I use the MG premixed in the bottle that you run thru the hose. I water them with it every time I water. It is half the strength of the powdered MG mixed up per directions. I mix up the blue stuff at half strength to refill with. Once a month or so, I water with the full strength MG, but not this time of the year. I stick with the ' weakly weekly' routine.
Milorganite twice a year. Lime and some minor elements when planting. In the spring, I might throw some dynamite on them.
I always water in my seedlings with MG seedling starter, and put some plantone in the hole.