I just put Penningtons all purpose fertilizer on my tomatoes, squash, cucumbers, and peppers. It is 6-10-10. Is this a good fertilizer? I sprinkeled the little granuals around the base of the containers and it has rained at least once a day for the past three days since it was applied.

Since then I have notices some of my female squash shriveling before the flower even opens, or they even have a chance to get pollinated. Could this be from the fertilizer or something else?