I agree with Italiano. With soil amendments, you really have to monitor the health of the plant to determine whether or not they need extra nutrients. Bat guano is an excellent soil ammendment, for sure, but if needed you can also make a tea out of it and fertilize like you would with any water soluble fertilizer. I use guano, and I eventually end up doing that every single grow. When to do it will depend on when your plants need it, so keep a careful watch on them.

Best of luck! :jointsmile: