Effective delivery of an insecticide to a growing plant can sometimes beproblematic. Topical delivery of an insecticide at the post-emergence stage ofgrowth can sometimes be ineffective. It can also be difficult to deliver aninsecticide to the roots of a growing plant, such as to combat a subsurfaceinsectinfestation. Accordingly, soil blends having insecticidal activity cancomprise asoil medium, a porous soil additive, and an insecticide dispersed within thesoilmedium. Such soil blends may be used in conjunction with cultivating a varietyof plants. Methods for producing the soil blends can comprise providing a soilmedium and a porous soil additive, and dispersing the porous soil additive andan insecticide within the soil medium.