Week 8 - Late flower phosphorus deficiency ?

11Hick11 · Aug 21, 2020

I think I know when & what happened but Im not for sure. I wanted to see what everyone else's thoughts were on this. Any help is much appreciative.
It appears to be P deficient and I think Cold water was the reason this happened??? Would "Cold water" cause a P deficiency like this?
Also, should i still feed hi P amounts this late? Not quite sure as to how or if i can fix the issue.

Grow: https://www.thcfarmer.com/threads/to-get-my-mind-off-this-cv-shit-grow.110992/page-2#post-2476233

Milson · Aug 21, 2020

What is your pH?

11Hick11 · Aug 21, 2020

6 to 6.5. I use the drops. Mostly 6.5 ish. When i add nutes sometimes its hard to tell but its close to 6.5.

GNick55 · Aug 21, 2020

could be light burn,
overwatering/feeding.
time to knock stuff off the checklist!
start with easy fixes first.
you know what you have been doing..

Zilla420 · Aug 21, 2020

I say it don't matter now! Cure it and start again. Lol

GNick55 · Aug 21, 2020

Zilla420 said:
I say it don't matter now! Cure it and start again. Lol

GNick55 said:
could be light burn,
overwatering/feeding.
time to knock stuff off the checklist!
start with easy fixes first.
you know what you have been doing..

you using LED’s?

Milson · Aug 21, 2020

11Hick11 said:
6 to 6.5. I use the drops. Mostly 6.5 ish. When i add nutes sometimes its hard to tell but its close to 6.5.

Oh sorry I meant from runoff.

Aqua Man · Aug 21, 2020

Thats a Potassium deficiency not a phosphorus deficiency and no I highly doubt its from cold water.

Are you adding calcium still? What nutrients and how much? Media? And watering practices?

Milson · Aug 22, 2020

Aqua Man said:
Thats a Potassium deficiency not a phosphorus deficiency and no I highly doubt its from cold water.

Are you adding calcium still? What nutrients and how much? Media? And watering practices?

Thank you for saying it. I was curious if the pH had dropped so far that K absorbtion was inhibited.

11Hick11 · Aug 22, 2020

Not sure of the runoff PH , will check next water. I only checked the runoff ppm and it was a bit above 1400. I stopped the Cal Nitrate but kept the Mag when i started using the nutes.
Feed, Feed, Water till 20% runoff (2 gal every other day) When only water I dont add anything, just plan RO at about 8 ppm.
Feed: eqauls roughly 600 to 700 ppm
Botanicare Pure Blend Pro @ 10ml gal
Botanicare Sweet Raw @ 8ml gal
Epsom @ 0.64 grams per gal
Soil: FF Straberry Fields in a 7 gal

Milson · Aug 22, 2020

I would water to runoff with pH'd water and check when you next water. I suspect you have a buildup that has thrown your pH too low and inhibited K absorbtion. A flush would be the fix.

11Hick11 · Aug 22, 2020

Tried to gets some better lighting pics.

Light is HLG 320xl 35k, no red or blue.

11Hick11 · Aug 22, 2020

GNick55 said:
you using LED’s?

Yes, HLG 320xl @ 35k, no red or blue.

11Hick11 · Aug 22, 2020

Aqua Man said:
Thats a Potassium deficiency not a phosphorus deficiency and no I highly doubt its from cold water.

Are you adding calcium still? What nutrients and how much? Media? And watering practices?

Thanks for clearing that up. These were N toxic in veg. Things are kind of adding up to me a little now (or im overthinking as usual, lol) to much N will change the availability of K right? Maybe i never fully cleared that up? And then thinking i was bringing out some color but it was actually the signs of a K deficiency?

Aqua Man · Aug 22, 2020

I would not water with pure RO. Just feed at like 400-600ppm with good run of. How often are they being watered? It looks to me like they may be drying out to much.

11Hick11 · Aug 22, 2020

Aqua Man said:
I would not water with pure RO. Just feed at like 400-600ppm with good run of. How often are they being watered? It looks to me like they may be drying out to much.

I need to fix my bad habit with RO. I think ive read that posted by you a thousand times but i always forget.

2 gallons every 2 days right now. She will completely fall over if i miss watering by about a 6 hour window. To me it seems like she is drinking a lot and fast. Its been that way for a few weeks now. Im concerned about overwatering but if i dont water at a givin time it takes a bit to get her to stand up again lol.

Aqua Man · Aug 22, 2020

11Hick11 said:
2 gallons every 2 days right now. She will completely fall over if i miss watering by about a 6 hour window. To me it seems like she is drinking a lot and fast. Its been that way for a few weeks now. Im concerned about overwatering but if i dont water at a givin time it takes a bit to get her to stand up again lol.

What size pots and what media? I really do think its under watering. If they are drinking that fast I feel like the risk of over watering is fairly low.

11Hick11 · Aug 22, 2020

Aqua Man said:
What size pots and what media? I really do think its under watering. If they are drinking that fast I feel like the risk of over watering is fairly low.

7 gal fabric pots, Fox Farm Strawberry Fields

Aqua Man · Aug 22, 2020

11Hick11 said:
7 gal fabric pots, Fox Farm Strawberry Fields

Are you getting run off when you water?

TheKushie · Aug 22, 2020

Looks like underwatering and light stress. Nice fat flowers though good job.

Week 8 - Late flower phosphorus deficiency ?

Week 8 - Late flower phosphorus deficiency ?

11Hick11

Milson

Milsonian

11Hick11

GNick55

Zilla420

GNick55

Milson

Milsonian

Aqua Man

Milson

Milsonian

11Hick11

Milson

Milsonian

11Hick11

11Hick11

11Hick11

Aqua Man

11Hick11

Aqua Man

11Hick11

Aqua Man

TheKushie

Week 8 - Late flower phosphorus deficiency ?

Week 8 - Late flower phosphorus deficiency ?

11Hick11

Milson

Milsonian

11Hick11

GNick55

Zilla420

GNick55

Milson

Milsonian

Aqua Man

Milson

Milsonian

11Hick11

Milson

Milsonian

11Hick11

11Hick11

11Hick11

Aqua Man

11Hick11

Aqua Man

11Hick11

Aqua Man

TheKushie

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