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ROC #343460

treeArizona NativePet FriendlyFragrantPollinator Plant

Sweet Acacia

Vachellia farnesiana

One of the most delightfully fragrant desert trees, filling the late-winter garden with intensely sweet golden blooms.

Hardy to about 15-18°F, a low- and mid-desert native that is frost-sensitive when young and hardy when mature.

AMWUA Notes

Low water; one of the most fragrant desert trees, blooming in late winter.

Care Guide

💧Watering

Deep-soak every 2-3 weeks in summer once established; blooms with returning warmth.

✂️Pruning

Wear gloves for the small thorns; train the multi-trunk form to a tree and thin the canopy, pruning after the late-winter bloom.

🌱Fertilizing

No fertilizer needed; a nitrogen-fixing native.

🛡️Pests

Essentially pest-free.

☀️Seasonal Notes

Intensely fragrant golden puffballs from late winter into spring (allergen pollen); semi-evergreen with pod litter.

Soil, Feeding & Propagation

🪨Soil

Adaptable, well-draining native soil; tolerates caliche, clay, rocky ground, and alkaline pH 7.5–8.5

💧Drainage

Needs well-drained soil.

🌱Nutrient Needs

None — thrives in lean desert soil without fertilizer.

🌰Propagation

Grown from scarified seed; establishes readily and self-sows

📐Spacing

15–20 ft

🌳Roots & Placement

Deep, non-aggressive roots; keep small thorns and pod litter off pools and walkways

Placement Tips

•About 20 ft as a fragrant specimen; site it upwind of patios and entries to carry the scent (though the pollen is an allergen).
•Small thorns and pod litter, so keep it off pools and walkways.
•Grow as a multi-trunk canopy tree in full sun.
•A native that supports bees, birds, and wildlife.

Features

Intensely sweet-scented golden flowersLate winter bloomsSupports bees, birds, and wildlifeSmall thorns

Best Uses

Fragrant gardenWildlife habitatPollinator garden

Ecological Value

Attracts

bees

Wildlife Value

birds

Companion Plants

tree

Native

Velvet Mesquite

Prosopis velutina

A quintessential Sonoran Desert shade tree with soft velvety foliage and deep roots that support a thriving wildlife community.

Very Low Waterfull sun

shrub

Texas Sage

Leucophyllum frutescens

A very drought-tolerant shrub with deep violet blooms after monsoon rains that attract hummingbirds.

Very Low Waterfull sunPool Safe

succulent

Red Yucca

Hesperaloe parviflora

One of the toughest and most rewarding desert plants, sending up arching coral-red flower spikes that hummingbirds adore.

Very Low Waterfull sunPool Safe

perennial

Native

Desert Marigold

Baileya multiradiata

A cheerful Southwestern native that blankets the landscape with sunny yellow daisies nearly every month of the year.

Very Low Waterfull sunPool Safe

Quick Stats

Water NeedsLow

Sun Exposurefull sun

Mature Size20 ft H × 20 ft W

Growth Ratemoderate

Maintenancemoderate

HardinessUSDA 9-11

FoliageEvergreen

Drainagewell-drained

Bloom SeasonLate Winter-Spring

Bloom ColorGolden Yellow

Litter Levelmoderate

Thornssmall

Native RegionSouthern US, South America

Design Styles

native habitatpollinator gardenlow maintenance

Include in Your Project

Love Sweet Acacia? Our landscape team sources from wholesale nurseries and can incorporate it into your design.

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Use this care guide to maintain your Sweet Acacia. Questions about your landscape? Reach out anytime.

Data from 2024 AMWUA “Landscape Plants for the Arizona Desert” guide.

Sweet Acacia — common questions

Answers for low-desert Phoenix conditions, drawn from this plant’s growing data.

How much water does Sweet Acacia need in Phoenix?

Sweet Acacia is a low-water tree once established. Deep-soak every 2-3 weeks in summer once established; blooms with returning warmth. Low water; one of the most fragrant desert trees, blooming in late winter.

How big does Sweet Acacia get?

Expect roughly 20 ft tall and 20 ft wide at maturity, with a moderate growth rate. Allow about 15–20 ft of spacing when planting. Deep, non-aggressive roots; keep small thorns and pod litter off pools and walkways.

Can you plant Sweet Acacia near a pool?

Not ideally. Sweet Acacia is not rated pool-friendly, so it is better placed away from the pool deck and skimmer. Litter is rated moderate.

Can Sweet Acacia handle Arizona heat and winter frost?

Sweet Acacia is hardy in USDA 9-11 and wants full sun. Hardy to about 15-18°F, a low- and mid-desert native that is frost-sensitive when young and hardy when mature. Intensely fragrant golden puffballs from late winter into spring (allergen pollen); semi-evergreen with pod litter.

Does Sweet Acacia have thorns?

Yes — Sweet Acacia has small thorns. Site it back from walkways, seating and pool decks where people brush past.

Is Sweet Acacia safe around pets?

Sweet Acacia is listed as pet-friendly in this guide. If your dog is a determined chewer, check any new plant with your vet before planting.

When does Sweet Acacia bloom in Arizona?

Sweet Acacia blooms in late winter-spring, with golden yellow flowers. The flowers are fragrant. The bloom draws bees.

How much maintenance does Sweet Acacia need?

Sweet Acacia is moderate-maintenance. Leaf, flower and pod litter is rated moderate. Wear gloves for the small thorns; train the multi-trunk form to a tree and thin the canopy, pruning after the late-winter bloom.

What kind of soil does Sweet Acacia need?

Adaptable, well-draining native soil; tolerates caliche, clay, rocky ground, and alkaline pH 7.5–8.5. It needs no supplemental feeding. No fertilizer needed; a nitrogen-fixing native.

Is Sweet Acacia native to Arizona?

Yes. Sweet Acacia is native to Arizona and to the Southern US, South America, so it is adapted to local rainfall, soil and heat.