Dilute in half for soil use I think. That is, one cup of spray to one cup of water. Then soak soil every 3-4 days. The mixture will keep for at least a week or longer in a closed container in the fridge or even in cool spot as the weather is about to fall on its ear again. I would discard any diluted mixture after a week of hot weather if kept at room temperature. Or possibly donate it to the street tree or another outside plant.