What ppm should I be feeding for flower?

ddeck96

ddeck96

Well-Known Member
I’m on week 6 of a 9-10 week strain. I’ve heard people say you don’t really want to go above 700. But I’ve also heard people say they’re using 1000+ ppm. (Using .5 conversion chart, same as me).
I’m giving my plants plenty of phosphorus and potassium, but still seeing deficiencies. My PH is in range as well (5.8). Can anybody clear this up for me? Growing in RDWC hydro btw.
 
ddeck96

ddeck96

Well-Known Member
hotrodharley said:
Stay at 850 or below since you’re asking. Drifts to 950 or so are managed by the plants much easier. Yes there’s guys who run higher. Some have claimed 1360. Ain’t buying it without proof including pictures.
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hey just one more quick question. Say my plants are suffering a P deficiency, would it be okay to take a nutrient high in Phosphorus such as flora bloom, dilute it in water, and add it to the res? Or would I need to add the whole regimen of nutes with an increase of phosphorus?
 
hotrodharley

hotrodharley

Well-Known Member
ddeck96 said:
hey just one more quick question. Say my plants are suffering a P deficiency, would it be okay to take a nutrient high in Phosphorus such as flora bloom, dilute it in water, and add it to the res? Or would I need to add the whole regimen of nutes with an increase of phosphorus?
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Your EC is your guide. I routinely topped off reservoirs and adjusted solution on the fly. I’d say do it. Within reason of course.
 
hotrodharley

hotrodharley

Well-Known Member
In fact you might look at a PK boost. Top up with water, check EC. Adjust up to 850-900 with your PK. Probably need potassium as well and keep from raising either too high. Don’t cause lockout.
 
Rurumo

Rurumo

Well-Known Member
ddeck96 said:
hey just one more quick question. Say my plants are suffering a P deficiency, would it be okay to take a nutrient high in Phosphorus such as flora bloom, dilute it in water, and add it to the res? Or would I need to add the whole regimen of nutes with an increase of phosphorus?
Click to expand...
If you're feeding any normal base nutes, you shouldn't ever see a P deficiency. Are you checking your PH?
 
ddeck96

ddeck96

Well-Known Member
hotrodharley said:
In fact you might look at a PK boost. Top up with water, check EC. Adjust up to 850-900 with your PK. Probably need potassium as well and keep from raising either too high. Don’t cause lockout.
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damn homie, we’re on the same wavelength or some shit cuz that’s exactly what I just did. (Gradually, of course, as to not shock my plants with a rapid increase of ppm)
 
ddeck96

ddeck96

Well-Known Member
Rurumo said:
If you're feeding any normal base nutes, you shouldn't ever see a P deficiency. Are you checking your PH?
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yeah, I calibrate my pen every other day. It reads 5.8. Ph. I think my problem was I was feeding too low. Only 625ppm.
 
ddeck96

ddeck96

Well-Known Member
ddeck96 said:
yeah, I calibrate my pen every other day. It reads 5.8. Ph. I think my problem was I was feeding too low. Only 625ppm.
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oh and my EC/ppm meter was acting up cuz of low battery, so I wasn’t noticing the drift. Yesterday I put in new batteries and calibrated it and noticed a massive drift. (Also the P deficiency was just and off-topic-side-note, I was experience N-P-K and Ca deficiencies as well). You live and you learn I guess. I’m just so crushed I I managed to screw this grow up so badly :( will definitely not yield half as much as I had hoped. Maybe someone on this site will be kind enough to mentor me next time :)
 
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