Allium rosenbachianum

Rosenbachianum Allium Bulbs

 
 
  • Showy Persian Onion, Allium rosenbachianum close up
  • Showy Persian Onion, Allium rosenbachianum
  • Allium rosenbachianum, Showy Persian Onion

Video

 

Allium rosenbachianum are early bloomers in the late-spring parade of globe Allium. Unique and effortlessly elegant, they stand tall at 32-38" with 4" diameter dark-violet globes. Each globe has over 50 starry florets with darker mid-veins and white stamens. They can extend your season of enjoyment by blooming about 2 weeks ahead of the other globe Alliums (Ornamental Onions). Plant with white Mount Everest Alliums for lovely contrasting blooms.

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Regular Price: $12.99

Sale $11.69

per bag of 3 You save: 10%
Zones 4 - 10
Advantages
Deer Resistant
Deer Resistant
Attract Butterflies
Attract Butterflies
Bee Friendly
Bee Friendly
Rabbit Resistant
Rabbit Resistant
Good for Containers
Good for Dried Flowers
Light Requirements
Full Sun
Full Sun
Morning Sun & Afternoon Shade
Morning Sun & Afternoon Shade
Annual Rainfall
Average
10 to 20", 20 to 30", 30 to 40", 40 to 50"
Bulb Spacing3 bulbs per sq. ft.
Bloom Time Late spring
Shipping Shipping begins in mid September, coldest zones first. Buy now and we'll ship your order at the ideal planting time for your region. More shipping info Learn More…
Size Bag of 3
SKU HFBL803

Details

Allium rosenbachianum (Showy Persian Onion) are essential flowers for all Allium-loving gardeners. The purple globes, like Spanish exclamation points, draw the eye and bring a smile. Allium rosenbachianum is a hard-to-find heritage variety in cultivation since around 1894. Blooming two weeks ahead of the other large Allium, they’ll extend your enjoyment of one of our most unique garden flowers. Plant these Allium in groups of three or so in a sun to part-shade location in enriched, well-drained soil. They work well planted in a perennial bed where the perennials will grow in and cover the allium’s aging foliage. Great cut flowers too, they are favorites of bees, butterflies and other pollinators. Easy-to grow, they are drought tolerant, deer and rabbit resistant and are nearly pest and disease free. There is something spectacular about Allium’s architectural and colorful presence in the flower garden.
SKU HFBL803
Common Name Rosenbachianum Allium Bulbs
Botanical Name Allium rosenbachianum
Zones 4, 5, 6, 7, 8, 9, 10
Ships As Bulb, Rhizome, Tuber
Light Requirements Full Sun, Morning Sun & Afternoon Shade
Flower Color Purple
Mature Height 20-24" tall
Bulb Size 14 cm
Bulb Spacing 3 bulbs per sq. ft.
Planting Depth Plant 6-8" deep
Bloom Time Late spring
Plant Type - Bulb Perennial
Planting Time Fall
Soil Type Sandy Soil, Average Soil, Drought/Dry Soil, Well-Drained Soil
Soil Moisture Average, Well Draining
Amount of Rain 10 to 20", 20 to 30", 30 to 40", 40 to 50"
Advantages Deer Resistant, Attract Butterflies, Bee Friendly, Rabbit Resistant, Good for Containers, Good for Dried Flowers
Prohibited In Idaho
Ideal Region Suitable Above 7000 ft, Hot Desert, Coastal California, Northeast, Southeast, Midwest, Southwest, West, Pacific Northwest
Ships to Hawaii, Alaska & Canada No

Planting Guides

Tips on Growing Fall Planted Flower Bulbs

When you receive your spring bulbs (tulips, daffodils, etc.) keep them in a dry, dark, cool place until ready to plant. They need air circulation so they will not collect moisture and rot. Planting times can vary from early October in the North to mid-to-late November in the southern regions. A good rule of thumb is to plant them about 6 weeks before the ground is frozen or after the first hard freeze. For more information and a planting depth illustration, see pages 14-16 of our Planting Guide.

Soil Preparation for Bulbs

A compost enriched, well-drained soil is best. Incorporate a good quality organic compost as needed. Yum Yum Mix® is recommended as an excellent source of nitrogen, phosphorus and potassium needed for strong plants and healthy roots. Mix a small amount into the bottom of the hole before planting your bulbs.

Many bulbs prefer full sun exposure. However, Muscaria, Allium, Galanthus, Hyacinthoides, Scilla and many Daffodils will tolerate partial shade and bloom well. Pink daffodils will hold their color longer if planted in dappled shade or morning sun/afternoon shade.

After planting, add a top dressing of compost or other organic material and water in thoroughly. If your winter is dry, water every three to four weeks throughout the winter and add more mulch if necessary.

Protect your Bulbs

Apply Chase Mole and Gopher Repellent to the surface of the ground to protect bulbs from these burrowing mammals. As bulbs sprout, use our Deer Off Repellent to prevent deer and rabbits from browsing your spring blooms.

After your Bulbs have Bloomed

Once your bulbs have bloomed, allow the bulb foliage to brown and fade naturally, since the leaves are feeding the bulb in the ground. Removal of foliage weakens the bulb and leads to fewer blooms the following year. Planting your bulbs amongst your perennials is one way to conceal the dying bulb foliage. The perennials begin to grow and fill out as the bulb foliage dies back. The perennials will then provide foliage and color in the garden from late spring through the summer and into fall. Regular fertilization with balanced organic or natural fertilizer and a re-application of mulch each fall will insure more and more beautiful spring bulb blooms for many years!


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.

Shipping

Plant & Bulb Shipping Buy now and we will ship your order at the ideal planting time for your region. Shipping begins Sept. 18. Amaryllis Bulbs will begin shipping mid-October 2017 and will continue until we sell out or through December 31, 2017.

Most plant and bulb orders 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.

Gardening Goods: All non-plant items 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, when possible, please call customer service at 800-925-9387.

More Shipping Info

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Q & A

Suggested Companion Plants:

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).

Find Your Planting Zone:

Enter your Zip Code to find your USDA Planting Zone

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