My garden i put sheep manure and blood and bone meal in. I do this about 30 days before planting up to the day before planting and always in the fall as well. I usually use about 2 kilos of blood meal and 2 kilos of bone meal and the garden space is about 22' x 35' I also use about a half ton of manure each time. I just spread it over the garden as even as I can get it and turn it once or twice. The blood and bone meal are slow release fertilizers so they will not give immediate effects but with this practice I am not adding any fertilizer to tomatoes, peppers, cucumbers, melons, onions, only to garlic.