Flowering Plants Continue to Struggle Weeks After PH Correction - Pics

Enoch7

New Member
Setup:

-4x4x6.5 tent

-600W HPS + (4*23W CFL)

-#5 (4.2 gal) potting buckets

-8 plants (4 AK-47 XTRM, 4 unknown lemon strain)

-soil: 75% Pro Mix BX, 25% perlite

-Nutes: Earth Juice Grow, Bloom, Microblast, Catalyst + PH Up

-All plants were seeded directly in the soil on April 24th.

-Flowering induced at 5 weeks for all plants

-Watering every 48 hours with mild run-off each time (tap water as base, 7.0 ph)

-Temperatures ranged 72-76 during much of the vegetative stage, 76-82 during flowering at canopy

This is my second grow (the first didn’t produce smokeable buds). The plants are doing much better this time, although lots of mistakes were made again. The biggest mistake was not using PH Up with the Earth Juice during the entire vegetative cycle, it was only added to the process at about week 7. During that time, I noticed that the plants would have trouble after feeding, and I erroneously believed it was due to overfeeding. Thus, I dropped the feeding ratios well below the “mild” amount on the bottle during vegetative for the Earth Juice Grow solution. The problems were probably due to the incredibly acidic feeding solution.

The PH issues have since been corrected. I’ve tested the run-off and it is between 6.5-7.0 for all the plants (I’ll be careful not to over-correct). However, the plants still seem to be having a lot of trouble. The lighting is 12/12 but I’m considering changing it to 11/13. Growth of the buds seems to be quite slow and the new leaves are still developing these reddish-brown splotches. Worse, the plants are definitely yellowing at an alarming rate, especially the bottommost leaves. There has been a lot of death in the lower regions of the plants, which is starting to creep into the middle areas in some of the plants. I didn’t do any cropping of the plants.

With the PH issues corrected, I’m at a loss for how to proceed. Is it a nitrogen deficiency? Magnesium deficiency? Too cramped, not enough CO2? I don’t have a regular feeding schedule since everything was thrown off kilter and I don’t know what the present problems are. I’m still using ratios lower than the “mild” amount for the Earth Juice. I’ve included pictures to help aid the diagnosis. Let me know if more information is needed. Please advise, thank you.
 

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caveman117

Well-Known Member
Well first off can I ask why your last crop produced "unsmokable" buds?I have clipped buds at 4 weeks before and quick dried in a dehydrator and it still got me ripped.

And as for those plants in the pics it looks like a few different ddeficiencies which makes me think your still having ph issues. But considering you havent been feeding I guess it could maybe acrually be deficiencies. Id say try and feed it with a mild solution cpnsisting of a little bloom nutes and a little veg nutes just to balance things out a bit in the npk department.
 

Slebber

Member
I'm pretty new here and new to growing so I'd advice to take anything i say with a pinch of salt.

My gut on this would be that you've got an over abundance of one of more nutrient. I not learnt enough to tell you which but i suspect this since you've had ph problems.

If your ph has been out so much then it stands to reason that you've probably ran into nutrient lock out, if its not being absorbed then its probably still in the soil. I'd image that now you've got the ph issue sorted and that new feed amounts being added are mixed properly, you're now adding additional new nutrients of the same type on top of the nutrients that were presently locked out and still in the soil.

Could be that you've got the ratios knocked out, because of what's in the soil already, not what you are adding now.

Unless someone suggest otherwise, I'd consider my next watering a clean flush ph6.5 water only, then start to add nutrients again at a quarter rate and build back up.

But as i said, I'm pretty new so, yeah.
 

Hotboxbudz

Well-Known Member
I think your problem is they have out grown there pots, and its limited nute up take. So it doesn't matter if you feed them the problem will continue.

Transplant, give water only when needed for 2 weeks.
 

Enoch7

New Member
Thanks for the feedback. I have upped the nutes, based on feedback here and elsewhere.

@Hotboxbudz
I'm not sure how these plants could already be rootbound in a 4.2 gallon pot after 10 weeks. People routinely plant in 3 gallon pots with no problems. The consensus seems like 1 gal of pot size for 1 foot of plant. My tallest plant is 3.5 feet which wouldn't even be at that limit.
 
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polishpollack

Well-Known Member
remember this is an annual plant and will die naturally. that said, your plants look like they've been too warm. that leaf edge curling upwards usually means air temp is too warm. also, why are you feeding so much if you're using promix? I thought there was fert in that already. I'm going to guess that what you're seeing is a combo of things. I don't think I would focus on pH so much. I think the range for soil is more like 5.8-6.8. maybe try foxfarm soil next time or happy frog and not worry so much about pH or feeding unless necessary.
 

Semper.Fi

Well-Known Member
Does look like lock out to me too @Slebber . . . .

In particular the plants all seems to be showing trace elements, and nitrogen missing!! . . . How moist is the soil when you add more water/feed?

I'd prepare three times the amount water to soil, mix a 1/3 maybe 1/4 strength solution of MicroBlast and EJ Grow PH'd to 6.8 . . .and flush em through some more . . . . . . at 6.8ph there's more of a chance of the major players (NPK,Mg,Ca & S) getting assimilated from the water, any salts in the soil, will hopefully attach to the weak solution and get dragged out . . .. alternatively get yourself some Florakleen from Genhydro, brilliant salt clearer, my choice if I'm in this predicament.

Bet P & K has been piling with the soil @ the wrong PH and locking out N Mg Ca and trace!


~_
 

Enoch7

New Member
@beepotron
I'm testing the run off and fertilized water with a test tube and ph drops.

@semper
Thank you for the detailed answer. I just ordered some Florakleen and will try your advice. The soil is not moist at all, at the top of the pot or at the bottom through the holes. It's dry to the touch. Humidity is usually around 45-55.
 
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Semper.Fi

Well-Known Member
All good, anytime . . .

Here's another bit of advice; to make sure there are no hot spots in your soil . . . .

If you can find a container you can put your plant pot into, I'd make up 2 quarts over your plant pot size of Florakleen 2ml per quart, PH it to 6.8 . . . . slowly immerse your entire pot into the solution until it sits in there, even if it floods over the top, don't worry, let it sit there for at least half an hour totally immersed and drenched, you may well see a load of bubbles start to rise to the top, as liquid hunts out the dry spots. Once you've left it for a bit, pull out the plant pot, discard whats in the bucket, make up another load of FK @ 1ml per quart, the same amount as you have soil, and pass that through normally . . . .you'll get a far more efficient flush with FK that way ;)

@beepotron
I'm testing the run off and fertilized water with a test tube and ph drops.

@semper
Thank you for the detailed answer. I just ordered some Florakleen and will try your advice. The soil is not moist at all, at the top of the pot or at the bottom through the holes. It's dry to the touch. Humidity is usually around 45-55.

~_
 

SamsonsRiddle

Well-Known Member
DUDE - PROMIX IS NOT SOIL- Your Ph going in needs to be 5.8-6.2, or since you're in flower 6.0-6.2 6.5MAX... more nutes is hardly ever the solution because with PH lockout the nutes are there just locked out of being taken up through the roots.
 

Semper.Fi

Well-Known Member
Yeah he's decided to take advice dude and get a flushing agent . . . .if one does not have access to a flushing agent a very weak solution is the best way to dislodge salts in the medium, far more effective than standard water!! ime!

There are soil based promixes!

http://www.promixfindgrowtopia.com/product/detail/pro-mix-vegetables-herb

Check the ingedients . . . .

DUDE - PROMIX IS NOT SOIL- Your Ph going in needs to be 5.8-6.2, or since you're in flower 6.0-6.2 6.5MAX... more nutes is hardly ever the solution because with PH lockout the nutes are there just locked out of being taken up through the roots.

~_
 

SamsonsRiddle

Well-Known Member
Yeah he's decided to take advice dude and get a flushing agent . . . .if one does not have access to a flushing agent a very weak solution is the best way to dislodge salts in the medium, far more effective than standard water!! ime!




~_

Flushing is going to stress the girls too much, just keep feeding lightly with 40% runoff every time, much less recovery time.
 

Enoch7

New Member
What do you mean that it is not soil? I'm going to be flushing at 6.8 but the PH needs to be 6? What should my PH be at?
 

SamsonsRiddle

Well-Known Member
What do you mean that it is not soil? I'm going to be flushing at 6.8 but the PH needs to be 6? What should my PH be at?
Promix is a "Soilless Mix" - it is not mean to be treated like soil nor like hydro, but like a hybrid in between. Check out the link i sent you of someone else who grows Promix and check out what his PH is.
 
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