Sunleaves liquid guanos are easy to apply and extremely effective. Derived from bats, the Liquid Mexican Guano encourages robust vegetative development and can be applied as either a foliar spray or directly onto soil. For bigger blossoms and juicier fruits, try Liquid Peruvian Seabird Guano, which can also be applied as either a foliar spray or directly onto soil. Both have the active ingredient of kelp extract, which will provide natural matter as food for soil microbes. It's also the only liquid guano with a fresh spearmint scent.