Miracle Gro Fish, Blood + Bone All Purpose Plant Food is, as its name suggests, a great all-purpose plant food that can be used all round the garden. It boosts soil fertility & promotes healthy growth. Key Features Organic nitrogen slowly & steadily releases for up to 8 weeks, encourages strong growth & healthy rich green foliage Phosphate slowly & steadily releases to promote vigorous root growth Potassium promotes flower production & improves ripening of fruit & vegetables