<li id="jsArticleStep1"> Because neem is an organic insecticide, its residue will last for a shorter time in the garden than that of other, stronger products. It also does not enter plants' systems as extensively as other chemicals. This means you need to apply neem more frequently than other insecticides. The exact interval for applications will depend on the severity of your insect infestation. You can spray it as often as you wish to control the number of bugs in the garden. Keep in mind, though, that it may take up to a week to see a reduction in the insect population after the first application of neem; give it time to work.
i like spraying neem even if i dont have insect issues helps keep plant leafs nice and green especially on new cuttings or clones i received i will isolate them and neem extensively 2 weeks prior before letting them into general population