In the future, this is what I'd do- if you have to go out of town, make up a big jug of the most MINIMAL mix you'd use. Not the base fert though- chemicals can interact badly in solution. You can always resume fertilizing when you get home, and it's not going to make a big difference in yield to miss ~2 feedings. On the times I've had to leave the plants with a sitter, I've left jugs of nothing but tap water, calmag, and a little molasses. The calmag and molasses don't interact significantly. That way no well-intentioned friend can screw up my crop!