Plants that thrive in Phoenix, AZ
Phoenix landscapes work when the plants are true Sonoran or comparable arid-climate species and the design accounts for reflected heat off walls and paving. Desert Museum palo verde, red bird of paradise, cenizo, deer grass, golden barrel cactus, agave, desert milkweed, and trailing lantana are the dependable core. The two things that kill more Phoenix plants than drought are an unbroken caliche layer trapping water around the roots, and a west-exposure microclimate nobody accounted for.
Phoenix growing conditions at a glance
- USDA hardiness zone
- 9b
- Region
- the Sonoran Desert and the Valley of the Sun
- Rainfall
- roughly 8 inches a year, split between winter rain and summer monsoon storms
- Soil
- alkaline, low-organic desert soil, frequently with a hard caliche layer a foot or two down
- Hardest condition to design around
- reflected heat. A west-facing wall or a stretch of decorative rock can push the air next to a plant 15 degrees above the reported high
Shade trees and large shrubs
In Phoenix, shade is the highest-value thing a plant can produce. Place these to shade west walls and paving first.
Desert Museum Palo Verde
Parkinsonia x 'Desert Museum'
- Sun
- Full sun
- Water
- Low, once established
- Mature size
- 20 to 25 ft tall and wide
Caveat: Thornless and fast, which is why it is planted everywhere, and the speed is the problem. Overwatered it grows brittle wood that breaks in monsoon winds, so taper irrigation after year two and prune for structure early.
Red Bird of Paradise
Caesalpinia pulcherrima
- Sun
- Full sun
- Water
- Low
- Mature size
- 6 to 10 ft in a season
Caveat: Blooms hardest in the worst heat, then freezes back most winters in the Valley and looks like dead sticks until it is cut to the ground in late winter. Plan the design knowing it is absent from December to April.
Texas Sage (Cenizo)
Leucophyllum frutescens
- Sun
- Full sun
- Water
- Very low
- Mature size
- 4 to 8 ft tall and wide
Caveat: Blooms in response to humidity, so it flowers unpredictably around monsoon storms rather than on a schedule. It is also the most commonly over-sheared shrub in Phoenix; shearing it into a ball removes the flowers and shortens its life.
Cactus and succulent accents
These carry the design year-round and need essentially no supplemental water once established.
Golden Barrel Cactus
Kroenleinia grusonii
- Sun
- Full sun to light afternoon shade
- Water
- Very low
- Mature size
- 2 to 3 ft over decades
Caveat: It sunburns. On a reflected-heat west exposure the south-facing side can scar permanently, so give it light afternoon shade and never rotate a plant after it has acclimated.
Blue Glow Agave
Agave 'Blue Glow'
- Sun
- Full sun to part shade
- Water
- Very low
- Mature size
- 2 ft tall and wide
Caveat: Smaller and better behaved than Agave americana, and it does not pup much, so you get one plant rather than a colony. It is monocarpic, meaning the rosette dies after it blooms, so budget to replace it eventually.
Desert Milkweed
Asclepias subulata
- Sun
- Full sun
- Water
- Very low
- Mature size
- 3 to 4 ft
Caveat: A monarch host plant and a striking vertical form, but monarch caterpillars will strip it to bare stems in season. That is the plant working as intended, not a pest problem, so do not spray it.
Grasses and groundcovers
Softening elements that keep a desert design from reading as all rock and spines.
Deer Grass
Muhlenbergia rigens
- Sun
- Full sun to part shade
- Water
- Low
- Mature size
- 3 to 4 ft tall and wide
Caveat: The safe alternative to invasive fountain grass, and it needs a hard cutback every two to three years or the center dies out. Cut it to 6 inches in late winter.
Purple Trailing Lantana
Lantana montevidensis
- Sun
- Full sun
- Water
- Low
- Mature size
- 12 to 18 in tall, 4 to 6 ft wide
Caveat: Freezes back in a Valley winter and returns from the roots, so it is bare for part of the year. Berries are toxic to pets and children.
Damianita
Chrysactinia mexicana
- Sun
- Full sun
- Water
- Very low
- Mature size
- 12 to 18 in mound
Caveat: Thrives on neglect and dies from drip emitters left on a lawn schedule. Give it its own low-frequency valve if the rest of the yard is watered more often.
Vines and screening
Vertical cover for block walls, which is where reflected heat starts.
Pink Bower Vine
Pandorea jasminoides
- Sun
- Part shade to filtered sun
- Water
- Moderate
- Mature size
- 15 to 20 ft
Caveat: It is one of the few attractive vines for Phoenix but it is not a full-sun west-wall plant; it scorches. Reserve it for east or north exposures and expect it to need more water than the rest of the yard.
Baja Fairy Duster
Calliandra californica
- Sun
- Full sun
- Water
- Very low
- Mature size
- 4 to 5 ft tall and wide
Caveat: Blooms nearly year round in the Valley, but it gets woody and open with age. Prune out a third of the oldest wood each winter rather than shearing the outside.
What should you not plant in Phoenix?
Skip fountain grass (Pennisetum setaceum), which is invasive across the Sonoran Desert and a fire hazard, and skip olive and male mulberry where local pollen ordinances restrict them. Also think hard before planting Mexican palo verde (Parkinsonia aculeata): it seeds everywhere and is thorny.
What are the watering rules in Phoenix?
Most Valley cities have permanent low-water landscape requirements for new development and offer turf-removal or smart-controller rebates through local water providers and SRP. Drip irrigation on a seasonal schedule is the norm here, not an upgrade, and new desert plants still need regular water for their first two summers.
Water rules and rebate programs change. Confirm the current stage and schedule with your local water provider before relying on it.
Questions
What plants survive Phoenix summer heat?
Desert Museum palo verde, cenizo, red bird of paradise, golden barrel cactus, agave, desert milkweed, deer grass, damianita, and Baja fairy duster all survive Phoenix summers above 110 degrees. The bigger variable than the air temperature is reflected heat: the same plant can thrive on a north exposure and cook against a west-facing block wall.
What is caliche and how does it kill plants in Phoenix?
Caliche is a hardened layer of calcium carbonate common in Valley soils, often a foot or two below the surface. It is nearly impermeable, so water poured into a planting hole above it has nowhere to drain and the roots sit in a bathtub. When planting, dig through the caliche layer or move the plant, because no amount of correct watering fixes a hole that cannot drain.
How much water do new desert plants need in Phoenix?
More than most people expect. Native and desert-adapted plants are only drought tolerant after they are established, which takes about two summers here. Plan on regular deep drip irrigation through the first two hot seasons and then step the schedule down, rather than treating a new planting as low-water from day one.
Which plants should I avoid planting in Phoenix?
Avoid fountain grass (Pennisetum setaceum), which is invasive across the Sonoran Desert and carries fire into landscapes, and be cautious with Mexican palo verde, which is thorny and seeds aggressively. Some Valley jurisdictions also restrict olive and male mulberry because of pollen ordinances, so check locally before specifying either.
Want a plant list matched to your specific yard rather than Phoenix in general? See how Dream Landscaper designs against your actual conditions, or skip ahead and get your free concept.
Other city plant guides
11 plants covered. Mature sizes and water needs are typical ranges for the Phoenix, Arizona area and vary with microclimate, soil depth, and care. Nothing here is a substitute for a soil test or local extension advice.