Got the general flex schedule instructions. Found my soil type. Was ready to try to program this, but we are getting our first rain in nine months. Hoorah for that.
My root depth is not so easy.
My front yard is grass and mature trees.
My backyard slope is steep, barely walkable without slipping or falling. It has mature walnut trees with English ivy and vinca major as ground covers, mostly in the shade of the trees. Four of the five hill sprinklers serve mostly shady areas under those trees.
One sprinkler serves a mainly sun exposed area where almost everything I’ve tried to grow has done poorly. Currently it’s red apple, a low growing slowly spreading succulent that was starting to catch on until the California drought.
What are the root depth recommendations for those three areas?