Phosphorus or Potassium during flower???
- Thread starter .Smoke
- Start date
homebrewer
Well-Known Member
It depends on your medium/growing method.
Saffasteve
Well-Known Member
Why's that ?
Hydro4life
Well-Known Member
If I was on my 1st grow, I wouldn’t worry too much on fine tuning your p or k ratios. If you have a good base nute then add a good bloom booster early to mid flower and the manufacturer should have done most of the work for you
keep it simple on your first grow and concentrate on having a good environment and keeping the plants happy and healthy. And remember with bloom boosters that a little can go a long way 
Good luck!
homebrewer
Well-Known Member
Because nutrient uptake is different depending on the growing method.
.Smoke
Well-Known Member
Medium is soil.
Renfro
Well-Known Member
Both, phosphorous for yield and potassium for terpene production (THC is a diterpene).
Saffasteve
Well-Known Member
No matter what you're growing in you still want P and K levels to be even or K slightly higher in the last 3 weeks,prior to that P levels should be higher than K but Ca is the most important nutrient for early flower
Hydro4life
Well-Known Member
An easy way to look at NPK is UP, DOWN, ALL AROUND
homebrewer
Well-Known Member
I'd use a veg formula from start to finish then. Halving the recommend dose is a good place to start.
It depends on your medium/growing method.
Hydro4life
Well-Known Member
Veg formula from start to finish? Never heard that one before......
Saffasteve
Well-Known Member
How did you come up with this theory ?
JayBio420
Well-Known Member
Start with increasing nitrogen in veg, Increase your P based on the size/growth of your plant at end of veg and during preflowering, increasing it during flowering, peaking just before maximum bud size, and K increases in relation to the change between veg and flowering, but plateaus in relation to the spike that P does.
That’s how I do it anyway. I’m really looking for more info and opinions on this myself...
That’s how I do it anyway. I’m really looking for more info and opinions on this myself...
homebrewer
Well-Known Member
19 years of practice. It's no 'theory'.
.Smoke
Well-Known Member
Just switched to a veg formula that is 17-18-28.
Soil is an organic mixed with a lttile Miracle Gro Potting Soil <I know...>
Have been feeding with a 24-8-16 so far for 6 weeks from seed now.
They <3 bag seeds> started out under old florescent basement lights and just went under a 315W CMH a couple days ago.
Net is 48"X48"X68"
Pots are 17 Gallon.
I'm thinking maybe another month for Veg?
What do you all think?
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Hydro4life
Well-Known Member
Your theory has me stumped tbh Homebrewer lol. Do you add bloom boosters through flower? I’ve accidentally used veg nutes in flower instead of bloom. and the plants/leaves showed faint signs of nitrogen toxicity and buds didn’t swell/put on weight. If this were the case then why does every other plant require potash etc. Or the likes, to assist in flower/bud/fruiting? Or is MJ in a class of its own?
Sorry man, but I don’t get your theory.
homebrewer
Well-Known Member
I'd stick with your 24-8-16 and keep doing what you're doing. Your plants look great.
That's operator error. If you're overfeeding plants with ANY formula that will definitely affect flower production.
In regards to plants in containers requiring potash, veg formulas supply plenty. You can add more if you'd like, say potassium sulfate for example, but it wont increase your yield, only add sturdiness to your branches.
budman111
Well-Known Member
I have done it, just add PK in flower it's all that it essentially is, without the PK added.
.Smoke
Well-Known Member
Will do.
Maybe throw in a little bloom boost in during flower?
homebrewer
Well-Known Member
I'd recommend against that.