Botanical Name: Calylophus hartwegii Add
Common Name: Sundrops 'Sierra Sundrop'  
Plant photo of: Calylophus hartwegii
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  • Anatomy

  • Culture

  • Design

Plant Type

Shrub, Ground cover, Perennial


Height Range

Under 1'


Flower Color



Flower Season

Spring, Summer, Fall


Leaf Color

Light Green


Bark Color



Fruit Color



Fruit Season



Full, Half



Very Low, Medium, Extra in Summer


Growth Rate



Soil Type

Sandy, Rocky


Soil Condition

Average, Well-drained


Soil pH



Adverse Factors


Design Styles

Meadow, Mediterranean, Wild Garden


Accenting Features

Showy Flowers


Seasonal Interest

Spring, Summer, Fall


Location Uses

Perennial Border, Parking Strip, Patio, Raised Planter, Walkways, With Rocks


Special Uses

Container, Naturalizing, Small Spaces


Attracts Wildlife


Information by: Jerry Sortomme
Photographer: Susan Frommer
  • Description

  • Notes

This low-growing perennial grows 1' x 2' and has rhizome spreading, woody stems with bright green leaves. It produces large, lemon yellow flowers that are up to 4" across and bloom spring through summer. 'Sierra Sundrop' a select strain.
Planting Instructions: 1. Dig a hole 2 times the width and 1 and 1/2 times the height of the container. 2. Set rootball at ground level. 3. Prepare soil mix of equal parts soil and soil amendment. 4. Backfill with amended soil. 5. Build Basin and water.