Bush allamanda is a tropical evergreen shrub from Brazil that brings bold summer color to warm gardens and containers. Its clusters of bright yellow, trumpet-shaped flowers feature distinctive orange-red throat stripes and bloom prolifically in heat and humidity. Hardy in zones 10-11, it typically grows 4-5 feet tall and wide, though you can keep it more compact with pruning. In cooler climates, gardeners grow it as an annual or in containers that move indoors before frost. Beyond flowers, the rounded, prickly burlike fruits add ornamental interest if you skip deadheading.
Full Sun
Moderate
10-11
48in H x 48in W
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High
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Brilliant yellow trumpet flowers with those striking orange-red throat markings appear in clusters that intensify in full sun and heat. The shrub thrives in hot, humid climates where nighttime temperatures stay above 60 degrees F, practically glowing during peak summer bloom. Deadheading spent flowers will trigger wave after wave of blooms, though leaving some flowers to fruit gives you secondary ornamental appeal with those distinctive prickly seedpods. Its evergreen, leathery foliage stays attractive year-round in tropical zones, and container culture makes it accessible even to gardeners in colder regions.
Bush allamanda serves primarily as an ornamental shrub prized for its showy flowers and foliage. In tropical and subtropical gardens (zones 10-11), it anchors mixed borders and foundation plantings where its bright blooms and evergreen structure provide season-long interest. In cooler regions, it functions as a stunning annual or container specimen that brings tropical energy to patios, decks, and greenhouse collections. The combination of flowers and ornamental fruits makes it valuable where gardeners want multiple layers of visual appeal.
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Move container plants outdoors after all frost danger has passed and nighttime temperatures consistently remain above 60 degrees F. Harden off plants gradually over a week before transplanting to garden soil or larger containers in full sun. Space plants 3-4 feet apart to allow for their mature width of 36-48 inches.
Prune to shape the shrub and maintain your desired size, particularly before the growing season begins. Prompt removal of spent flowers strongly encourages more prolific blooming throughout the season. If you prefer ornamental fruit display over maximum flowers, allow some blooms to develop into those distinctive prickly burlike seedpods.
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“Bush allamanda is native to Brazil, where it evolved as a tropical shrub thriving in warm, humid conditions. The species Allamanda schottii represents a distinct member of the Apocynaceae family, distinct from its larger climbing relative Allamanda cathartica. Its journey to cultivation outside the tropics reflects how gardeners and horticulturists have adapted tropical plants for wider geographic reach, particularly through container growing methods that allow even temperate-zone gardeners to enjoy its bold flowers seasonally.”