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A showy display of bright yellow flower clusters in late summer to early fall distinguishes Giant Sulphur Buckwheat (Eriogonum umbellatum) from all others. This durable, drought tolerant shrub is especially valuable as a late season nectar source for bees and butterflies. Native to the Great Basin of the western US, this very xeric and long-lived Buckwheat can thrive for decades in your landscape.
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).
(18" tall x 36-40" wide) Native to the Great Basin of the western US, Giant Sulphur Buckwheat (Eriogonum umbellatum var. devestivum) is extremely xeric once established and will live for many decades when happy. A large growing shrubby sulphur buckwheat, this variety blooms in summer/early fall with bright yellow flower clusters. Like all Eriogonum, this variety is invaluable for habitat creation in the xeric landscape providing nectar for butterflies and native bees, food for beneficial insects, and nutritious seeds for songbirds and many other small animals. Good companion plants include Mirabilis (Wild Four O’Clock), Hesperaloe (Texas Red Yucca), Penstemon, and native Salvia (Sage).
More Information
Associated SKUs
HC017851 HC017764 (Plant - 2.5" Pot) - Out of stock. HC017850 (Plant - 5" Deep Pot) - Out of stock.
Common Name
Giant Sulphur Buckwheat
Botanical Name
Eriogonum umbellatum var. devestivum
Zones
5, 6, 7, 8
Light Requirements
Full Sun
Flower Color
Yellow
Mature Height
18" tall
Mature Spread
36-40" wide
Bloom Time
Mid-summer to early fall
Ships As
Potted Plant
Soil Type
Average Soil, Sandy Soil, Well-Drained Soil
Soil Moisture
Waterwise
Advantages
Bee Friendly, Attract Butterflies, Attract Birds, Native, Extended Bloom Time (more than 4 weeks), Winter Interest, Evergreen
Growing Eriogonum (Buckwheat) Eriogonum (Buckwheat) is a large genus of mostly Western North American wildflowers that are often shrub-like with woody stems. They are very important plants for habitat creation in our gardens.
Preferred growing conditions:
Preferred growing conditions:
Plant in "lean" sandy, gravelly or garden loam soils. Avoid clay. Place in full sun.
Mulching is beneficial in the arid Western US using crushed gravel, pine needles or other coarse, non-water absorbent mulch material.
Irrigate regularly during their first growing season to establish the plants. Infrequent, deep watering is fine from the second growing season and beyond. They won't need much, if any extra water in the Eastern US.
Fertilize lightly in fall with Yum Yum Mix/compost blend.
Special comments:
Don't deadhead. Many species have very showy seed heads that are lost when plants are deadheaded. Seeds are also utilized by many insects and animals for food.
Most species are actually shrub-like and should not be cut back or divided. A light top shear in early to mid-spring to remove the previous year's flowers stems is all that is needed
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
No longer available this season.
As soon as your order is placed you will receive a confirmation email. You will receive a second email the day your order ships telling you how it has been sent. Some perennials are shipped as potted plants, some as perennial roots packed in peat. The ‘Plant Information’ section describes how that item will ship. All perennials and spring-planted bulbs are packaged to withstand shipping and are fully-guaranteed. Please open upon receipt and follow the instructions included.
Perennials and spring-planted bulbs are shipped at the proper planting time for your hardiness zone. Perennial and spring-planted bulb orders will arrive separately from seeds. If your order requires more than one shipment and all items are shipping to the same address, there is no additional shipping charge. See our shipping information page for approximate ship dates and more detailed information. If you have any questions, please call Customer Service toll-free at (800) 925-9387 or contact us by email.
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$100 and Over
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Canadian Shipping Charges
Merchandise
Shipping Charges
Up to $24.99
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$39.95
We charge one low flat rate for shipping our products even if your order requires multiple shipments. If you have any questions, please call us at (800) 925-9387.
 from all others. This durable, drought tolerant shrub is especially valuable as a late season nectar source for bees and butterflies. Native to the Great Basin of the western US, this very xeric and long-lived Buckwheat can thrive for decades in your landscape.)
