temp when airflow was poor or colas grew too close to lights.

calvin.m16 said:

Reducing temperatures in late bloom simulates seasonal change and also can help preserve volatile terpenes in the buds. Anything hotter than 77 °F I believe it is, volatile terpenes begin to evaporate. If you smell your dank big time then usually the room could be cooled down near harvest. It's not mandatory though.

With LED if your air temps are colder than 80 °F you're wasting your time. I've had friends start growing and the same genetics I run that are ready in 50-55 days they end up having to run for 65-70 days because their plants were slow start to finish from low 70s environment with LEDs.

The plants need to move sugars, the warmer sugar gets the better and easier it flows. This is the reason you need warmer temps especially with LED.. HID lighting like HPS, CMH put off photo radiant heat which warms the plants above air temperature, this is why keeping a bit cooler HPS room especially in bloom is important. I've seen plant temps be +10 °F from air temp when airflow was poor or colas grew too close to lights.

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Great information. Without a doubt on my next run I’ll be trying to keep temps in the low-mid 80s
However I’m still confused over what I should do right now….with buds that are taking forever and look to have 2-3 weeks remaining.
You mention the lower temps (late flower) simulating seasonal Changes and preserving terpenes. I am running LEDs (full spec, HLG 320xl) at around 80%.
Should I try to finish them at 77f (room temp) or go higher?
The poor plants have endured substantial temp variations since beginning to flower. Most of the time things were running in the mid 70s w/ mid 40s RH. Honestly my only real concern is how the buds just continue to spit out more pistils….it’s different from when they began flowering. The calyces are swollen and spitting out thick strands of 5-6 together w/ kind of a yellowish hue. At this rate they’ll take 17/18 weeks..maybe longer. They are starting week 14….and I know most autos go at least a week or two longer than the breeder timeline…..but this seems like an extreme case….the advertised timeline was 9-10 weeks (seed to harvest). Again I know breeder timelines are BS, but I’ve never seen buds grow like this.
As long as they are healthy and doing what they’re supposed to I have no desire to rush them or harvest early.
Sorry to ramble, I guess I’m asking should I try to finish at 76-77f to simulate seasonal changes and preserve terms?? OR raise the temps to get in line with the typical optimal temps??
I included some pics to show what I’m talking about. Thank you so much for taking the time to help a confused old coot.

Bullmark said:

View attachment 5063535View attachment 5063538View attachment 5063539
Great information. Without a doubt on my next run I’ll be trying to keep temps in the low-mid 80s
However I’m still confused over what I should do right now….with buds that are taking forever and look to have 2-3 weeks remaining.
You mention the lower temps (late flower) simulating seasonal Changes and preserving terpenes. I am running LEDs (full spec, HLG 320xl) at around 80%.
Should I try to finish them at 77f (room temp) or go higher?
The poor plants have endured substantial temp variations since beginning to flower. Most of the time things were running in the mid 70s w/ mid 40s RH. Honestly my only real concern is how the buds just continue to spit out more pistils….it’s different from when they began flowering. The calyces are swollen and spitting out thick strands of 5-6 together w/ kind of a yellowish hue. At this rate they’ll take 17/18 weeks..maybe longer. They are starting week 14….and I know most autos go at least a week or two longer than the breeder timeline…..but this seems like an extreme case….the advertised timeline was 9-10 weeks (seed to harvest). Again I know breeder timelines are BS, but I’ve never seen buds grow like this.
As long as they are healthy and doing what they’re supposed to I have no desire to rush them or harvest early.
Sorry to ramble, I guess I’m asking should I try to finish at 76-77f to simulate seasonal changes and preserve terms?? OR raise the temps to get in line with the typical optimal temps??
I included some pics to show what I’m talking about. Thank you so much for taking the time to help a confused old coot.

Click to expand...