Calylophus serrulatus

Dwarf Sundrops

This xeric wildflower, native to the western Great Plains, blooms most of the summer with a profusion of bright yellow flowers. This is a tough colorful species that gently re-seeds itself when happy. Drought resistant/drought tolerant plant (xeric).
Zones4 - 9
Advantages
Deer Resistant
Attract Butterflies
Bee Friendly
Low Maintenance
Native
Groundcover
Rock Gardens
Multiplies / Naturalizes
Light Requirements
Full Sun
Annual Rainfall
10 to 20"
20 to 30"
30 to 40" (with care)
Mature Plant Size6-8" tall 15" wide
Bloom TimeLate spring to late summer
ShippingNo longer available this season. Learn More…
SizePlant - 2.5" Pot
SKUHC014487

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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Product is Out of Stock
$6.99
Per Plant - 2.5" Pot
Out of stock
SKU
HC014487

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Details
6-8" tall x 15" wide (cutting propagated). A little known native from the short grass prairies of the western Great Plains. But not for long! A heavy bloomer from late spring through the summer, this tough plant will be the star of your xeriscape. Dwarf Sundrops likes a lean, well-drained soil and a good shearing before the growing season in late spring to keep it looking tidy and loaded with flowers. A fine companion plant for Nepeta and Penstemon.
More Information
SKU
HC014487
Item Package Size
Plant - 2.5" Pot
Common Name
Dwarf Sundrops
Botanical Name
Calylophus serrulatus
Zones
4, 5, 6, 7, 8, 9
Light Requirements
Full Sun
Flower Color
Yellow
Height
12 inches
Mature Height
6-8" tall
Mature Spread
15" wide
Bloom Time
Late Spring - Early Summer, Early - Mid Summer, Mid - Late Summer
Bloom Time
Late spring to late summer
Ships As
Potted Plant
Soil Type
Low Fertility Soil, Well-Drained Soil
Soil Moisture
Drought Resistant / Waterwise
Amount Of Rain
10 to 20", 20 to 30", 30 to 40" (with care)
Advantages
Deer Resistant, Attract Butterflies, Bee Friendly, Low Maintenance, Native, Groundcover, Rock Gardens, Multiplies / Naturalizes
Ideal Region
Western Only
Planting Time
Spring / Summer, Fall
Native To
North America
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.

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