Heat stress/ nutrient burn 1st grow

[Foz1]

Right guys so this is my first grow got 2 GSC on the left and 1 unknown on the right thinking it’s skittles as super fruity but unsure, anyways I’m 4 weeks into flower and noticing some pistols turning brown/ orange hard to tell which and leaf tips yellowing browning, have a done a flush and ph is all correct, only problem is my light can’t go any higher and it’s been running at 600w it’s about 40-45 cm from the top of the canopy, I’ve turned my lights down to 400w now but afraid it’s going to affect my yield because of the 200w Now missing, also no hermie no pollen sacs or nanas so only conclusion I can think of is light burn heat stress just never experienced light burn/stress so want to make sure that is what it is? Cheers

 

[hotrodharley]

Backed into the corner where air flow has to be impeded I'll go with heat stress.

 

[Foz1]

Backed into the corner where air flow has to be impeded I'll go with heat stress.

So only option really is to turn the light down right? Got a big fan in their also

 

[hotrodharley]

So only option really is to turn the light down right? Got a big fan in their also

Can you get any clearance? Away from the tent wall so air can get around? I hate reducing light but if that's the only solution then give it a try.

 

[hotrodharley]

All the air you can move over the plants or under them. No fans blowing directly on plants.

 

[Foz1]

All the air you can move over the plants or under them. No fans blowing directly on plants.

I’ve got a tower fan that’s half above and half below it’s blowing on the fan so should I put it back on the floor as currently got it elevated, literally got 0 room these were meant to be autos and they vegged too long lol

 

[Foz1]

All the air you can move over the plants or under them. No fans blowing directly on plants.

as you can see I’ve got a decent amount distance from lights

 

[hotrodharley]

I’ve got a tower fan that’s half above and half below it’s blowing on the fan so should I put it back on the floor as currently got it elevated, literally got 0 room these were meant to be autos and they vegged too long lol

No wind on the plant. It ends up looking like nitrogen overdose. Leaves have a hard time recovering.

 

[calvin.m16]

As @hotrodharley said.

All the air you can move over the plants or under them. No fans blowing directly on plants.

You need more airflow in the tent as far as actual wind on the canopy, it looks like heat stress for sure if not a bit of light bleaching too. You don't want fans blowing directly on the plants, you want to create wind in the space more than directly blast plants with air.

The grow looks good just need more airflow in that tent. Perhaps you could elevate the tower fan somehow or string it up so its higher up??

 

[Foz1]

As @hotrodharley said.


You need more airflow in the tent as far as actual wind on the canopy, it looks like heat stress for sure if not a bit of light bleaching too. You don't want fans blowing directly on the plants, you want to create wind in the space more than directly blast plants with air.

The grow looks good just need more airflow in that tent. Perhaps you could elevate the tower fan somehow or string it up so its higher up??

Put another 4 inch fan that I had above the canopy going to try and put the tower fan upside down somehow from the ceiling..

 

[BenGman]

You go from I've only got 40-45 cm to i got a decent amount of space from lights to 0 room lol.

Anyway, your light is not too close BUT you do need to keep the plants cool and in the right temp range or turn it to 400w you will lose a little yield for better quality...
Fix it or go with yield or go with quality that's up to you.

 

[calvin.m16]

You go from I've only got 40-45 cm to i got a decent amount of space from lights to 0 room lol.

Anyway, your light is not too close BUT you do need to keep the plants cool and in the right temp range or turn it to 400w you will lose a little yield for better quality...
Fix it or go with yield or go with quality that's up to you.

I think you meant to say if you turn it up without fixing temperatures you will get more yield less quality. I've put 400w HPS as close as 1 foot from my canopy where with 1000w I keep them 3 feet away.

 

[Foz1]

You go from I've only got 40-45 cm to i got a decent amount of space from lights to 0 room lol.

Anyway, your light is not too close BUT you do need to keep the plants cool and in the right temp range or turn it to 400w you will lose a little yield for better quality...
Fix it or go with yield or go with quality that's up to you.

I’ve put another fan in their going to check up on it later if it looks to have gotten worse might have to bite the bullet and just turn it too 400w next time going to get a higher ceiling tent. Lesson learned lol