Native to Mexico, tuberose (Polianthes tuberosa) is summer bloomer with sweetly scented white blooms that grow atop tall, spiky stems surrounded by sword-shaped foliage. Although tuberose is a warm-climate flower, it can be successfully grown in cold climates as long as the bulbs are planted in a sunny spot. Dig the bulbs in autumn and store them safely for the winter.
Plant tuberose bulbs in spring after the days have warmed and any danger of frost has passed. Locate tuberose in a sunny spot with well-drained soil, as the plant won't do well with wet feet.
Water the area thoroughly. Continue to water the tuberose regularly throughout spring and summer. The soil should be moist but never soggy.
Fertilize tuberose every three to four weeks during spring and summer, using a balanced liquid or granular fertilizer such as 8-8-8. Always apply fertilizer according to the recommendations on the package.
Allow the foliage to remain on the tuberose after the blooms wilt in early autumn. The foliage absorbs energy from the sun, which feeds the bulbs for the next year's growth. The foliage can be safely removed when it wilts and turns yellow.
Dig the tuberose bulbs carefully with a garden fork or a spade. Lay the bulbs in a shady spot to dry for 7 to 10 days.
Place the tuberose bulbs in a cardboard box filled with peat moss or sawdust. Store the box in a cool, frost-free room. The ideal temperature is between 50 and 55 degrees F.
Check the tuberose bulbs periodically throughout the winter. Discard any bulbs that are turning soft or rotting. Replant the bulbs in spring.