Intermediate
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Caesalpinia gilliesii (Crimson threadflower)
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2 hours care
per year
per year
3m
Max height
Max height
2.5m
Max spread
Max spread
10-20 years
To maturity
To maturity
Low
Toxicity
Toxicity
Plant details
Botanical name
Caesalpinia gilliesii
Other names
Crimson threadflower, Poinciana, Bird of paradise, Poinciana gilliesii, Bird of paradise shrub
Genus
Caesalpinia Caesalpinia
Species
C. gilliesii - C. gilliesii is a tender, erect to spreading, evergreen shrub or small tree bearing pinnate leaves divided into numerous oblong, mid- to dark green leaflets and, in summer, erect racemes of bowl-shaped, yellow flowers with long, protruding, scarlet stamens.
Caesalpinia gilliesii is: Evergreen
Habit
Spreading, Erect
Toxicity
Flowers and seeds are toxic if ingested.
Awards
RHS AGM (Award of Garden Merit)
Flower
Yellow in Spring; Yellow in Summer; Yellow in Autumn
Foliage
Green in All seasons
How to care
Watch out for
Specific pests
Glasshouse red spider mite , Glasshouse whitefly , Mealybugs Glasshouse red spider mite , Glasshouse whitefly , Mealybugs
Diseases
Generally disease-free.
General care
Pruning
Pruning group 8. Pruning group 13 if wall-trained. If grown under glass, may need to be cut back to fit available space after flowering.
Propagation
Sow seed in spring at 13-18C. Prior to sowing, soak seed in warm water for 24 hours.
Propagation methods
Seed, Softwood cuttings
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Where to grow
Caesalpinia gilliesii (Crimson threadflower) will reach a height of 3m and a spread of 2.5m after 10-20 years.
Suggested uses
Wallside and trellises, Indoor, Greenhouse, Flower Arranging, Drought Tolerant, Containers, Conservatory, City, Beds and borders, Architectural
Cultivation
Under glass, grow in loam-based compost in full light. Water moderately & feed monthly. May need restrictive pruning after first flush of flowers. Outdoors in frost-free areas, grow in fertile, moist but well-drained soil in full sun. Drought tolerant once established.
Soil type
Chalky, Clay, Loamy, Sandy (will tolerate most soil types)
Soil drainage
Moist but well-drained
Soil pH
Acid, Alkaline, Neutral
Light
Full Sun
Aspect
South, West
Exposure
Sheltered
UK hardiness Note: We are working to update our ratings. Thanks for your patience.
Indoor heated (H1), Tender in frost (H3)
Companion plants
We do not currently have companion plants added for this plant.
Botanical name
Caesalpinia gilliesii
Other names
Crimson threadflower, Poinciana, Bird of paradise, Poinciana gilliesii, Bird of paradise shrub
Genus
Caesalpinia Caesalpinia
Species
C. gilliesii - C. gilliesii is a tender, erect to spreading, evergreen shrub or small tree bearing pinnate leaves divided into numerous oblong, mid- to dark green leaflets and, in summer, erect racemes of bowl-shaped, yellow flowers with long, protruding, scarlet stamens.
Native to
South America
Foliage
Evergreen
Habit
Spreading, Erect
Toxicity
Flowers and seeds are toxic if ingested.
Awards
RHS AGM (Award of Garden Merit)
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Colour
Flower
Yellow in Spring; Yellow in Summer; Yellow in Autumn
Foliage
Green in All seasons
How to care
Watch out for
Specific pests
Glasshouse red spider mite , Glasshouse whitefly , Mealybugs
Diseases
Generally disease-free.
General care
Pruning
Pruning group 8. Pruning group 13 if wall-trained. If grown under glass, may need to be cut back to fit available space after flowering.
Propagation
Sow seed in spring at 13-18C. Prior to sowing, soak seed in warm water for 24 hours.
Propagation methods
Seed, Softwood cuttings
Monthly care advice
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Where to grow
Caesalpinia gilliesii (Crimson threadflower) will reach a height of 3m and a spread of 2.5m after 10-20 years.
Suggested uses
Wallside and trellises, Indoor, Greenhouse, Flower Arranging, Drought Tolerant, Containers, Conservatory, City, Beds and borders, Architectural
Cultivation
Under glass, grow in loam-based compost in full light. Water moderately & feed monthly. May need restrictive pruning after first flush of flowers. Outdoors in frost-free areas, grow in fertile, moist but well-drained soil in full sun. Drought tolerant once established.
Soil type
Chalky, Clay, Loamy, Sandy (will tolerate most soil types)
Soil drainage
Moist but well-drained
Soil pH
Acid, Alkaline, Neutral
Light
Full Sun
Aspect
South, West
Exposure
Sheltered
UK hardiness Note: We are working to update our ratings. Thanks for your patience.
Indoor heated (H1), Tender in frost (H3)
USDA zones
Zone 10, Zone 9, Zone 8
In order to add a note on this plant, please add this plant to your plant lists.
| This plant likes... | Garden match | |
| Soil types: | Chalky, Clay, Loamy, Sandy (will tolerate most soil types) | Tell us... |
| Soil drainage: | Moist but well-drained | Tell us... |
| Soil pH: | Acid, Alkaline, Neutral | Tell us... |
| Light: | Full Sun | Tell us... |
| Aspect: | South, West | Tell us... |
| Exposure: | Sheltered | Tell us... |
| Hardiness: | Indoor heated (H1), Tender in frost (H3) | Tell us... |
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