Red Push pistache is one of the easiest shade trees for hot, dry yards, and it asks mainly for sun, drainage, and patience. It is a hybrid of two wild pistachio relatives, bred for vigor rather than nuts.1Arid Zone Trees. How to Grow and Care for a Red Push Pistache Tree That toughness shows in harsh city settings: in a low-income tree-planting program in Tucson, it was among the best survivors.2Digital Commons at Loyola Marymount University and Loyola Law School. Low Income Urban Forestry Program in Tucson, Arizona, USA The care that matters most is restraint with water, since soggy soil hurts it far more than drought.
Where Red Push Pistache Grows Best and How Big It Gets
Red Push is rated for USDA hardiness zones 7 through 10. Within that range it handles both cold winters and intense summer heat.3Legacy Tree Company. Red Push Pistache Look up your zone by ZIP code on the USDA map before you buy.
Zone 7 sits at the cold edge, so in the coldest yards a young tree does better in a sheltered spot. Coastal or humid areas inside the range are a weaker match than dry ones, because wet air and wet soil are what the tree dislikes most.
Most trees reach 25 to 40 feet tall with a canopy 20 to 30 feet wide.4Arid Zone Trees. How to Grow and Care for a Red Push Pistache Tree Some nurseries give a smaller 20 to 30 feet for height, and some spreads reach 40 feet.5Moon Valley Nurseries. Red Push Pistache Plan for the larger numbers. A tree that ends up smaller costs you nothing, while one that outgrows its spot is hard to fix.
Plant at least 15 feet from the house so a 30-foot canopy fits, and keep it clear of overhead power lines. For shade over a patio or lawn, allow a circle 20 to 40 feet across.
Growth is moderate at first, then picks up once the roots are established.6Yardwork. Red Push Pistache Tree (Pistachia Red Push) A young tree looks open and gangly, then fills into a broad, dense shade canopy with age.7Arid Zone Trees. How to Grow and Care for a Red Push Pistache Tree Real shade usually arrives after several seasons.
Choosing the Planting Spot and Soil
Red Push needs full sun.8Moon Valley Nurseries. 7 Best Fast Growing Trees for Vibrant Fall Color It struggles in shaded areas,9UA Campus Arboretum. Find Trees & Learn | UA Campus Arboretum so pick the sunniest open spot in the yard. Watch the spot through a full day, since a place that is bright at noon may be shaded by a wall or a neighbor’s tree for much of the morning or afternoon.
The tree grows in clay, loam, sand, and chalky soils,10Green Things. Pistacia X ‘Red Push’ (Red Push Pistache) and it tolerates acidic, neutral, and alkaline soil.11Green Things. Pistacia X ‘Red Push’ (Red Push Pistache) It does not tolerate salty soil.12UA Campus Arboretum. Find Trees & Learn | UA Campus Arboretum Drainage matters more than soil type, because root rot develops in soil that stays saturated.13UC IPM. How to Grow and Care for a Red Push Pistache Tree Hardpan, heavy clay, and salty soils are the riskiest for that rot.14UC IPM. How to Grow and Care for a Red Push Pistache Tree
A simple test shows what you have. Dig a hole about a foot deep and fill it with water. If water remains after a day, drainage is poor. Choose another spot or plant on a gentle raised mound, and where you can, break up any hard caliche layer below the hole.
Dig the planting hole twice as wide as the root ball and no deeper. Set the top of the root ball level with or slightly above the surrounding soil, then backfill with native soil rather than rich amendments. Build a low watering basin around the tree and spread mulch inside it, keeping the mulch off the trunk.
How to Water Red Push Pistache
Water a newly planted tree deeply once a week through its first growing season, because deep watering builds strong roots.15Simply Trees. Chinese Pistache: Stunning Fall Color and Expert Care Guide The small root ball dries out faster than the soil around it, and the tree depends on it entirely.
A deep watering means running a slow hose or drip until the soil is moist about 2 feet down. As the tree grows, water out at the edge of the canopy rather than only at the trunk. Let the top few inches dry before the next soaking.
Once established, it is highly drought tolerant, so it needs extra water only during extended dry periods.16Simply Trees. Chinese Pistache: Stunning Fall Color and Expert Care Guide Some guides suggest a moderate soak every 2 to 4 weeks in dry weather.17UA Campus Arboretum. Find Trees & Learn | UA Campus Arboretum Long irrigation runs or overwatering can trigger root and crown rot even in good soil.18UC IPM. How to Grow and Care for a Red Push Pistache Tree
The most common mistake is leaving the tree on a lawn sprinkler. Frequent shallow watering keeps the soil around the trunk wet and encourages shallow roots and rot. Put the tree on its own drip zone or a separate schedule. In heat waves, increase the depth of watering rather than how often you water.
To judge when it needs water again, push a long screwdriver or probe into the soil near the root zone a day or two after watering. It slides easily through moist soil and resists in dry soil, which shows how deep the water went. You can also dig a small hole a few inches deep at the canopy edge. If the soil feels cool and damp and clumps in your hand, wait.
Established trees need far less water in cool months, especially when leafless in winter, so shut off or lengthen any irrigation timer then. Rainfall counts toward the tree’s water, so skip a scheduled soak after a soaking rain. A tree in sand dries out sooner than one in clay, which holds water longer and is more prone to staying soggy.
Pruning a Young Tree for Good Shade
Young trees form branches somewhat randomly starting about 4 feet above ground.19Arid Zone Trees. How to Grow and Care for a Red Push Pistache Tree Pruning at this stage sets up the canopy structure.20Arid Zone Trees. How to Grow and Care for a Red Push Pistache Tree
In pistachio trees, several strong side shoots usually become the main structural branches.21UC Agriculture and Natural Resources. Pruning & Training Resources | California Pistachio Research Letting the smaller branches off those main limbs grow helps the limbs thicken.22UC Agriculture and Natural Resources. Pruning & Training Resources | California Pistachio Research Cutting back too many smaller branches at once can leave the tree spindly and easy to damage.23UC Agriculture and Natural Resources. Pruning & Training Resources | California Pistachio Research
Hold off on heavy pruning in the first season after planting, since the roots are still establishing and the leaves feed that growth. After that, prune in late winter while the tree is leafless. Pick three to five well-spaced main branches around the trunk. Remove crossing, rubbing, and inward-growing shoots, and never take more than about a quarter of the canopy in a year.
The goal is a single straight trunk with main branches spaced up and around it, rather than several branches competing from one point. Spread them at different heights so no single spot carries all the weight. Keep the lowest main branch high enough to walk under, but remember that early shoots lower on the trunk help it thicken, so remove them gradually as the trunk grows.
Don’t top the tree, which causes weak, crowded regrowth. Make clean cuts just outside the branch collar. As the tree matures it needs much less pruning, mostly removing dead wood, damaged limbs, or branches that rub.
Fertilizer and Yellow Leaves
Healthy dark green leaves mean no fertilizer is needed. Other symptoms point to a general shortage: pale leaves all over the tree and slow shoot growth suggest too little nitrogen,24Humico. Pistachio Tree Fertilizer & Fertilization: The Complete Guide and scorched leaf edges can signal low potassium.25Humico. Pistachio Tree Fertilizer & Fertilization: The Complete Guide
Yellowing that keeps the veins green points to something more specific. The most common nutrient problem in pistachios on chalky soils is iron chlorosis, a yellowing caused by iron shortage.26Agro Vivero del Mediterráneo. Fertilization and care of the pistachio tree It looks like green veins on a pale yellow leaf, forming a net pattern.27Agro Vivero del Mediterráneo. Fertilization and care of the pistachio tree
Very alkaline soil, above pH 8.2, keeps roots from absorbing iron, manganese, and zinc.28Agro Vivero del Mediterráneo. Fertilization and care of the pistachio tree Plain iron sulfate spread on such soil quickly becomes unusable.29Agro Vivero del Mediterráneo. Fertilization and care of the pistachio tree Use iron chelate instead, a form that stays available to roots.30Agro Vivero del Mediterráneo. Fertilization and care of the pistachio tree For soil above pH 7.5, choose the type labeled Fe-EDDHA.31Agro Vivero del Mediterráneo. Fertilization and care of the pistachio tree A soil pH test kit tells you whether alkalinity is the cause.
If you do feed the tree, use a light balanced product in spring only. Heavy feeding pushes lush, soft shoots that aphids prefer, so overfed trees often have more pest problems. In dry climates, fertilizer salts can also build up where there is little rain to wash them through, adding to the tree’s problem with salty soil.
Pests and Diseases to Watch For
The water mold behind root and crown rot lives in most soils.32UC IPM. How to Grow and Care for a Red Push Pistache Tree It is waterlogged soil, not the mold’s presence, that lets it attack.33UC IPM. How to Grow and Care for a Red Push Pistache Tree Good drainage and careful watering are the best prevention.
Signs include leaves that wilt or yellow even though the soil is wet, and dark, soft bark near the soil line. Cut back watering and pull mulch away from the trunk. If a large tree declines, call a certified arborist.
Verticillium wilt is a soil fungus that can affect pistachios, especially where cotton or tomatoes grew before.34Plant Pathology. Resistance of pistachio grafted on different Pistacia rootstocks against Verticillium wilt under field conditions The same two-species hybrid that Red Push comes from is used as a wilt-resistant rootstock in orchards.35UC IPM. How to Manage Pests in Gardens: Pistachio: Verticillium Wilt So Red Push likely carries some resistance, though it has not been rated as a landscape tree.
Aphids feeding on sap can be controlled with insecticidal soap or neem oil.36Stark Bro’s Nurseries & Orchards Co.. Pest & Disease Control for Pistachio Trees Spider mites cause fine speckling on leaves and respond to insecticidal soap.37Stark Bro’s Nurseries & Orchards Co.. Pest & Disease Control for Pistachio Trees Scale insects on bark can be pruned out and treated with horticultural oil.38Stark Bro’s Nurseries & Orchards Co.. Pest & Disease Control for Pistachio Trees
Summer leaf scorch on one side often reflects sun and dry wind. Wilt that kills one whole branch suggests a disease. Sticky leaves usually point to aphids or scale.
If you suspect a disease, look at the roots and the base of the trunk before assuming a leaf problem, since decline above ground often begins below it. Your local cooperative extension office can often help identify a problem from a photo or a sample of affected leaves or branches.
Fall Color, Fruit, and Seasonal Changes
New spring and summer growth has a reddish-orange tint.39Moon Valley Nurseries Blog. 7 Best Fast Growing Trees for Vibrant Fall Color Mature summer leaves then turn rich dark green,40Arid Zone Trees. How to Grow and Care for a Red Push Pistache Tree and the canopy turns vivid red in autumn.41Moon Valley Nurseries Blog. 7 Best Fast Growing Trees for Vibrant Fall Color The tree is deciduous, so leaves drop for winter.42Arid Zone Trees. How to Grow and Care for a Red Push Pistache Tree
In mild-winter areas the display may come later and be less vivid than in colder regions. It is strongest on a tree with full sun and good health, so a stressed or shaded tree often turns a duller shade.
Expect a single heavy leaf drop in late fall. The leaves make good mulch or compost, but keep gutters and pool areas in mind when you choose the spot.
Pistache trees come as separate male and female trees. Female trees can bear small red berries that birds enjoy but that litter paving.43Plant Me Green. What Everyone Should Know About the Chinese Pistache Tree Red Push is not grown for nuts, and male trees produce no fruit.44Plant Me Green. What Everyone Should Know About the Chinese Pistache Tree Any berries on your tree are not edible pistachios.