Plant Type

Ground cover, Perennial

 

Height Range

Under 1'

 

Flower Color

Yellow

 

Flower Season

Spring, Summer

 

Leaf Color

Green, Grey Green, Silver

 

Bark Color

n/a

 

Fruit Color

n/a

 

Fruit Season

n/a

Sun

Full

 

Water

Very Low, Low, Extra in Summer

 

Growth Rate

Moderate

 

Soil Type

Sandy, Loam, Rocky

 

Soil Condition

Average, Well-drained, Dry

 

Soil pH

Neutral

 

Adverse Factors

n/a

Design Styles

n/a

 

Accenting Features

Showy Flowers

 

Seasonal Interest

Summer

 

Location Uses

Walls / Fences, With Rocks

 

Special Uses

Container

 

Attracts Wildlife

n/a

Yellow Primrose Rock Rose is a charming, low growing perennial that blooms late spring to early summer. Simple five-petaled flowers are soft, bright yellow. Plants are 6 or so inches high and spread to 18 inches. Leaves are green to grey-green and are finely textured. Unlike some spring bloomers, Rock Rose has very nice summer foliage, making it an good choice for a groundcover, though one that isn't walked on.

Grow in well drained soil and full sun to part shade. Deadheading isn't necessary, but cutting the whole plant back by a third in mid summer can result in more dense foliage and, sometimes, a second blooming in the fall, though it will be less showy. In mild winters, foliage may be evergreen, but summer sun may score the leaves; evergreen boughs are useful as a protective cover. There are helianthemum planted at the Washington Square Demonstration Garden.