Delosperma nubigenum
Delosperma nubigenum has bright yellow single flowers over a long season and may be hardy to zone 3.

Delosperma nubigenum has bright yellow single flowers that burst into colour in early summer and continue right through fall. Ice plants are long-blooming and carefree succulent mat-forming perennials similar to stonecrops that thrive in heat, drought and nearly any well-drained soil. Very hardy but should be protected from winter wet either with very well drained soil or in the rainshadow of a house or other structure. Great in containers and living walls. Deer resistant. Some say hardy to zone 3.
Common Name: Ice Plant
Family: Aizoaceae (The Carpet Weed Family)
Zone Hardiness: 4-9
Light: Full Sun
Height: under 4"
Width: 8-12"
Primary Bloom Colour: Yellow
Secondary Bloom Colour: Yellow
Bloom Time: Spring - Fall
Foliage Colour: Green
Class: Semi-evergreen
Type: Perennial
Soil Moisture: Drought Tolerant, Dry
Stem Colour:
Fragrance: No
Berries:
Benefits: Bees
Deer Resistant: Yes
BC Native: No
Native Habitat: Disturbed sandy spots.
Award:
Geographical Origin: