It won't come to one day. If they really are in need for water (ie, leaves drooping down), then give them some water.
Go out tomorrow and get yourself some fresh compost. There must be something open tomorrow where you can get some? We can even get it in our local waste sorting center, don't know how to call it in English. But it's where the people go in the weekends, with their trailers filled with garden waste.
It's the bennies in the compost what you're after. The Bio PK is a perfect nutrient, but you need the bennies to convert them for best results