To thrive in USDA zone 3, creeping plants must tolerate average annual lows to minus 40 degrees. Gold-moss or stonecrop (Sedum acre) is hardy in zones 3 to 8 and grows from 1 to 2 inches tall. This creeping, deciduous groundcover forms a low mat and blooms in spring with yellow flowers. It prefers sun to partial shade and well-draining, acidic, gravelly soil. Woolly yarrow (Achillea tomentosa) grows from 6 to 12 inches tall and spreads into a mat of aromatic, gray-green foliage. This evergreen blooms with bright-yellow flower clusters and is hardy in zones 3 to 8. It prefers full sun and well-drained soil.
USDA zone 4's average annual lows reach minus 30 degrees. Cushion spurge (Euphorbia polychrome) is hardy in zones 4 to 8 and grows to 18 inches tall with a 3 foot wide spread. This creeping, deciduous groundcover produces chartreuse-yellow bracts and has green foliage that turns red in fall. Cushion spurge grows well in sun to light shade and sandy, well-draining soil. The common woadwaxen (Genista tinctoria) grows slowly to 3 feet tall with an equal spread. This deciduous plant grows as a low shrub or groundcover and blooms with spikes of bright-yellow flowers from summer through fall. Common woadwaxen is hardy in zones 4 to 7 and prefers full sun and well-draining soil.
Plants hardy to USDA zone 5 tolerate average lows to minus 20 degrees. Green and gold (Chrysogonum virginianum) is hardy in zones 5 to 9. This creeping semievergreen blooms with bright-yellow, five-petaled flowers in spring and has glaucous-green foliage. It grows from 6 to 9 inches tall and prefers sun to partial shade and well-draining soil. Yellow epimedium (Epimedium x perralchicum) blooms with tiny, bright-yellow flowers atop wiry stalks in spring. This creeping perennial has heart-shaped foliage and is hardy in zones 5 to 8. Yellow epimedium grows well in light to partial shade and moist, well-draining, fertile soil.
In USDA zone 6, average lows reach minus 10 degrees. Carolina jasmine (Gelsemium sempervirens) grows to 3 feet tall with a 20- to 30-foot spread. This creeping evergreen plant grows as a vine or groundcover and blooms in spring with bright yellow, trumpet-shaped flowers. It is hardy in zones 6 to 9 and prefers sun to light shade and rich, acidic, well-draining soil. Aaron's beard (Hypericum calycinum) grows quickly from 12 to 18 inches tall with a wide spread. This evergreen has dark- to blue-green leaves and blooms with single, bright-yellow flowers in summer. It is hardy in zones 6 to 10 and prefers sun to partial shade and acidic, loamy soil.