Hmmm, Help!

[Dannyy]

Hello guys! Hope all are well! So this is my first time growing for 9 years....then it was a couple of photo grows now I decided to go with the autos......Anyhow I have a 31 day old purple lemonade in flower everything has been going well and in my opinion she getting on ok! For the last 2 weeks I have had the odd yellow leaf pop up around the bottom of plant, I have just removed (totalling around 10 leafs in the past two weeks) can anyone tell me what this could be? Info and pictures to follow:

water water feed water water feed ect....
I use advance nutrients 3 part - micro grow and bloom to feed.

per 1.5 litres of still water I add:

1.5 ml cal mag
1.5 ml micro
1.5 ml grow
2.0 ml bloom

the ph is then adjusted to 6.0
(run off is at 6.77

I grow in 11l pots using canna terra plus soil. Under a 400w Hps on a 20/4 schedule.
Lights on temp- 74f 50% Rh
Lights off temp- 68f 50% Rh

can anyone please advise on this issue as I know it must be some sort of deficiency but can’t pin point it!

she has had no trading beside her is my 21 day old wedding cake which has had some LST (leafs just starting to yellow Also)
Thanks for the read peeps!

 

[Builder0101]

What is your PPM Going in? Is your PPM meter EC or 500 or 700 scale? Plants look great. Old bottom leaves may start to die off without any problem being present. It is a little cool lights on. As long as there is no light stress I would get the temps up. If you have an exhaust fan you may dial it down a little. I like to see at least 80° lights on. I run at 85-87 but with LEDs. Plants you should be proud of.
As you know calcium and magnesium are totally different things. I rarely use "cal/mag" I make calcium with 10 parts vinegar and 1 part ground eggshells. Epsom salt is fantastic because it has the so important Sulpher. It is pretty hard to overdo epsom salts.
Also are you in Coco or what? If coco you may want to drift below 6.0 once in a while. I may be contradicted which is fine but in coco I drift between 6.3 and 5.8 typically. I may go higher if my runoff starts to drop low. I'd suggest spreading thise branches to get some light down in but woumd hate to have you break a branch. Definately an art to manipulating large branches. They like to break off where they meet the main stem at this stage. Dont know if this helps. PPM meter helps. You may be able to push them harder and still stay in your comfort zone. Honestly would not worry or change too much at this point.
GREAT JOB! WELCOME BACK TO THE TRIBE!!!

 

[Dannyy]

What is your PPM Going in? Is your PPM meter EC or 500 or 700 scale? Plants look great. Old bottom leaves may start to die off without any problem being present. It is a little cool lights on. As long as there is no light stress I would get the temps up. If you have an exhaust fan you may dial it down a little. I like to see at least 80° lights on. I run at 85-87 but with LEDs. Plants you should be proud of.
As you know calcium and magnesium are totally different things. I rarely use "cal/mag" I make calcium with 10 parts vinegar and 1 part ground eggshells. Epsom salt is fantastic because it has the so important Sulpher. It is pretty hard to overdo epsom salts.
Also are you in Coco or what? If coco you may want to drift below 6.0 once in a while. I may be contradicted which is fine but in coco I drift between 6.3 and 5.8 typically. I may go higher if my runoff starts to drop low. I'd suggest spreading thise branches to get some light down in but woumd hate to have you break a branch. Definately an art to manipulating large branches. They like to break off where they meet the main stem at this stage. Dont know if this helps. PPM meter helps. You may be able to push them harder and still stay in your comfort zone. Honestly would not worry or change too much at this point.
GREAT JOB! WELCOME BACK TO THE TRIBE!!!

Hello builder0101! Thanks for the reply I actually only ordered and Ec meter last night....so will check levels when arrives tomorrow! So in your opinion, just leave for now and let her do her thing? Im going to give the branches a spread to allow more light penetration as you said, il just take it easy! Thanks again buddy!

 

[Builder0101]

Hello builder0101! Thanks for the reply I actually only ordered and Ec meter last night....so will check levels when arrives tomorrow! So in your opinion, just leave for now and let her do her thing? Im going to give the branches a spread to allow more light penetration as you said, il just take it easy! Thanks again buddy!

They look great. If multiple older leaves start to yellow it can be nitrogen deficiency the yellow would move up from oldest leaves to newest. I think you just have old leaves that are doing their thing. These plants look great. I would not change anything.

 

[St. Tom]

Hello builder0101! Thanks for the reply I actually only ordered and Ec meter last night....so will check levels when arrives tomorrow! So in your opinion, just leave for now and let her do her thing? Im going to give the branches a spread to allow more light penetration as you said, il just take it easy! Thanks again buddy!

I've not long grown this strain she hated strong food so go very easy with her