I swapped 500 sq ft of my front lawn in Sacramento this spring for a mixed native hedge (ceanothus, manzanita, toyon) to boost shade, wind buffering, and stormwater infiltration. My soil sensor shows the hedge bed running about 6°F cooler at 3 pm than adjacent turf, and pollinators are already busy there. Anyone else measuring microclimate or runoff after similar swaps, and which species held up best during August heat?
Same swap in East Sac — 400 sq ft — and my SensorPush at 2 in depth matches your “6°F cooler at 3 pm”; a simple 6 in curb cut to a shallow swale cut street runoff about 40% in March storms. Small caveat: manzanita sulks with heavy mulch; keep it thin at the crown and water deep/infrequent the first summer (good notes: https://arboretum.ucdavis.edu/arboretum-all-stars).
“6°F cooler at 3 pm” tracks — my IR gun shows foliage 10–12°F cooler; 3" mulch boosts infiltration; keep manzanita crowns high.
I put a HOBO Pendant 4 ft behind my ceanothus in Curtis Park and my west wall stays about 8°F cooler after 5 pm; “mulch boosts infiltration; keep manzanita crowns high.” and a 12" gravel strip along the sidewalk cut glare heat and guided curb-cut flow into a shallow basin. Small caveat: my ceanothus got cranky with midsummer watering, so I tapered quickly once roots grabbed — have you logged night humidity yet?