whats wrong with this leaf

[blackhole]

week 5 in bud leaves are doing this only some of them mostly on the bigger plants
and on the fan leaves it starts at the bottom works its way up
co2 1300 burner
ppm 2100 with guardian meter
temp 84 with chiller
5 gallon pots plants 4 feet tall in promix soil
feed twice flush once
just did a big flush on all plants

What is causing this purpleing color to happen

 

[Teldren]

Re: whats wrong with this leave

Looks like it might be a phosphorus deficiency to me but don't take my word on it. Hopefully some more experienced growers will chime in. Also what strain is it because some strains just have more purple stems.
Good Luck.

 

[Flower Child]

Re: whats wrong with this leave

My first grow I had issues with the water that caused purple leaves and rust spots like that- it was lockout from high PH.

 

[blackhole]

Re: whats wrong with this leave

this is bubba
ph run at 6.6
any more ideas.......

 

[Marzbadrock]

Re: whats wrong with this leave

A whole plant pic would be helpful.

 

[KingJohnC]

Your leaf damage appears to be a phosphorous deficiency. You want pH 5.8 for hydroponic and soiless (peat moss and coco coir) and pH 6.5 for soil.

Here is a nutrient availability chart

Here is a cannabis leaf deficiency chart

here is the Cannabis Plant and Pest Problem Solver and the Plant Abuse Chart

Cannabis Plant and Pest Problem Solver - Pictorial

Plant Abuse Chart

 

[Marzbadrock]

Agreed, but keep in mind 6.5 is optimum for SOIL pH. Not the WATER you feed your plants with. Do a side by side and watch for yourself. Everyone has a different method, try and try again and do what works for you. There are too many factors in the world to have a definitive awnser for anything

 

[blackhole]

ok a pic

 

[alrightythen]

I have almost the same problems, mine is still on earlier stage than urs but in a few days or weeks will be like urs.so found the solution to help me as well

 

[blackhole]

I think it lacks phosphorus but not sure
6.5 weeks would like to make it to 8 weeks but don't think they will

 

[Marzbadrock]

You will make to 8, your plants are not healthy but there not dead. I'd pull the yellow and brown shade leaves out so the plant can put energy into bud and not saving its leaves.