Periwinkle (Vinca Rosea Dwarf Little Blanche) white is a trouble-free delight in the flower garden. Grown from Periwinkle seeds, it begins blooming in early summer with big, pure white flowers. The flowers continue in full force for months, despite extreme heat, drought, and poor soil.
Sow Periwinkle ground cover seeds indoors 6 - 10 weeks before the last frost is expected. Cover the seeds with 1/4 inch of potting mix, spray with water to moisten, and press down lightly. These flower seeds will not germinate in any sort of light, so cover trays or containers with a black plastic sheet or a newspaper. Lift the plastic or newspaper regularly to moisten by misting.
Once seedlings emerge, they need bright light. At about 2 - 3 inches tall, transplant the strongest plants into individual pots. Periwinkles can be moved outside once the temperature is consistently above 65F degrees.
Directly sowing Periwinkle seeds is not recommended, but if you choose to direct sow, follow the same steps as above. Wait until the danger of frost has passed and temperatures are consistently warm, and prepare the soil well so that it is light and fine.
Season: Annual USDA Zones: 3 - 10 Height: 8 - 10 inches Width: 24 - 36 inches Bloom Season: Summer through fall Bloom Color: White Growth Rate: Fast Environment: Full sun Foot Traffic: Light Soil Type: Moist, well-drained, pH 6.1 - 7.8 Deer Resistant: Yes
Temperature: 65 - 70F Average Germ Time: 10 - 14 days Light Required: No - complete darkness to germinate Depth: 1/4 inch Sowing Rate: 2 - 3 seeds per plant or approximately 2,000 seeds covers 50 square feet Moisture: Keep seeds moist until germination occurs Plant Spacing: 6 - 9 inches