Phosphorus or calcium

[No3odiesShad0w]

This getting me so annoyed. Different medium same problem. Ruled out the pH. I got 6.2 going in and 6.2 coming out. I'm thinking....I might be under feeding? There's a crap ton of flowers and they're already stacking on day 15 of the bloom. I gave her a healthy amount of NLS flower power 10 days ago but I think it might be time to make a tea and water her with that.... pretty sure she just needs more food.

Other possibility is calcium but that wouldn't have the red stems issue.

Secondly wtf is the matter with uploading pictures. I've never had a picture I posted under 2.0mb and now all of a sudden every picture is too big over the 2mb limit.... Good luck seeing stuff properly at lower MB.

 

[No3odiesShad0w]

VPD is at 1.13kPa, CO2 between 900 to 2000ppm DLI is around 46 ish 47ish. I could probably push that more but not if I have deficiency. I think I'm just under feeding for all she's doing in so short .....I never really had all my stuff locked in .... Never had anything grow like this before.

 

[Rwise]

Raise the PH to 6.5-6.8 with soil in flower.

 

[OldManGrower]

I do not know what your grow medium is, but if it is soil, 6.2 is too low. I needs to be around 6.5-6.8. The low PH, if in soil is resulting in nutrient up take inhibition especially in calcium and magnesium. Higher PH and Cal-Mag should fix your problem.

 

[No3odiesShad0w]

Coco with organic amendments....I was thinking about raising the pH to at least 6.3 but everyone I ready about Coco keeps saying 5.5 to 6.2. But I'm not running synthetic nutrients. I'm doing what I would do in soil but in coco. I kept having problems with acidity with the soil going down to like 4.8ph so I figured I try Coco. Everything was going really well until it started blooming. ...... Same problem.

I'm beginning to wonder if the problem is the nature's living soil because that's been the only constant throughout this whole problem finding mission.

 

[No3odiesShad0w]

Literally following their recipe. Only thing is ice been keeping the pH at like 6.28 -6.22 but I guess next watering I'll do 6.5. I did just notice they keep saying 6.5 on the site even though it's Coco

SOOOOO much conflicting info when it comes to weed. This is why I hate bro science. Just muds up real science

 

[No3odiesShad0w]

Then you read stuff like this and I just think well I'm not in Soil and 6.2ph seems to be the middle point for both so I was just sticking with that. But 15 days into bloom clearly it's not it ..... Good thing I have to water daily..... Today I'll water with 6.5ph I gave her a strong tea yesterday. If the pH is the issue. Raising it shouldn't be hard in the Coco since it's been fairly stable unlike the shit Fox farm soil

 

[StickyNugsAZ]

I think that recipe should be treated as if you are growing in living soil

 

[No3odiesShad0w]

Yeah I think that's been my mistake. Just overthinking everything. It does say in the NLS website to do 6.5ph. Not sure how I missed that. Just gonna give that a try starting tonight. Would be a shame to have such a nice plant underperform

 

[Ckbrew]

You didn't say what the percent coco is but from your description it sounds like the majority. Did you pre-buffer the coco? Coco will bind ca and mg. It should be soaked in water with calmag before use. I use 10ml/G and pH adjust as needed. This saturates the coco so it will not bind up ca and mg from the nutrient source. There also may be a pH issue. With the mix you are using idk where it should be.

 

[No3odiesShad0w]

Yeah I think that's been my mistake. Just overthinking everything. It does say in the NLS website to do 6.5ph. Not sure how I missed that. Just gonna give that a try starting tonight. Would be a shame to have such a nice plant underperform

I'm using the canna coco. 75% with 25% perlite. I ran water through it and had an EC of 0.3 so I used it as is. It's supposed to be pre buffered .....I never used Coco before I was just so fed up with soil over the last 3 years. I heard all the stories about ppl buying bricks of Coco and it's trash so I spent the extra money to get one that's washed and buffered. I've been adding between 3.5 to 5ml/gallon(GH cal-mag) of Cal mag to the water every time I water. I held back for 2 waterings because my leaves were almost purple. Now I think I need to just give it normal strength again.

 

[No3odiesShad0w]

Ckbrew this is the recipe used. I have 4 gallon container so 3 gallon Coco 1 gallon petite 9oz of castings

 

[Ckbrew]

I did the brick thing the first year, I have better things to do with my time. PITA. The prepared bags of coco are much easier. Imo even the "pre buffered" stuff needs to be conditioned with calmag.

 

[No3odiesShad0w]

I guess the next run, I'll double buffer it in 150% cal mag (7.5ml/gallon). Just to be safe. This is why I avoided Coco for so long. So much extra work which I don't have the energy or health for.
I watered with 6.5 pH. Seems like it may have stopped getting worse. Need another day or so to be sure

 

[No3odiesShad0w]

Normally I got paragraphs of shit to say..... Not this time..... I'm BEYOND pissed. 3 weeks into bloom it went from beauty to zombie...... Beyond pissed

 

[9fingerleafs]

What ec or ppm are you giving the plant? What exactly are you feeding? In soil the bacteria is what's feeding the plant. In coco you have to provide nutrients directly to the roots thru osmosis, there's no bacteria to break down "organic" amendments.

Also I think you are wasting the CO2 because the plant can't use it right now. Only when the system is dialed in and the plant is super healthy with extra nutrients available and tons of light, then the CO2 can be used

 

[Ckbrew]

Have you checked for bugs? I have had good results with adding a touch or H2O2 to the feed water at the rate of 34% peroxide, 2.5ml/gallon every once in a while. It provides some extra O2 for the roots, and will help suppress fungus gnats if you have them. They tend to show up with excessively watered coco. If you have algae growing on the surface of the coco or on the perlite that is also a sigh of being to wet. I wouldn't be pissed, have a bowl and learn something from the experience.That is how we get better at things.

 

[Ckbrew]

Now that I looked at the pix again, it looks like they may be low on calcium.

 

[Rootsruler]

Coco is notorious for mag deficiency issues. Add in LED lighting and it multiplies. The pH looks fine to me. I don't think a .3 difference in pH is going to do much if your showing 6.2 going in/out.

To me it looks like more of an imbalance than a deficiency. The dark green leaves look like N tox but the brown spots and yellowing look like mag def.

I would back the light off some and do clear water feeds for the next few feeds to see if it clears up the imbalance.

Here's a mulders chart to help going forward with imbalance issues. As you can see, too much calcium pretty much interferes with availability of most everything else.

 

[Rootsruler]

One more chart that also might help with diagnosis.....