Due 2 cows im forced to start over my question is do i have to fill the pots all the way to top or can i do it 3/4's full with blood meal..
Blood meal is a fertalizer not a soil. It will either not grow or most likely die from too much nitrogen.
Lmao, I didnt realze. If youve got cows the dirt should be pretty furtile, just mix some of the meal in with it. 12 inch is plenty big enough. The plants would stretch until they got past the rim of the pot