Watering is a good idea during these early hot, dry spells. Check to the soil by sticking your finger an inch below the surface. Water if the soil is dry. Wait of fertilizing. Fertilizing will promote more tender, early growth. We could still get a cold snap that could damage new growth. There is no need to promote additional growth this early.
Thank you so much for your detailed answer. when should I feed my plants then?
Late May to early June when we have passed our average last frost date and plants are pushing growth is usually a good time.
Here's some more information on fertilizing from Plant Talk Colorado: http://planttalk.colostate.edu/topics/trees-shrubs-vines/1720-when-to-fertilize/