I usually just fertilize once when I plant as I check my plants at regular intervals, 9ish and 3ish Pacific time.

Sometimes I will fertilize flowerpot crops to bring them from 3:PM to 9:AM, but only T onions could be brought to 3:PM from 9:AM and I am just not that diligent. Nor am I diligent enough to bring a 3:PM garden bed from 3:PM to 9:AM although it can be done with my schedule.