I put the Milorganite and slow release fertilizer out the first of March on the established plants. No need to water as we had 11 inches of rain in February and are on course for the same in March...raining right now!
When my spring goodies arrive in a few weeks I will place a bit of the Milorgnite and alfalfa pellets in the hole and plant. I place a bit of soil over the mixture so that the roots are not in direct contact. I've heard that neither Milorganite nor alfalfa pellets will burn, but my weather is super hot and humid in the summer.