There are many types of fertilizer out there and the organic ones are the best out there. Guano and bloodmeal are great sorces of nitrogen, phosphorus and potassium for your plant. Organic fertilizers are so much better than the chemical ones because the organic ones can alctually supply a great source of nutrients to the plants up to an entire season as opposed to just getting the nutrients for the momen and after a rain storm you have to apply it again.