it depends if you buy the diluted spray or if buy the pure oil. A professional mixture is .9-1.5 % neem tree oil and the rest is water/ inert ingredients. This is what you will find to be true of most varieties of neem spray(which is what I use).do i have to dilute the neem oil with water?
well, i would try it on one section of the plant and see how the plant reacts. i haven't had to use neem during flowering yet anyway.thanks joe! also i am into beginning of week two flower...is neem alright for this?