By: Ilana Goldowitz Jimenez, Plant Scientist & Writer
The jacaranda tree, Jacaranda mimosifolia, produces attractive purple-blue flowers that form a lovely carpet when they fall to the ground. When these trees bloom abundantly, they are truly magnificent. Many gardeners plant jacarandas in hopes of seeing them in flower every year. However, jacarandas can be fickle trees, and making a jacaranda bloom can be a challenge. If you are wondering how to get a jacaranda to bloom, this article will tell you what you need to know.
Jacaranda Tree Not Blooming
If your jacaranda tree fails to bloom, check these factors and adjust accordingly:
Age: Depending on how they are grown, jacarandas may bloom for the first time between two and fourteen years after planting. Grafted trees tend to produce their first blooms on the earlier side of this range, while trees grown from seed can take much longer. If your tree is younger than this, patience may be all that is necessary.
Soil fertility: Jacarandas are believed to flower best when they are grown in poor soil. Excessive nitrogen may be the culprit when you have jacaranda flower problems. Nitrogen tends to promote growth of foliage, not flowers, and many plants, including jacaranda species, will fail to bloom or bloom poorly if they are given too much nitrogen fertilizer. Even fertilizer runoff from a nearby lawn can suppress flowering.
Sunlight and temperature: Ideal jacaranda flowering conditions include full sun and warm weather. Jacarandas won’t flower well if they receive fewer than six hours of sunlight each day. They also won’t bloom in excessively cool climates, although the trees might appear to be healthy.
Moisture: Jacarandas tend to produce more flowers during droughts, and they do better in sandy, well-draining soil. Be sure not to overwater your jacaranda.
Wind: Some gardeners believe that salty ocean breezes can harm a jacaranda and suppress flowering. Protecting your jacaranda or planting it in a spot where it won’t be exposed to wind could help it flower.
Despite all this, sometimes no cause can be found for a jacaranda that refuses to bloom. Some gardeners swear by more unusual strategies to coax these trees into bloom, such as hitting the trunk with a stick each year. If yours doesn’t seem to respond no matter what you do, don’t worry. It might decide, for reasons of its own, that next year is the right time to flower.
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Read more about Jacaranda
Jacaranda Tree: Comprehensive Guide
If you are considering adding some color to your landscape, look no further than the jacaranda tree. Filling the spring sky with a cloud of purple, it is a stunning sight to behold. It’s easy to see why this beauty is popular with gardeners in all tropical and subtropical areas.
The southern native is also called a fern tree. A close look at its long, feathery leaves explains why. Each spring, the soft-looking leaves are pushed aside by attractive, trumpet-shaped, long-lasting purple or pink flowers.
Once you see a purple hue emerging, you know that spring has arrived. And who doesn’t want to welcome a new growing season with all the fanfare it deserves?
If you’re considering adding a jacaranda to your landscape, read on for all the important details. Included below is everything from basic characteristics to how to promote healthy growth.
Quick Growing and Care Guide
- Scientific Name:Jacaranda mimosifolia
- Common Name (s): Jacaranda, Blue jacaranda, Green ebony tree, Black poui, Fern tree, Brazilian rosewood, Blue trumpet tree.
- Growing Zone (USA / UK Hardiness): 9(b)-11 / Does not do well in the UK, grow as a conservatory or greenhouse plant only. Can be grown in containers and put outdoors in the Summer in the UK/Europe when temperatures remain above 5°C (41°F) UK Hardiness zone H1c.
- Life Cycle / Plant Type:Tree
- Plant Height: 60 to 600 inches (5 to 50 feet 1.5 to 15 m)
- Plant Spread: 180 to 720 inches (15 to 60 feet 4.5 to 18 m)
- Blooms: Showy. Mid spring in UK (under glass seldom makes it to flowering) late spring to mid summer in the USA. May bloom at other times in hot areas.
- Flower Details: Purple-Blue (white cultivars also available) when mature. Fragrant. trumpets. Panicles. Last for about two months.
- Leaf Foliages: Bi-pinnate compound - Fern like, upto 20 inches (50 cm) long.
- Fruit Details: Round seed pod. Late summer.
- Best Light Conditions: Full sun (or under bright light if grown under glass). Performs best in hot humid areas.
- Suitable Soil Types:Well drained. Slightly sandy.
- Suitable Soil pH: Most soils, but prefers neutral or a slightly acidic soil.
- Soil Soil Moisture: Medium, but water deeply. Container grown plants should be allowed to dry completely between watering.
- Sowing, planting, and Propagation:Sow winged seeds that have been picked from trees once fruit has dried. Take cuttings in early summer (Semi-ripe), insert into pot containing cutting compost, keep in a greenhouse at 0–24°C (68–75°F).
- Care: Frost tender, copes better once established. prune young trees to one main trunk. trim off dead and broken branches, do not remove fresh growth. Low maintenance to look after, but a lot of work to clean up the ground below them following flower drop. Indoor plants susceptible to aphids and whitefly. Large surface roots. Affected by trunk scald. Repot container grown Jacaranda into a bigger pot every year using fresh compost. Provide container plants with a fortnightly liquid feed in the summer.
- Best used for: Flowering tree. Arched branches make it an ideal canopy plant. Bringing shade to the garden. Short term container plant.
- Family: Bignoniaceae.
- Closely Related Species: Jacaranda, Campsis, Dolichandra, Roseodendron, Spathodea, and Paragonia.
- Miscellaneous: Seed pods are attractive and are often dried and used for decorative purposes. Size means that they do not make good house plants.
- Further Reading and References used for this Jacaranda mimosifolia growing Guide:RHS Wikipedia
I hope that you enjoyed this guide on how to grow Jacaranda mimosifolia plants. You may also enjoy the following Gardener's HQ growing guides: How to grow Yucca and Eccremocarpus plants.
How often do you water a jacaranda tree?
Read everything about it here. Consequently, how do you care for a jacaranda tree?
Plant the tree in an open spot with sandy soil and full sun. Keep the soil moist deep down by soaking it with a hose for half an hour, but letting it dry out in between waterings. Care for a jacaranda tree almost always includes pruning.
Likewise, when should I fertilize my jacaranda tree? It thrives in any type of well-drained soil, even in nutritionally poor areas. The ample flower and leaf litter from the tree itself provides all the fertilizer the Jacaranda needs to grow. However, an extra dose of fertilizer added between May and July will increase the tree's growth rate and flowering ability.
In respect to this, what is the lifespan of a jacaranda tree?
The average lifespan of a jacaranda tree is 50 years old They can obviously grow a lot longer with some lasting well up to 200 years old. They reach maturity in about 20 years and are capable of re-growth if damaged from fresh falling seeds.
Why is my jacaranda tree losing its leaves?
Water Stress. Jacarandas stressed from too little water have yellowed, wilted prematurely dropping leaves. Those getting too much water have undersized leaves their small branches die back and their large ones may drop. Excessive watering also leaches essential minerals from the soil.