Flower Shield from auto lawnmower

I find ou that my Auto lawnmower keeps going and destroying my mother's flowers(They are too small to detect). Hole in ring allows to put your flower inside ring, and 3 spikes need to go inside dirt(simply push em). I left 10CM above ground to block lawnmower. printed on 0.28mm layer height 15% infill with Elegoo ASA Black at 50mm/s it took me 5h to print i used brim because it was lifting on my kobra s1.