Please realize my zone....do not try this in lower zones. I usually fertilize heavier in the fall...here the plant is getting ready for next year. I also think that much is dependent on your area in the summer, here fertilizer is "hot"...and laying on top of the soil...can just make the ground soil hotter. But that is not true for all areas.
Because there is a longer growing season here, spring fertilizing is not enough. I use water soluble fertilizer in the summer, weaker strength, a little more often, and apply it after watering. Length of growing season, soil, rain, temperatures-- especially night temperatures greatly vary from place to place, I think you have to figure out what works best for your own situation.
It is great to have these dialogues from such diverse areas.
May goodness and kindness follow you!