Tuberose, or polyanthus lily as they are known botanically, are summer blooming tender tropical bulbs. They are prized for their heady sweet scent, tall growth form and multiple blooms that open in a cascade over time. Tuberose bulbs are planted en masse in garden beds and borders, and are widely grown in cutting gardens and for the commercial cut flower industry. Hardy in USDA Zones 8 through 11, tuberose bulbs must be grown as annuals and overwintered indoors in cooler climes.
Plant your tuberose bulbs 4-inches deep in nutrient-rich moist soil. Select a planting location that affords a full sun or afternoon sun exposure.
Water tuberose bulbs every 5 to 10 days depending on your climate. Keep the soil evenly and lightly moist at all times never allowing the soil to dry out. Feed twice per year with a good quality granular bulb food according to label directions. Make the first application in the spring and the second in the late summer to help recharge the bulb.
Dig tuberose bulbs in the fall where winter ground temperatures hit 50 degrees F or below. Store the bulbs in a plastic container or bag filled with clean sand in a location with ambient temperatures between 70 and 75 degrees F. Plant out in the spring well after the last frost has passed and the ground soil has warmed.