Vinca plant care flowers are easy-care plants that add blooms to the garden from spring through frost. These trailing annuals are also tolerant of heat, drought and full sun. They are also low-maintenance plants, requiring only water and regular fertilization. When planting vinca, be sure to choose a location that will allow the plant to spread. It grows best in full sun, but can tolerate some shade if the soil is rich enough.
When planting, make the hole larger than the root ball and loosen the soil around the roots with your fingers to promote a good root system. Set the seedlings into the holes 8 to 12 inches apart if you are using them in beds or borders, or 18 to 24 inches apart if you are establishing them as ground cover. Water the newly planted vines thoroughly to ensure that all of the roots are wet. It is preferable to water the plants in the morning to give them a chance to dry by nightfall and to avoid disease and fungal infections.
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If you are growing vinca from seeds, sow them indoors 90 to 96 days before the last expected frost date in your area, suggests Burpee. Sow them in a seed-starting mix and transplant them to the garden once they have two sets of true leaves. You can also grow annual vinca from cuttings taken from a mature plant in early spring. Dip the end of a cutting in hormone rooting powder and place it in well-draining potting soil in a pot or container, then cover it with a plastic bag or lid and set it in a sunny window.