These bright flowering plants are also called Primula, which is their genus name.Proper planting and culture can prevent many primula plant problems, but it is a good idea to become familiar with some of the diseases and pests of primula. Primrose Plant Problems: Common Diseases And Pests Of Primula. Primroses are woodland flowers that come in vivid colors you might not expect from spring-blooming perennial flowers. Primrose is propagated in two ways by dividing the bush after flowering and seeds. Primrose are among the first flowers to bloom in spring, and they grace many gardens around the country. Seed production takes energy from the plant which prevents the chance for a second flowering period in some varieties. Primroses sold during winter usually are considered short-term houseplants. Garden varieties are not toxic and almost never cause allergies. Most primroses and primulas have finished flowering by now, and where they have formed big clumps, it's a good idea to split them up. Dead flower heads are also unattractive and can attract pests to nest on the plant. Feed primroses annually each spring with 10-10-10 ratio fertilizer applied at a rate of 1 pound per 100 square feet of area. Proper planting and culture can prevent many primula plant problems, but it is a good idea to become familiar with some of the diseases and pests of primula. In many species, the flowers are fragrant and they are all popular with pollinators and butterflies. These bright flowering plants are also called Primula, which is their genus name. The evening primrose has hairy leaves that emit a lemon odor and bright yellow, 2 1/2-inch wide flower spikes that bloom in the evening and close during the daytime. Primroses and polyanthus can be divided either immediately after flowering or in early autumn. Chinese Primroses (Primula sinensis) (zone 10) are somewhat tender perennials, and as such are best suited as a potted plant indoors. The star shaped, white, pink, lavender or coral flowers are clustered on 8 inch stalks. They are planted in the garden after flowering. I fed mine in the Spring and again after flowering in the early Summer and it did fine. After-bloom trims improve both the vigor and appearance of your phlox plants. Often, florist’s cyclamen is considered a seasonal gift. It is often found in flower shops in early spring. It can be difficult to get a cyclamen to rebloom, so the plant is frequently discarded after it has lost its beauty. The entire plant is edible and often used for medicinal purposes. Unlike the subtle pastels associated with spring, primroses shout out in bold yellows, reds, pinks, and blues. Groups of yellow spots turning darker in colour on the underside of leaves can be identified as Primula Rust – this is not an invasive problem, and the leaves can either be left or … The seeds are … Keep slugs away with pellets or beer traps if they prove a problem.