Grouping Plants by Water Needs: Hydrozoning with Irrigation Zones

Amend all soil with organic matter. Then group plants by water use: high (lawn, annuals), moderate (most shrubs), low (natives, succulents). Assign each group to its own irrigation zone. Program run times accordingly. Dry-zone plants in the low-water zone. This prevents overwatering drought-tolerant plants and underwatering thirsty ones.