How to Grow Periwinkle

Periwinkle (Catharanthus roseus) is a reliable bedding plant that's hardy in all zones. In the north it's an annual and blooms until frost, but in warm climates this little garden favorite is a perennial. Small dark green glossy leaves are adorned with flat, one-inch, five-petal blooms. Perfect for mass plantings, it's also a reliable choice for containers and window boxes. Here's how to enjoy the perky periwinkle.

Things You'll Need

• Periwinkle
• Garden trowel
• Water
• Mulch (optional)

Instructions

1. Choose a planting site. Periwinkle is an excellent bedding plant for sunny, dry locations. Average, well-drained soil is all that is required. Periwinkle will tolerate some shade, but flowering will be reduced. Plants should be spaced 10 to 12 inches apart. Allow for adequate spacing when choosing a site.

2. Purchase the plants. Flats of periwinkle containing individual plugs of the flower are readily available at nurseries and garden centers in spring. Available colors are usually white, pink, red and purple.

3. Plant the plugs. Use a garden trowel to dig a small hole slightly larger than the soil covered roots and at the same depth they were growing in the packs. Gently backfill the original soil and firm the soil around the transplant with your hands. A granular or water soluble fertilizer may also be applied. Follow label instructions carefully.

4. Water the transplants and cover with a thin layer of mulch if desired. Water periwinkle regularly during dry periods.

Tips & Warnings

• Periwinkle requires little maintenance. Fertilize periwinkle again in mid-summer to encourage blooming. Unlike many annuals, periwinkle does not require dead-heading. Water during periods of little rain.

• There are many varieties of periwinkle to choose from and can range in height from 4 to 15 inches. Check the plant tag when purchasing plants to determine its growth habit.