North America Non-native Plant

Bird-of-paradise Shrub

Botanical name: Caesalpinia gilliesii

USDA symbol: CAGI

Life cycle: perennial

Habit: vine

Native status: Non-native, reproduces and persists in the wild in the lower 48 states âš˜ Non-native, reproduces and persists in the wild in Puerto Rico  

Synonyms: Poinciana gilliesii Wall. ex Hook. (POGI2)   

Bird-of-Paradise Shrub: A Stunning Desert Beauty for Water-Wise Gardens Looking for a show-stopping shrub that can handle blazing heat and minimal water? The bird-of-paradise shrub might just be your new garden superstar. With its exotic orange and red blooms topped by dramatic crimson stamens, this drought-tolerant beauty brings a touch ...

Bird-of-Paradise Shrub: A Stunning Desert Beauty for Water-Wise Gardens

Looking for a show-stopping shrub that can handle blazing heat and minimal water? The bird-of-paradise shrub might just be your new garden superstar. With its exotic orange and red blooms topped by dramatic crimson stamens, this drought-tolerant beauty brings a touch of tropical flair to even the most arid landscapes.

What Exactly Is Bird-of-Paradise Shrub?

Botanically known as Caesalpinia gilliesii, the bird-of-paradise shrub is a perennial flowering shrub that typically grows as a multi-stemmed woody plant. Don’t let the common name fool you – this isn’t the same as the famous orange bird-of-paradise flower you might know. This shrub version has its own unique charm with delicate, feathery foliage and flowers that look like tiny fireworks exploding in shades of orange and red.

Originally from Argentina and Uruguay, this non-native species has found a comfortable home in the southwestern United States, where it reproduces naturally and has become established in the wild.

Where Does It Grow?

You’ll find bird-of-paradise shrub thriving across the American Southwest and beyond. It’s currently established in Arizona, California, Georgia, Nevada, New Mexico, Oklahoma, Texas, Utah, and Puerto Rico. These locations give you a good idea of the warm, dry conditions this plant absolutely loves.

Size and Growth Habits

This is definitely a slow and steady wins the race kind of plant. With a slow growth rate, your bird-of-paradise shrub will reach about 20 feet tall after 20 years, potentially maxing out around 35 feet at full maturity. It typically grows with a single main stem in an upright, erect form.

The dark green foliage has a coarse texture and remains porous year-round, creating an airy, light appearance. In fall, the plant puts on a nice show with conspicuous autumn color.

The Flower Show

Here’s where things get exciting! The bird-of-paradise shrub blooms in early spring with white flowers accented by those stunning orange and red details. The flowers are definitely the main attraction – they’re large, showy, and impossible to ignore. After blooming, the plant produces black seeds that are quite conspicuous and add their own ornamental value.

Perfect Growing Conditions

This shrub is practically made for challenging conditions. Here’s what it loves:

  • Soil: Coarse or medium-textured soils work best (avoid heavy clay)
  • pH: Alkaline conditions between 7.0-8.5
  • Water: Extremely drought tolerant once established
  • Sun: Full sun only – shade intolerant
  • Climate: Needs at least 320 frost-free days per year
  • Hardiness: USDA zones 8-11 (can handle temperatures down to 27°F)

Garden Design Ideas

Bird-of-paradise shrub shines in water-wise landscapes where its drought tolerance and striking blooms can take center stage. It’s perfect for:

  • Xeriscape gardens
  • Desert and Mediterranean-style landscapes
  • Accent plantings where you want a dramatic focal point
  • Low-maintenance garden areas

Wildlife and Pollinator Benefits

Those showy flowers aren’t just for human eyes – they’re magnets for pollinators! The bird-of-paradise shrub attracts hummingbirds, bees, and butterflies with its nectar-rich blooms, making it a valuable addition to pollinator-friendly gardens.

Planting and Care Tips

The good news? This plant is surprisingly easy to grow once you understand its needs:

  • Planting: Available through specialty nurseries, can be grown from seed, cuttings, or bare root plants
  • Spacing: Allow 700-2,700 plants per acre depending on your design goals
  • Watering: Minimal water needs – perfect for low-water landscapes
  • Fertilizing: Low fertility requirements (it actually prefers lean soils)
  • Pruning: Generally low maintenance, though it doesn’t resprout if cut back hard

Should You Plant It?

Bird-of-paradise shrub can be a fantastic choice for the right garden situation. It’s particularly valuable in areas where water conservation is important and where you want maximum visual impact with minimal care. However, since it’s not native to North America, you might also consider native alternatives that provide similar drought tolerance and wildlife benefits.

Some native alternatives to consider include desert willow (Chilopsis linearis), red yucca (Hesperaloe parviflora), or native salvias, depending on your specific location and design goals.

If you do choose to plant bird-of-paradise shrub, you’ll be rewarded with years of stunning blooms and a truly unique addition to your drought-tolerant garden palette. Just make sure you can provide that crucial full sun and well-draining soil – this desert beauty won’t compromise on its basic needs!

How

Bird-of-paradise Shrub

Grows

Growing season

Summer

Lifespan

Long

Growth form & shape

Single Stem and Erect

Growth rate

Slow

Height at 20 years

20

Maximum height

35.0

Foliage color

Dark Green

Summer foliage density

Porous

Winter foliage density

Porous

Foliage retention

Yes

Flowering

Yes

Flower color

White

Fruit/seeds

Yes

Fruit/seed color

Black

Allelopath

No

Nitrogen fixing

Low

Toxic

None

C:N Ratio

High

Fire Resistant

No

Foliage Texture

Coarse

Low-growing Grass

No

Resproutability

No

Coppice Ability

No

Bloat

None

Bird-of-paradise Shrub

Growing Conditions

Adapted to Coarse Soil

Yes

Adapted to Medium Soil

Yes

Adapted to Fine Soil

No

Anaerobic tolerance

None

CaCO₃ tolerance

High

Cold Stratification

No

Drought tolerance

High

Nutrient requirement

Low

Fire tolerance

None

Frost-free days minimum

320

Hedge tolerance

None

Moisture requirement

Low

pH range

7.0 to 8.5

Plants per acre

700 to 2700

Precipitation range (in)

2 to 10

Min root depth (in)

12

Salt tolerance

Low

Shade tolerance

Intolerant

Min temperature (F)

27

Cultivating

Bird-of-paradise Shrub

Flowering season

Early Spring

Commercial availability

Contracting Only

Fruit/seed abundance

High

Fruit/seed season

Summer to Summer

Fruit/seed persistence

No

Propagated by bare root

Yes

Propagated by bulb

No

Propagated by container

Yes

Propagated by corm

No

Propagated by cuttings

Yes

Propagated by seed

Yes

Propagated by sod

No

Propagated by sprigs

No

Propagated by tubers

No

Seed per pound

60000

Seed spread rate

Moderate

Seedling vigor

High

Small grain

No

Vegetative spread rate

Slow

Bird-of-paradise Shrub

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Rosidae

Order

Fabales

Family

Fabaceae Lindl. - Pea family

Genus

Caesalpinia L. - nicker

Species

Caesalpinia gilliesii (Wall. ex Hook.) Wall. ex D. Dietr. - bird-of-paradise shrub

Plant data source: USDA, NRCS 2025. The PLANTS Database. https://plants.usda.gov,. 2/25/2025. National Plant Data Team, Greensboro, NC USA