I've been using Jack's chemical fertilizer with a drip irrigation system, and now I'm transitioning to organic options. My nutrient sources include fish hydrolysate for nitrogen, and I'm looking for a good phosphorus source. I've got BioAg for potassium and micronutrients, along with either seaweed or Tm-7 for additional support. Can anyone suggest where I can find phosphorus for my setup? Also, I'm trying to figure out how to make stock for my 1:100 injector, any tips?
3 Answers
You might want to try MKP fertilization! For phosphorus, you can target around 2g per gallon. Just dissolve about 2.2 lbs or 1 kg in 5 gallons of water for a good stock. If you're aiming for a stronger dose, 4g per gallon would be 4.4 lbs or 2 kg in the same amount of water. This should work well with your injector at a 1:100 rate!
There aren't too many liquid organic phosphorus options out there, but I've had success with Pro-Phos. If you're curious about DIY, you could also brew and filter guano or powered bone meal, though I’m not sure how effective those are based on research. Just something to consider!
Have you thought about buying bulk organic fertilizer? BioAg 3-3-2 works wonders in my experience. I do have to rinse out some sediments occasionally, but using a filter or straining it before adding to the container helps. Sometimes I mix in a bit of Miracle-Gro tomato food for micronutrients too. Super simple setup!
Which specific BioAg 3-3-2 are you using? They offer a TM-7 version too, right?
Is that specifically for phosphorus? If I want to make stock for just one gallon, do I just divide those amounts by 5?