I use Master Blend 4-18-38
Calcium Nitrate-15.5-0-0
Epsom Salts
Kelp-Azomite for Micros
I use it at small, slowlly increasing amounts all the way through until the last 2 weeks of harvest.
Say I have an 8 weeks flowering strain.
I would start with a highly diluted amount, as soon as they pop the soil. And about every week, if everything is going good, I will, just by a tiny amount, increase all nutrients, and as I said. Very Slightly. I never water/feed full strength, and always feed, when I water.
When I flip them? I change Nothing. I just slowly, increase feed of Base formula. Calcium Nitrate- Epsom salts. Same steady path.
At 2.5 weeks, I will give them a Slight MPK Boost. 0-52-34.... I will do this, through week 4. At weeks 5-6, I drop the MPK, they get a slight Epsom Salts Boost, and as I said. The 2 other fertilizers, are also still getting an ever so slightly increase in strength, up until week 6. Even if it is only a /couple/few tenths of a gram, per week. I try and keep them healthy, with the least amount of fertilizer possible, but also at the same time, never cut them short, and give them everything they need.
In week 7, ALL fertilizer gets cut back by 25%. Week 8, ALL fertilizer gets cut back, another 25%.
I do like the added micros, from the Kelp, and Azomite, mixed in the soil. Kelo, also has a growth hormone, that stimulates growth. Between Kelp, and Azomite, they will have every Micro, thats needed.
I use
Promix BX, as a Medium.