A lot of the ones available for systemic use are in granular form and instructions recommend working the granules (at least the one by Bonide did) into the 1-2 inches of soil. Well when I have a top dressing that sits on top of the soil...that's a lot of rocky top dressing to scrape away section by section to work the soil...
Guess, I will continue looking for a systemic that can work just as effectively placed on top of the dressing and watered in...???
Thanks all for liking my semp bed. I've been combing thru it so that I can figure how much space is left and thus how much semps I can indulge buying at PO and at Canby Fair in May....