Details24-36" tall. Double Tuberose (Polianthes) is a double-flowered cultivar, also known as The Pearl, and has fragrant, creamy-white flowers on tall stems above clumps of grass-like foliage. Double Tuberose is a wonderful cut flower for long-lasting flower arrangements. Perfect for patio pots. Plant in well-drained soil in full sun in spring once soil temperatures reach 60 degrees Fahrenheit and all danger of frost has passed. Cold hardy in zones 7-10; grow as an annual in colder zones. Continue planting every two weeks through the end of July to extend blooming throughout summer.
|Common Name||Double Tuberose|
|Botanical Name||Polianthes The Pearl|
|Zones||7, 8, 9, 10|
|Ships As||Bulb, Rhizome, Tuber|
|Light Requirements||Full Sun|
|Mature Height||24-36" tall|
|Bulb Size||7/9 cm|
|Bulb Spacing||3 bulbs per sq. ft.|
|Planting Depth||Plant tubers horizontally (laying flat) 2" to 3" below the surface.|
|Bloom Time||Mid to late summer|
|Days to Bloom||90-120 days after planting|
|Planting Time||Spring / Summer|
|Soil Type||Sandy Soil, Average Soil, Compost Enriched Garden Loam Soil|
|Advantages||Easy to grow, Fragrant Flower / Foliage, Good for Cut Flowers|
|Additional Information||Can be grown as an annual in zones 3-6. Cold hardy in zones 7-10.|
|Ships to Hawaii, Alaska & Canada||No|
Summer Blooming Bulbs, including popular varieties such as gladiolus and dahlias, are planted in the spring and bloom in the summer. Most of these bulbs are tropical and require warm weather to be planted. There must not be any danger of frost and your ground temperature must have reached 55 degrees Fahrenheit before planting. Many of our summer blooming bulbs can be planted as perennials in zones 9-10 (zone 8 if mulched), but should be treated as annuals in cooler climates. You can lift them and store them in the fall, or bring patio pots inside before frost. See page 15 of our Planting Guide for a bulb depth planting illustration.
View more Planting Guides, or download our complete Planting Guide for tips on caring for your plants when you receive your order, as well as planting instructions for Perennials, Spring-Planted Bulbs, Fall-Planted Bulbs, Cacti & Succulents, Xeric Plants and more.
Plant Shipping: Buy now and we will ship your order at the ideal planting time for your region. Spring-Planted Perennial and Bulb orders will ship from February 27-June 30, warmest zones first. Most plant orders will arrive within 3-4 days, or less, of leaving our greenhouses. This prompt delivery is provided without additional express charges.
Grass Plugs Will ship at planting time in spring 2017, beginning in late February.
Wildflower Seed & Grass Seed Orders ship within 2-3 days.
Standard shipping costs are $4.99 and up, depending on the size of the order.
Make Fast Even Faster: For ‘Rush’ same week delivery, please call customer service at 800-925-9387.
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Comments about High Country Gardens Double Tuberose:
Lovely in patio pot near a door
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USDA Hardiness Planting Zones
To determine if a plant is sufficiently cold hardy, the USDA created numbered zones indicating winter low temperatures; the lower the zone number the colder the winter.
- If the coldest winter temperature expected in your area is -15°F (zone 5) then any plants rated zones 3-5 will survive the winter temperatures in your area.
- If you live in very warm winter areas (zones 9-11) plants with zones 3-4 ratings are not recommended. The lack of freezing winter temperatures do not provide a time for winter dormancy (rest).
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