Smooth Smoke flowering

[forgottenleg]

Hi there this is a smooth smoke by Tropical seeds, a beauty if ever there was one. Recently she started looking as though she had a P+/K def but I would like to hear people’s thoughts.
Week 6, coco, drain to waste, ph is on point at around 5.7, temps, humidity all environmental factors are kind , I have been watering every 3/4 days as the pot gets a bit lighter. I’ve given her a small amount of AN sensi bloom A and B but I’ve cut that now but she is still getting close to the full recommend amount of GHE Florabloom at about 2ml/l every few days. Thoughts? Is she a heavy feeder and I’m under feeding? The effected growth is only really at the top of the plant, largely on the new growth with leaf tips curling and dying a brown grey colour. Fan leaves effected as well. The buds don’t smell over ferted but I’d love to hear more input! Thanks all

 

[iShatterBladderz]

What size pot is she in? How dry is the coco whenever you go to feed?

I would up your PH a bit as well. with coco, ideal range is 5.8-6.2. I usually aim for 6.0 during veg and 6.2 during flower. This is anecdotal, I don’t have any science to back it, but It seems like the plants better absorb magnesium and/or phosphorous when the ph is above 6.0.

 

[forgottenleg]

Hi thanks for your reply, yeah I will up the ph a tad, it may have drifted to around mid 5’s. The pot was left until it was around 40% dry but the past week or so it has been much wetter due to me trying to fix this problem

 

[forgottenleg]

I’m still figuring out how these picture uploads work lol , hopefully you can see the pot size , it isn’t very big for the plant

 

[CannaCountry]

How are you addressing Mg in your grow?

 

[forgottenleg]

How are you addressing Mg in your grow?

Hi I am unsure what you mean by that. If you mean what are my sources of mg it is from the gradually decreasing amounts of (now stopped at end of week 6) AN sensi bloom A and B and GHE flora bloom, which I am still feeding with at a rate of 2ml/l
Also flowering boosters I have been using are big bud, bud candy, carboload, bud factor x, and overdrive.

 

[JohnDee]

forgotton,
What CC was referring to is...are you adding in any calmag or epsom salts to bump Mg? Cannabis needs lots and many nutes don't have enough.

And yes...your leaves are light and need more food. N specifically.

Amd be sure you get good runoff when you water...like 20%
JD

 

[forgottenleg]

forgotton,
What CC was referring to is...are you adding in any calmag or epsom salts to bump Mg? Cannabis needs lots and many nutes don't have enough.

And yes...your leaves are light and need more food. N specifically.

Amd be sure you get good runoff when you water...like 20%
JD

Hi John , thanks for your input. I have shogun calmag but I haven’t used any of it after week 2 of flower because the A and B provide the calcium and mag, and the GHE bloom nutes and AN flower boosters add more magnesium. I’m using rainwater that has overflown from the pond in my garden, I always get at least 20% run off with each ‘fertigation’.
She must just be a much heavier feeder than anything I’ve done before because with previous strains I often ran into N toxicity issues at this stage during flower. The plant being almost starved of N at this point isn’t of much concern and I honestly do not believe that is an issue at this stage of flowering. Calmag products add substantial amounts of nitrogen to the medium and that has only given me toxicity issues at this stage.

 

[forgottenleg]

The lower bud growths and leaves are still a healthy green colour , so it’s just the top growths that are suffering, I’ve lifted the light up a couple inches and fed a strong flowering solution with everything the plant needs but a minimal amount of nitrogen.

 

[JohnDee]

With 20% runoff, I don't think you have any salt buildup...that would be less specific. You're exploring light issues right now? Could be but seems unlikely to me.

I personally don't like that much yellow in my flowering plants. I'd try increasing nutrient dosage a bit.
JD