Guinea Flower
Guinea Flower (Hibbertia spp.) is a flowering perennial of the Dilleniaceae plant family. It's native to the South Pacific islands of New Guinea and Australia. It's an evergreen shrub that typically grows to 5 to 6 feet in height and spread. Its graceful foliage consists of glossy, ovate to oblong-lanceolate leaves that are olive colored. Guinea Flower blooms during late winter and spring with clusters of bright yellow, star-shaped flowers. This flowering shrub is rarely available to plant in English warm-climate gardens but can be found in specialty nurseries and online.
Guinea Flower is drought-tolerant, and it should not be overwatered as it may cause root rot and other fungal diseases. Water it once or twice a week with 1 to 2 inches of water. In hot, dry weather to help the plant retain moisture, it should be watered more regularly. Mulching the soil around the base of the plant helps conserve moisture.
Guinea Flower prefers full sun for best performance. It will tolerate shade, but flowering will be reduced in shade. It needs full sun in order to flower robustly and abundantly.
Guinea Flower prefers temperatures of 60 to 75°F (15-24°C). It can tolerate temperatures up to 90°F (32°C). It should be protected from cold temperatures below 50°F (10°C).
Guinea Flower grows best in humid climates and should be kept in an area that has moderate to high humidity. Increase humidity by misting regularly with water or group plants together to increase the humidity around the plant.
Guinea Flower grows best in a light, well-draining soil with a pH between 6.0 and 7.0. Sandy, loamy or clay soils can all be suitable as long as they are well-draining. Avoid heavy soils that retain too much water.
Fertilize with a balanced liquid fertilizer once a month during the growing season. Avoid fertilizing during the rest period as the shrub needs this time to store energy in its roots. A slow-release fertilizer can also be used, but be sure to follow the directions on the package.
Guinea Flower is susceptible to mealybugs, spider mites, aphids, and scale insects. These pests cluster on the underside of leaves sucking the plant's sap. As their populations increase, the entire plant can be quickly overwhelmed. Mealybugs are easily identifiable due to their white, cottony appearance. Spider mites web on the underside of leaves, and aphids should be visible at the points of new growth on the plant. To control these pests, first, remove any affected leaves or stems. These insects are sensitive to naturals sprays such as neem oil and insecticidal soaps. Spray the affected area with the solution and repeat every few days until the infestation is controlled.
Guinea Flower does not typically need to be repotted unless the pot becomes too small for the plant or the roots become crowded. Whenever possible, repot in the spring or early summer. It is wise to use a pot that is slightly larger than the previous one. Use a potting mix that is well-draining and rich in organic matter to ensure adequate aeration and drainage.
Guinea Flower is amenable to pruning. It can be pruned to create a neat, compact shrub that shows off the leaves and flowers better. Be sure to use sharp pruning shears and prune in the late spring to early summer after the flowering has finished.
Mulching around the base of the Guinea Flower with organic material such as compost, aged manure, or shredded bark helps the soil retain moisture and suppress weeds. It also adds valuable nutrients to the soil.
Guinea Flower can be propagated from stem cuttings taken in late spring. Collect six-inch semi-ripe cuttings with two or more leaf nodes. Dip the cut end of each cutting in rooting hormone then plant in moist potting mix. Place cuttings in bright, indirect light and keep the soil moist until rooting has occurred. When the new growth appears, the plants can be transplanted to individual containers.
Decorative bamboo stakes or ornamental obelisks can be used for support when the plant gets top-heavy and needs staking. Make sure there is no damage to the stems or leaves when adding any support.
Guinea Flower prefers a dry, cool rest period from late fall to early spring. During this time, water less frequently and withhold fertilizer to give the plant time to go dormant. This rest period is not absolutely necessary, but it will help the plant produce abundant blooms in the spring.
Guinea Flower is not toxic to pets or humans.
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