Citrus in the AZ Backyard — Planting, Watering, and Why So Many Die
Citrus is the most-planted and most-killed tree in Phoenix backyards. Here's the irrigation, soil, and frost spec that actually keeps them alive.
Planting depth and timing
Plant Feb–April or Oct–Nov, not summer. Hole 2x the root ball wide, same depth — graft union 4" above finished grade. Backfill with native soil, no amendments (citrus prefers AZ alkaline soil). Build a 3-ft watering basin.
Irrigation that works
Deep, infrequent. Year 1: every 7–10 days summer, 14–21 days winter. Year 2: every 10–14 days summer. Mature: every 14–21 days summer, deep soak (2–3 hrs on bubblers). Frequent shallow watering = shallow roots = dead tree in the first 115° week.
Frost protection
Lemons and limes drop fruit below 32°F. Wrap trunk with frost cloth (not plastic) when overnight lows hit 30°. Water the day before a freeze — moist soil radiates heat. Citrus under a pergola or near a south-facing wall handles cold better.
Common kills
Drip line buried at root ball forever — never expands with the tree. Lawn sprinkler hitting trunk daily — rot at the graft. Heavy mulch piled against trunk — same. Fertilizer burn from over-application. Spider mites untreated in summer.
What we actually plant
Lisbon lemons, Bearss limes, Washington navels, Arizona Sweets, kumquats. Avoid grapefruit on small lots (too large at maturity). Buy from a local nursery, not a big-box rack — Bach's, A&P, Berridge are AE's go-tos.
