O.speciosa, a perennial with rosettes close to the ground, mid-green, lance-shaped leaves 1-2 inches long. The delicately fragrant white primroses, sometimes turning to pink, open in the daylight hours, blooming from June to August. Best planted in spring among other […]

Clump-forming perennials with spoon-shaped leaves in green, 1 to 2 inches long. Funnel shaped yellow primroses open in the daytime during the summer months. Best planted in spring among other full sun plants. You should divide the clumps every 3 […]

O.pallida is a rhizomatous perennial with lance-shaped, green leaves 1 to 2 1/2 inches long, producing scented white primroses that open in the evening and turn to pink at maturity. Best planted in spring among other full sun plants. You […]

O. macrocarpa is a perennial with trailing stems with a red-tinted color, branching from a central rootstock. Leaves are egg-shaped in a pale to mid green. Bright yellow primroses in a cup shape, to 5 inches across with red flecked […]

O.laciniata is an erect annual or short-lived perennial producing cup shaped, red edged yellow primroses 1/2 to 1 1/4 inches across. It opens in the evening. Stems are green or red flushed and hold deeply lobed mid-green leaves 1 1/2-6 […]

O. glazioviana produces bowl-shaped yellow primroses 2 to 3 inches across, with red-tinged outer calyx, opening in the evening. This upright biennial bears hairy mid-green leaves to 8 inches long; a bit smaller leaves grow on the red-spotted stems. Best […]

‘Youngii’ produces clear yellow flowers. Leaves turns bright red in autumn. An upright perennial or biennial with lance-shaped green leaves 1 to 4 1/2 inches long. These bright yellow primroses open during the day. Best planted in spring among other […]

An upright perennial or biennial with lance-shaped green leaves 1 to 4 1/2 inches long, after a frost leaves turn dull red. Produces 3-10 cup-shaped deep yellow flowers 1 to 2 inches across. These bright yellow primroses open during the […]

‘Summer Solstice’ blooms in bright yellow flowers on foliage of deep green, leaves turn to bright red in summer and burgundy-red in the autumn months. An upright perennial or biennial with lance-shaped green leaves 1 to 4 1/2 inches long. […]

Upright perennial or biennial with lance-shaped green leaves 1 to 4 1/2 inches long, after a frost, leaves turn dull red. Masses of bright yellow colored flowers open during the day from May to July. Best planted in spring among […]