Eriogonum umbellatum Gentle Giant

Gentle Giant Sulfur Buckwheat

Gentle Giant Sulphur Buckwheat (Eriogonum umbellatum 'Gentle Giant') is an especially large-growing selection of the western native E. umbellatum, blooming with a profusion of bright yellow flat-topped flowers in early summer.
Zones4 - 8
Advantages
Bee Friendly
Deer Resistant
Native
Evergreen
Light Requirements
Full Sun
Annual Rainfall
10 to 20"
Mature Height18-24" tall
Mature Spread24-28" wide
Bloom TimeEarly to mid summer
ShippingNo longer available this season. Learn More…
SizePlant - 5" Deep Pot
SKUHC015426

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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SKU
HC015426

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Gentle Giant Sulphur Buckwheat (Eriogonum umbellatum 'Gentle Giant') blooms with a profusion of bright yellow flat-topped flowers in early summer. An especially large-growing selection of the western native E. umbellatum, this long-lived shrubby perennial is an excellent choice for planting in the hot, dry, poor soil. It will attract numerous native bee species and other beneficial insects. This is an especially attractive companion plant for pairing with English and French hybrid lavenders.
More Information
SKUHC015426
Item Package Size
Plant - 5" Deep Pot
Common Name
Gentle Giant Sulfur Buckwheat
Botanical Name
Eriogonum umbellatum Gentle Giant
Zones
4, 5, 6, 7, 8
Light Requirements
Full Sun
Flower Color
Yellow
Mature Height
18-24" tall
Mature Spread
24-28" wide
Bloom Time
Early to mid summer
Ships As
Potted Plant
Soil Moisture
Drought Resistant / Waterwise
Amount Of Rain
10 to 20"
Advantages
Bee Friendly, Deer Resistant, Native, Evergreen
Ideal Region
West, Western Only, Southwest, Pacific Northwest, Suitable Above 7000 ft
Planting Time
Spring / Summer, Fall
Item Unit Of Measure
Plant
Ships To Canada
No
Planting Guides

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, there is no additional shipping charge. See our shipping information page for approximate ship dates and more detailed information. If you need express shipping or have any questions, please call Customer Service toll-free at (800) 925-9387 or contact us by email.

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