Need help diagnosing problems

[shotgun10111]

Hey guy's & gals, I'm running into a few problems with this grow and need advice. I got 2 Think Different 58 days old, 1 Dutch Passion Blackberry Kush 59 days old, 1 Pakistan Ryder 57 days old & 1 Fastbuds Blackberry Kush 60 days old the 2 BlackBerrys and 1 Think Different are under a DIY Cree CXB3590 LED and the other 2 are under a Badboy T-5 I'm using Pro-mix HP and Tangs easy feeding schedule. I have never experienced anything like this in any of my other grows and the only difference is the new led I added and I switched from Tangs original feeding schedule to his easy one. I haven't checked my pH runoff but pH going in is always 6.5 to 6.6.

Here are a few pics and if there's anything else you need to know just let me know. Thanks for any advice, peace ✌

 

[Arpo]

Hi shotgun, are you useing any calmag or magnacal? I've noticed with my plants under led's when they start nearing cropping time they need more or my leaves turn crispy as well. I only grow indoors in coco not dirt though.

 

[namvet25]

Have you been using cal/mag?.How close is your cree light to your plants? What type of nutes are you using and there npk number and how much do you us?

 

[shotgun10111]

Hey Arpo, thanks for the quick reply. Yes I have cal-mag I use 1/2 tsp to 1 per gallon and that usually feeds 2 to 3 plants, that's per day so there only getting about 1/4 tsp every feeding. How much should I up it to? I was also reading Muddy's Pro-mix post and think I might need to lower my pH to 6.2 since Pro-mix starts out at pH 7, any advice on this?

 

[Arpo]

I upped my magncal to from 0.5ml per litre to 1ml per litre at around day 60, this has slowed it down a lot but also remember they are not far off done either so they will naturally start to pull everything out of the leaves. As for pH I'm in coco so mine goes in at 5.8, but outside in dirt I feed at 6.2-6.8 but thats a different ball game than LED's. I always put pH down in after I have mixed my feed.

 

[shotgun10111]

Hey Namvet, thanks for the quick response also. The led is 14" from the top and I cannot raise it anymore I turned it down from 400w to 275w thinking it was heat stress They got a little stretchy on me under the led. Her a pic of what I got on hand. They need to be feed now so just waiting on what you guys think I should do. Thanks alot

 

[Arpo]

Wow you have been spending some pennies. Never used any of them before but what EC are you feeding at?

 

[shotgun10111]

I don't have an EC meter or a pH probe just a pH digital pen but will order both today.

 

[Arpo]

I'm on day 73 at the moment and am just feeding now on A+B, magncal and molasses (run out of other stuff). I am putting A and B in at 3ml per litre and magncal at 1ml oper litre and a desert spoon of molasses. With your feeds I wouldn't do more than 2ml of A and B when adding everything else, it's a guessing game without a metre. What have you been feeding them at?

 

[shotgun10111]

I'm feeding 1\2 tsp Conn a&b, carbo, overdrive, B-52, bud x, cal-mag per gallon. 1tsp Molasses every other feeding and sometimes 1 tsp of Conn depending on if the plant is a little pale and tips aren't burnt. Just got done feeding them that with 1 tsp of Molasses pH 6.2, there's 4 so they split 1 gallon. My Fastbuds Blackberry has been getting plain water for 5 days now and should be done in another 5 to 7 days the Dutch Passion Blackberry will start getting just water after today. My Think Differents just don't seem to be getting that much fatter at there age, my other Think Differents were huge compared to these, but they were grown in soil. I think my pH has stunted the grow and has probably locked out some nutes, I know now to lower my ph in Coco.