Amending Soil With Blood Meal
Last summer we installed a 16' x 28' greenhouse. We added topsoil on the crushed granite. It did well considering the late start and I'm learning a lot about greenhouse gardening. I just had the soil tested (MSE in Butte) and the pH is 7.6; lbs/acre = N:22.4, P:886, K:2160. So they recommended N at the rate of 2 lbs/1,000 square feet. My two questions are: should I add 1 pound of blood meal and can/should I till it into the soil?
As you know, analyses of fertilizers vary a bit by manufacturer and I do not know what the nitrogen content is of your particular brand of blood meal. If it is 12%, then you will need to apply about 16 pounds of it per 1000 square feet of soil surface area for the approximate equivalency of 2 pounds of nitrogen over that area. Don't till but rather scratch the meal into the top few inches of soil before planting.