Photo: Shakti450 / CC BY-SA 4.0 / Wikimedia Commons

Jatropha

Jatropha integerrima

A sleek, red-flowering tropical shrub that blooms nearly all year in Dubai's heat; the seeds and sap are poisonous, and it has no tolerance of salt in the soil.

Mature size2–4.5 m tall, 1.5–4.5 m spreadGrowthModerateSunFull sunWaterModerate

Heat: 5 of 5

Salt: 2 of 5

Drought: 3 of 5

Shade: 2 of 5

Ease of care: 4 of 5

Use in a design Get it looked after

All parts of this plant are poisonous if eaten, especially the smooth, speckled seeds, and the sap irritates skin. University of Florida advises keeping it out of reach of children. Plant it away from play areas, remove seed capsules before they split, wear gloves when pruning, and keep pets from chewing it.

Season

Through the Dubai year

How Jatropha behaves through Dubai's seasons, month by month.

JJan

FFeb

MMar

AApr

MMay

JJun

JJul

AAug

SSep

OOct

NNov

DDec

Avg high °C

24°

26°

29°

34°

38°

40°

42°

40°

36°

31°

27°

Best planting window

Oct – Dec

Jan – Mar

Red or pink flowers almost year-round

Jan – Dec

Light shaping and tip pruning

Balanced slow-release feed

Check for mites and scale

May – Sep

Best planting window: Oct–Mar
Plant in the cool season so roots establish before summer.
Red or pink flowers almost year-round: Jan–Dec
University of Florida reports year-round flowering in warm climates; Dubai's cooler winter may slow it slightly.
Light shaping and tip pruning: Feb–Mar
Prune lightly for structure; heavy cutting damages the plant. Wear gloves, as the sap irritates skin.
Balanced slow-release feed: Mar, Sep
Check for mites and scale: May–Sep
University of Florida lists mites, scale and leaf miner as occasional problems.

Jatropha holds its glossy foliage through the year and keeps producing small red flowers in upright clusters in every month, so its look changes in density rather than season. Flowering is steadiest through the warm months, when growth is fastest, and slows a little in the cool season. A light shaping in late winter keeps the branching open and the flowers at eye level. Seed capsules form after flowering and, if left, split and scatter the toxic seeds, so they are best removed before they ripen.

Meet the plant

Meet the Jatropha

Meet jatropha, known in the trade as peregrina, a plant that turns a corner of the garden into a scatter of small red stars. Slender stems carry glossy leaves with an odd, fiddle-shaped outline, and above them, on upright stalks, sit tight clusters of bright red or pink flowers, each about an inch across. The flowers keep coming nearly all year, so the plant always has a spark of colour in it, even in the long white light of a Dubai summer.

Its habit is sparse and upright rather than bushy, and that gives it a clean, sculptural outline that suits a trained standard or a large container better than a hedge. Left unpruned it grows leggy; pruned too hard it suffers, so it rewards a light, steady hand with the shears.

The honest caveat is toxicity. Every part is poisonous, and the seeds are the part to respect. Plant it where it can be admired from a distance rather than touched, and its brightness is a pleasure instead of a worry.

Jatropha integerrima, sold as peregrina, spicy jatropha or firecracker plant, is a slender, multi-trunked tropical evergreen shrub or small tree that University of Florida describes as native to Cuba. It grows to about 10 to 15 feet (3 to 4.5 m) with an equal spread, carrying 3 to 6 inch leaves that vary from oblong to fiddle-shaped to lobed, and bright red or pink flowers about an inch across, produced year-round in upright clusters. In Dubai it is grown as a specimen shrub, a trained standard or a big container plant.

It likes full sun, though it tolerates part shade, and adapts to clay, sand and loam, whether acidic or alkaline, provided drainage is good. University of Florida rates its drought tolerance as moderate, and its salt tolerance as moderate for salt spray but none in the soil, a distinction that matters in Dubai gardens irrigated from borehole or saline sources. Abu Dhabi Municipality's 2012 plant index lists Jatropha integerrima among drought-tolerant shrubs, so it copes with dry spells once established. Pests are few: mites, scale and a superficial leaf miner are the occasional visitors.

Its form needs a light hand. University of Florida says pruning is needed for strong structure, while a Hawaiian plant guide notes the plant gets leggy but can be damaged by too much pruning and does not work as a formal hedge. The seeds sit in a six-lobed capsule, three to a capsule, and University of Florida flags them as toxic and to be kept away from children, so the plant is best placed with that in mind from the start.

Design

Where to use it

Specimen shrubTrained standardLarge containerTropical border accent

Place jatropha where its red flower clusters can be seen from a seat or doorway, but out of the way of children's play. It suits a prominent corner of a tropical or luxury scheme as a single-stem standard, or a large container on a terrace where it can be moved if needs change. Give it full sun and clean irrigation water, and avoid planting it in a tight hedge, where its sparse, upright form and sensitivity to heavy pruning work against it.

Frangipani

Frangipani's bare, sculptural branches and fragrant flowers sit well beside jatropha's slender stems, and both thrive in full sun with moderate water.

Bird of paradise

Bird-of-paradise's bold, paddle-shaped leaves and orange flowers give broad texture against jatropha's finer, fiddle-shaped foliage and red blooms.

Ixora

Low ixora clusters at the base of a jatropha shrub hide its sparse lower stems and add a second layer of red or orange.

Care guide

How to grow it in Dubai

Watering: Summer: Moderate: a deep, regular watering through the heat, allowing the top of the soil to dry slightly between irrigations.
Winter: Reduce frequency as growth slows.
Establishment: Water regularly until the roots are established, with good drainage so the root ball never sits wet.
Soil: Well-drained soil; University of Florida lists tolerance of clay, sand, loam, acidic and alkaline conditions. It has no tolerance of salt in the soil, so use clean irrigation water.
Feeding: A balanced slow-release feed in spring and early autumn supports steady flowering; avoid over-feeding, which encourages soft, leggy growth.
Pruning: Prune lightly in late winter for strong structure and to promote branching; heavy pruning damages the plant. Wear gloves, since the sap irritates skin, and remove seed capsules before they split.
Planting: Plant October to March in full sun, away from play areas and from salty or saline irrigation lines.
Pests: Spider mitesScale insectsSuperficial leaf miner (occasional)

Avoid these

Common mistakes

Planting it beside a play area or a pet run. The seeds are the most toxic part, and the capsules split and scatter them once ripe.
Pruning it hard to force a bushy shape. It is a sparse, upright plant that is damaged by heavy cutting, so shape it lightly and often instead.
Using it as a formal hedge. Its open, upright habit does not fill in like a clipped hedge, and tight clipping will thin it further.
Irrigating with borehole or other saline water. University of Florida rates its soil salt tolerance as none, so leaf scorch and decline follow.
Pruning without gloves. The milky sap irritates skin, and handling cuttings is the usual way that gardeners find out.

Extra notes

Good to know

Jatropha integerrima, the ornamental peregrina covered here, is a different species from Jatropha curcas, the physic nut grown for biofuel, and from the bottle-trunked Jatropha podagrica sold as a pot plant. Seeds and sap of the genus are generally treated with caution.
University of Florida describes the plant as bothered only occasionally by mites, scale and a superficial leaf miner, and as free of root problems, which makes it a gentle neighbour to paving.
Its salt tolerance is split: moderate against salt spray in the air, but none in the soil. For a Dubai garden, that makes irrigation water quality more important than coastal exposure.
University of Florida's non-native plant assessment finds it not a problem species in Florida's natural areas.

Toxicity: All parts are poisonous to people and animals if eaten, especially the smooth, speckled seeds, which University of Florida flags as toxic and to be kept away from children. The sap also irritates skin; wear gloves when pruning.

Pros

Bright red or pink flowers in upright clusters, produced nearly all year
Glossy, fiddle-shaped leaves give a distinctive, sculptural texture
Thrives in full sun and heat, with few serious pest problems
Can be trained as a single-stem standard or grown in a large container
Roots are not reported to cause trouble near paving or structures

Cons

All parts are poisonous, especially the seeds; keep away from children and pets
Sap irritates the skin, so wear gloves when pruning
Grows leggy without pruning, yet heavy pruning damages it
No tolerance of salt in the soil, so saline irrigation water is a problem
Does not work as a formal hedge

FAQ

Common questions

Are jatropha seeds poisonous?

Yes. University of Florida describes the seeds as toxic and says the plant should be kept out of the reach of children. Other sources say all parts of Jatropha integerrima are poisonous, with irritant sap, so treat the whole plant with caution around children and pets.

Why is my jatropha tall and leggy?

That is its natural habit. Light, regular pruning in late winter promotes branching, but heavy pruning can damage it. Starting early with tip pruning, and growing it in full sun, gives a better shape than a hard cut later.

Can I use jatropha as a hedge?

Not a formal one. A Hawaiian plant guide notes it does not work as a clipped hedge, and its sparse, upright form is best as a specimen, a standard or a loose group.

Does jatropha flower all year in Dubai?

University of Florida reports year-round flowering for the species in warm climates. In Dubai it flowers through most of the year, with the steadiest display in the warmer months and some slowing in the cool season.

Can jatropha be watered with borehole water?

Not safely. University of Florida lists its soil salt tolerance as none, although it tolerates some salt spray in the air. Clean irrigation water suits it far better, and a saline source calls for a more tolerant plant such as Sea Jasmine.

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