Calylophus hartwegii High Plains Yellow

High Plains Yellow Sundrops

Exclusive. 'High Plains Yellow' Sundrops is a long blooming wildflower from the western Great Plains that withstands heat, drought and rugged growing conditions. Drought resistant/drought tolerant plant (xeric).
Zones5 - 9
Advantages
Native
Light Requirements
Full Sun
Annual Rainfall
10 to 20"
20 to 30"
Mature Height4-6" tall
Mature Spread12-15" wide
Bloom TimeLate spring to late summer
ShippingNo longer available this season. Learn More…
SizeNo
SKUHC016105

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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Out of stock
SKU
HC016105

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Details
4-6" tall x 12-15" wide. A new, long blooming wildflower introduction collected from the rugged, high dry plains of eastern NM, ‘High Plains Yellow’ Sundrops is well adapted to heat, cold, wind, and drought. This prairie native thrives in harsh conditions. Beginning in late spring, colorful, red speckled buds burst open into large, brilliant yellow flowers. It’s a superb companion plant for Lavender.
More Information
Associated SKUsHC016105
Common Name
High Plains Yellow Sundrops
Botanical Name
Calylophus hartwegii High Plains Yellow
Zones
5, 6, 7, 8, 9
Light Requirements
Full Sun
Flower Color
Yellow
Mature Height
4-6" tall
Mature Spread
12-15" wide
Bloom Time
Late spring to late summer
Ships As
Potted Plant
Soil Type
Sandy Soil, Clay Soil, Average Soil
Soil Moisture
Drought Resistant / Waterwise
Amount Of Rain
10 to 20", 20 to 30"
Advantages
Native
Special Groups
High Country Gardens Exclusive, High Country Gardens Introduction
Ideal Region
West, Western Only, Southwest, Hot Desert
Planting Time
Spring / Summer, Fall
Neonicotinoid Free
Native To
North America
Item Unit Of Measure
Plant
Ships To Canada
No
Planting Guides

Tips On Growing Calylophus (Sundrops)

Calylophus (Sundrops) is a showy genus of native western species.  Closely related to Oenothera, but these perennials are day bloomers.

Preferred growing conditions:

  • Plant in fast draining sandy, rocky or light loam soils. Some species (C. hartwegii) are fine with clay in arid climates.
  • All need full sun conditions.
  • Mulch with gravel or other coarse texted non-bark mulch.
  • Keep regularly watered for the first growing season to establish the roots. Thereafter, infrequent but deep watering is preferred.
  • Fertilize lightly in fall with Yum Yum Mix/compost blend.

Special comments:

  • Deadheading is not needed as these plants are naturally long blooming. Cut back hard in early to mid-spring to a height of 2 to 3 inches.

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.

Shipping Rates

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US Shipping Charges

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$80 to $99.99$13.95
Over $10015%

Canadian Shipping Charges

Merchandise Shipping
Charges
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$25 to $49.99$19.95
$50 to $74.99$24.95
$75 to $99.99$29.95
Over $100$39.95

We charge one low flat rate for shipping our products even if your order requires multiple shipments. If you have any questions, would like to purchase expedited shipping, or have quetions about shipping to Alaska or Hawaii, please call us at (800) 925-9387.

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