When Do Jacarandas Bloom?

Time Frame

• May is the most common month for jacarandas to bloom, according to the University of Florida IFAS Extension, although specific blooming times depend on location and soil conditions. Some jacarandas bloom as early as April, while others may not bloom until early summer. Late spring is usually the peak blooming period, notes the University of Arizona Cooperative Extension. Jacarandas in cooler climates may take longer to bloom.

Flower Description

• Showy, trumpet-shaped jacaranda flowers are deep blue or lavender. Flowers are moderately sized with clusters that are usually 2 inches in length and 1 1/2 inches long. When the flowers fall, they create a deep purple carpet under the tree. Although purple varieties are the most well-known, a white-flowered cultivar called "White Christmas" is also available, according to "The Complete Burke's Backyard."

Contributing Factors

• A variety of factors are required for successful jacaranda bloom cycles. Ironically, jacarandas may bloom better when they are grown in poor soils. They flower the most when planted in full sunlight, although they can tolerate light shade. Jacaranda trees bloom best after winters with several nighttime temperatures in the upper 30s Fahrenheit. Pruning changes the growth habits of jacaranda and decreases its aesthetic value.

Considerations

• To encourage optimal bloom cycles, water jacarandas frequently, particularly when the trees are becoming established and just after the blooming season. Plant jacarandas in well-drained, deep and fertile soil sites. When the trees are young, protect them from frost and heavy wind. Jacarandas grown from seed may be slower to grow than transplants. Jacarandas usually grow to a height of 25 to 45 feet, with a 45- to 60-foot spread, so allow enough room to grow when you plant your trees.