Wait and see if they leaf out next year. Fall is a better time to fertilize hardy plants than spring, but if drought is the problem fertilizer is not the solution.

if they are already stressed ... heavy fert may put them over the top toward death .... food is not the answer to a water problem .... or .. if you found a man in the desert ... would you cram food down his throat.. or give him water?????

very light application and start watering them at the appropriate time ....

ken