Rosanne Black Pearl is the darkest purple lisianthus you can grow, a striking F1 hybrid that brings theatrical elegance to any arrangement. This compact variety reaches maturity in 140-150 days and thrives in hardiness zones 8-11, making it accessible to gardeners across warm climates. With its conventional seed and deep color, it's a serious contender for cut flower enthusiasts who want something that commands attention the moment it opens.
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8-11
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Moderate
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The deepest purple in the lisianthus lineup, Rosanne Black Pearl delivers that rare combination of dramatic color and compact growth. At just 4 inches of spacing, you can pack these beauties into a small garden plot or greenhouse bench, yet each stem produces cut flowers that rival florist-quality blooms. The 140-150 day timeline gives you plenty of advance planning, and for those willing to master lisianthus from seed, this hybrid rewards careful attention with flowers that last.
Rosanne Black Pearl is bred specifically as a cut flower. The deep purple blooms make exceptional statements in fresh arrangements, where their color depth and elegant form create striking focal points or rich background layers. Florists and home gardeners who arrange their own flowers find the extended vase life particularly rewarding.
No timeline data available yet for this variety.
Sow seed into a 288-cell or deeper seedling container 12-13 weeks before your planned transplant date. Light is required for germination; cover seed with a thin layer of fine vermiculite to suppress algae growth on the seedbed surface. Greenhouse production is highly recommended for growing lisianthus, as the seedlings are quite sensitive to environmental fluctuations.
Transplant seedlings outdoors once they have developed sufficiently and your area is reliably within zones 8-11. Harden off plants gradually before moving them to their final location. Space plants 4 inches apart.
Cut stems when one or more flowers on the stem are open. This timing ensures you capture the blooms at their prime for the longest vase life in arrangements.
With its compact growth habit, Rosanne Black Pearl requires minimal pruning. Remove spent flowers to encourage continued blooming and maintain plant shape as needed throughout the growing season.
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