This fertilizer is great for all stages of plant growth and is the same product we use in our Bloom Box. It is formulated to produce strong stems and large blooms without mush internodal stretching. You can incorporate it when planting and also use it as a top dressing around the root zone of the plant during the growing season. This will also help with health tuber development to enhance the storage ability of the tubers. This bag is 2 lbs of fertilizer