PrimrosePrimrose obconica and Primrose malacoides are wonderful houseplants and should be treated as an annual whether they are grown indoors or out. They can bloom late winter through early spring. Primrose malacoides, also known as the Fairy Primrose, will have some 20-30 blooms borne on hairy stems and can get 18-20" tall. They will have blooms in shades of mauve to bright pink. Blooming season is from mid-winter to early spring. Primrose obconica, also known as German Primrose, are great bloomers and will have colors in hues of blue, red, and white. The flowers are about an inch across and are borne on hairy stems. They can reach a foot in height and bloom from mid-winter to early spring. The leaves are hairy and somewhat rounded; some people can have a dermal reaction to the leaves of Primrose obconica.
Light: Primrose requires bright indirect light.
Temperature: Primrose prefers cool temperatures, 50 to 60 F. When grown in temperatures above 60 F, high humidity must be provided so as not to decrease the bloom time. A tray or saucer of moist gravel can help add humidity.
Water: Keep plants moist but make sure they do not sit in water.
Fertilizer: Fertilize every two weeks with a blossom booster.