Calylophus hartwegii High Plains Yellow
High Plains Yellow Sundrops
Details4-6" 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 to into large, brilliant yellow flowers. It’s a superb companion plant for Lavender.
HBLE321 (Plant - 2.5" deep pot) - Out of stock.
HBLE351 (Plant - 5" deep pot) - Out of stock.
|Common Name||High Plains Yellow Sundrops|
|Botanical Name||Calylophus hartwegii High Plains Yellow|
|Zones||5, 6, 7, 8, 9|
|Light Requirements||Full Sun, Morning Sun & Afternoon Shade|
|Mature Height||4-6" tall|
|Mature Spread||12-15" wide|
|Bloom Time||Late spring to late summer|
|Ships As||Potted Plant|
|Planting Time||Spring / Summer, Fall|
|Soil Type||Clay Soil, Sandy Soil, Average Soil|
|Soil Moisture||Drought Resistant / Waterwise|
|Amount of Rain||10 to 20", 20 to 30"|
|Advantages||Deer Resistant, Attract Butterflies, Native, Extended Bloom Time (more than 4 weeks)|
|Special Groups||High Country Gardens Exclusive, High Country Gardens Introduction|
|Ideal Region||Western Only, Hot Desert, Southwest, West|
|Neonicotinoid-Free||Yes - Learn More|
|Ships to Hawaii, Alaska & Canada||No|
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.
- 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.
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 orders will 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.
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.
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Comments about High Country Gardens Calylophus hartwegii High Plains Yellow:
Plant came healthy and already have flowers, very happy with this plant.
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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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