Eriogonum umbellatum Gentle Giant
Gentle Giant Sulfur Buckwheat
DetailsGentle 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.
|Common Name||Gentle Giant Sulfur Buckwheat|
|Botanical Name||Eriogonum umbellatum Gentle Giant|
|Zones||4, 5, 6, 7, 8|
|Light Requirements||Full Sun|
|Mature Height||18-24" tall|
|Mature Spread||24-28" wide|
|Bloom Time||Early to mid summer|
|Ships As||Potted Plant|
|Planting Time||Spring / Summer, Fall|
|Soil Moisture||Drought Resistant / Waterwise|
|Amount of Rain||10 to 20"|
|Advantages||Deer Resistant, Bee Friendly, Native, Evergreen|
|Special Groups||High Country Gardens Exclusive, High Country Gardens Introduction|
|Ideal Region||Western Only, Suitable Above 7000 ft, Southwest, West, Pacific Northwest|
|Neonicotinoid-Free||Yes - Learn More|
|Ships to Hawaii, Alaska & Canada||No|
The shrubs and trees we sell are 1-2 year-old seedlings. These young plants appreciate some extra attention during their first 3 years in your landscape.
Preferred growing conditions:
- Check each species soil preferences before planting. Some do well in clay while others do not.
- Mulch with common mulching materials. As they get larger (2 ft. or more in height), thicken the mulch layer to a depth of 2-3 inches.
- Even xeric (waterwise) species will establish better and grow more quickly when given regular irrigation during the first 3 years in the garden. As they begin to reach maturity, watering frequency can be reduced to a good deep soaking every 10 to 14 days during the heat of summer.
- Plant in full sun or part sun depending on plant preference.
- Dig a wide but shallow hole and enrich the soil with ample amounts of compost and Yum Yum. This will help them to grow and mature more quickly. Special comments:
- Most native shrubs and trees are highly recommended for providing wildlife habitat (nesting spots, fruit or seeds for songbirds and mammals, nectar for pollinators).
- They are excellent for use to grow as natural (un-sheared!) hedges along fences, property lines and driveways. They live for many years once established. Garden Care:
- Fertilize in the fall with Yum Yum Mix and good quality compost. This is most important during the first 3 years in the landscape. Established plants don't need to be fertilized (unless growth is stunted by extremely poor soils).
- Where browsing animals (rabbits, deer and others) are a problem, it is advisable to protect young plants with a wire cage. These can be removed after 3-4 years in the ground.
- Mulching is essential to maintain the soil moisture these woody plants need to establish their deep growing roots. Be sure and replenish the mulch in fall and summer to keep it sufficiently deep.
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 and bulb orders arrive within 2-6 days, or less, of leaving our greenhouses in Colorado. This prompt delivery is provided without additional express charges.
Grass Plugs Will ship at planting time in spring, 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.
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).
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