Yellowing Underbrush

TankHankerous

TankHankerous

Well-Known Member
I am on day 6 since flip to 12/12 growing Chem '91 x Chem D. The plants are in promix hp, 5 gal pots., and I'm feeding with Gaia Green 4-4-4 and I gave them Neptune's Harvest Fish & Seaweed (2-3-1) the last watering, I also give them calmag because I'm using soft tap water.

The plants look okay but there is what looks like a magnesium deficiency showing in the lower leaves. They also have the red/purple stem streaking.

Here are a few pics of where I'm at. I appreciate any advice or feedback!

Overhead:

20230831_175523.jpg

Underbrush:

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20230831_175546.jpg

20230831_175556.jpg

Purple Stem Streaking, and what looks like healthy streakless new growth after applying the Fish and Seaweed

20230831_175811.jpg

20230831_175804.jpg
 
cannabiscrusader

cannabiscrusader

Well-Known Member
You can cut a lot of that bottom crap right off. Going forward, the fish and kelp is too strong in concert with the 4-4-4. Like 7cardbud said, she's overfed judging by the dark color and curl. Give it straight water for a week with plenty of runoff, then switch to a flower amendment like a 3-9-4 or something similar. That will help with the purple stems, and give your buds p and k they need to swell up.
When I grew in pots I fed 4-4-4 heavy a week before flower, then the 3-9-4 a week into flower. If you really need to add the fish and kelp, go super light.
And don't forget the worm castings. It's super cheap and makes a huge difference in breaking down those amendments for the plants to use. Bigger pots help too
 
TankHankerous

TankHankerous

Well-Known Member
7CardBud said:
lt looks overfed, dark clawed rolled leaves with tip burn. There are probably lockout issues.
Click to expand...
cannabiscrusader said:
You can cut a lot of that bottom crap right off. Going forward, the fish and kelp is too strong in concert with the 4-4-4. Like 7cardbud said, she's overfed judging by the dark color and curl. Give it straight water for a week with plenty of runoff, then switch to a flower amendment like a 3-9-4 or something similar. That will help with the purple stems, and give your buds p and k they need to swell up.
When I grew in pots I fed 4-4-4 heavy a week before flower, then the 3-9-4 a week into flower. If you really need to add the fish and kelp, go super light.
And don't forget the worm castings. It's super cheap and makes a huge difference in breaking down those amendments for the plants to use. Bigger pots help too
Click to expand...
Thanks guys, I forgot to add I also top dressed with worm castings before I watered on Wednesday. I'll take your advice with the straight water and post updates.

P.S. Any suggestions on how many ppms of calmag to use for a plant at this stage? Also I've heard people say water promix at 5.7-6.0 and others say 6.0-6.5. I understand the ph that matters is what's at the rootzone and testing the runoff ph only gives you a rough idea. I'm all over the place, HA!
 
warble

warble

Well-Known Member
The top looks good. The bottom leaves are not getting enough light. They die off. Get rid of them. Let the performing leaves perform. You don't get a bunch of light penetration indoors.
Doesn't look like a bunch of tip burn on the top leaves. Just dump the burnt leaves and let her do what she does. Keep up the good work.
 
7CardBud

7CardBud

Well-Known Member
Purple stems often point to phosphorus deficiency. Most common causes are cold wet compacted soil and antagonism from other cations like calcium.
I would give it only water for a while and try to extend dryback as much as possible to let roots breath. Water to runoff and then let the media dry out until it is very light but still damp. This is right before noticeable wilting will begin.

I don't know if you chose to do organics in Promix or were given advice to do so, but Promix really excels with soluble salt based fertigation.
With soluble feeds you are one watering away from making corrections, with organics you're kinda stuck with the bun in the oven, so to say.
 
TankHankerous

TankHankerous

Well-Known Member
warble said:
The top looks good. The bottom leaves are not getting enough light. They die off. Get rid of them. Let the performing leaves perform. You don't get a bunch of light penetration indoors.
Doesn't look like a bunch of tip burn on the top leaves. Just dump the burnt leaves and let her do what she does. Keep up the good work.
Click to expand...
7CardBud said:
Purple stems often point to phosphorus deficiency. Most common causes are cold wet compacted soil and antagonism from other cations like calcium.
I would give it only water for a while and try to extend dryback as much as possible to let roots breath. Water to runoff and then let the media dry out until it is very light but still damp. This is right before noticeable wilting will begin.

I don't know if you chose to do organics in Promix or were given advice to do so, but Promix really excels with soluble salt based fertigation.
With soluble feeds you are one watering away from making corrections, with organics you're kinda stuck with the bun in the oven, so to say.
Click to expand...
Thanks for the tips! I agree, salt based makes more sense especially in smaller pots
 
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Cpappa27

Cpappa27

Well-Known Member
Thats a progressing magnesium deficiency, its starts at the lower leaves as the plant is putting everything into the new growth. Eventually it will move up the entire plant. Your Nitrogen is a little high back off a little other than that your plant looks wonderful.
 
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