This All America winner is a great cool season bedding plant that performs well in the south during the winter and extending the colorful growing season into the fall. The delicate coral rose diascia flowers on 10"-12" tall plants are perfect for containers. Give this plant full sun to partial shade and any good garden or potting soil. It needs little attention to keep blooming season after season. Diascia is actually a short-lived perennial, but is often treated as an annual. The hardiness of the plants is yet to be fully determined. I have had plants blooming outside until Thanksgiving in my Zone 5 garden through several light frosts. When a hard freeze threatens, I bring them into an unheated but above-freezing porch, where they go semi-dormant. They revive in the spring, put on a flush of growth and go back to flowering. I think they might survive winter much like snapdragons if mulched in Zone 7 and above, maybe even Zone 6. Otherwise, winter the plants indoors or discard like annuals. They will bloom right through light frosts. Width 12-14 inches.
|Tips on How To Grow Diascia (Twinspur)|
Diascia needs light to germinate. Just press seed lightly on top of the moist soil, (place soil into growing container, and wet up before placing the seed) do not cover. Sow 4-6 weeks before last frost.
Keep soil moist, seed will germinate within 2 weeks. Wait for 2 sets of true leaves before transplanting. Diascia needs regular water, but it doesn’t like to sit in wet soil. If growing in a container, make sure there are good drainage holes. OR plant seeds directly in the garden when the temperature is consistently above 65 F. or 18 C.
Diascia prefers cooler temperatures and flowers best in the spring and fall. If your plants start to fade in the heat, cut them back to a few inches and keep them watered. They will perk back up when it cools off. Although not hardy down to Zone 6, gardeners in Zones 6 - 8 may be able to over-winter plants with mulching.
Diascia generally performs best in full sunlight, but benefits from afternoon shade in hot climates. Soil should be well-drained, moist and fertile.Regular feeding with a standard garden fertilizer supports blooming. Be sure to water the fertilizer in to prevent burning the roots.