Jacaranda mimosifolia
Blue flamboyant, jacaranda, oyster tree: when it blooms, this tree first loses all its leaves, keeping only its clusters of blue-violet flowers — a colorful cloud suspended in midair. In Pretoria and Buenos Aires, jacaranda blooming is an annual event that transforms entire avenues into mauve tunnels.
Characteristics:
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Spectacular flowering: large clusters of blue-violet flowers in spring and summer, often before the leaves appear.
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Fern-like foliage: finely divided bipinnate leaves, which explain its epithet mimosifolia.
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Large tree: 10 to 15 meters in warm climates, with a spreading, graceful habit.
Precautions:
- A subtropical tree, it cannot withstand prolonged frost: in mainland France, it is grown in a pot and overwintered frost-free, except on the French Riviera, where it can survive outdoors in a sheltered location.
- Flowering in a pot is rare and requires several years of patience: in our climates, it is primarily grown for its ornamental foliage.
Sowing advice:
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Position: full sun, in an area sheltered from strong winds that can damage its delicate foliage.
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Soil: light, sandy, and well drained. It tolerates poor soils but absolutely cannot tolerate stagnant water around its roots. In a pot, a potting soil and sand mix works well.
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Method: no cold stratification — this subtropical species requires warmth. Soak the winged seeds for 24 hours in lukewarm water, then sow them on the surface or barely covered, in a substrate kept moist at 22–25 °C. Germination is generally quick and reliable. See how to sow your seeds.
Planting advice:
- Plant in a deep pot to be brought indoors as soon as temperatures begin to drop, in a bright room above 10 °C. Plant outdoors only in a sheltered Mediterranean climate.
- Its fine foliage and rapidly thickening trunk make it an excellent bonsai subject — see our guide creating a bonsai from a seed.
Care advice:
- Water regularly during the growing season, without excess, and reduce watering considerably in winter during dormancy.
Benefits for biodiversity:
- In its native range, its nectar-rich tubular flowers are pollinated by bees and hummingbirds.
- Its light foliage allows sunlight through and makes it possible to grow plants at its base, unlike trees with dense canopies.
Uses:
- Ornamental tree for large gardens and avenues in warm climates; grown in pots or as a bonsai in our latitudes. Its dried flowers are suitable for floral arrangements.
Symbolism:
In South America and southern Africa, jacaranda blooming heralds the end of the academic year: students say that a flower falling on your head brings good luck in exams. It symbolizes renewal and wisdom.
Harvesting your own seeds:
Its fruits are flat, round, highly decorative woody capsules that split into two valves when mature, releasing winged, papery seeds. Harvest the dry capsules from the tree. See how to store your seeds.
Commitment to Quality: at SemiSauvage - Permaculture, we grow and select our seeds with respect for all living things as our guiding principle. Based near the Auvergne Volcanoes, we choose reproducible, non-hybrid varieties, test them for germination rates, and carefully sort and package them without any chemical treatment. Our belief: to give gardeners back the ability to resow, year after year, seeds that truly belong to them.
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