It sounds like you're asking because you don't plan to get to your plants very often, sort of a plant them and come back later to harvest, is that right? Hopefully they will be in a place they get enough sun and your climate gives them enough water. Maybe you're concerned about lugging water back and forth, which is very difficult. But it just sounds like you're hoping not to have to deal with it.
Are you intending to check them at all, even in mid August to check for males? How many plants are you talking about total?
If you are going to check them at all there might be an option to help them along. My experience in adding powder nutes to the top of the soil and letting rain wash it down was that we had a week of rain right after and it burned the plants to death- but it was chemical/synthetic plant food. Maybe if you are going to check your plants a few times during veg and you could even get a half gallon of water out there with a pretty concentrated organic veg mix you could wet the top soil and then let the rain carry it down as it comes. Then, during flower a couple of the same feedings with organic flower mix would help too. I'm just reading into why you might be asking. Carrying gallons of water to a site is very difficult and it might be one option to take a little bit of concen