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Growing Vinca (annual)

Growing Vinca (annual)

Jams n' Jellies Blackberry

Jams n' Jellies Blackberry item #08035

 

Description

Annual vinca, sometimes called Madagascar periwinkle or cape periwinkle, is a flowering annual originally native to Madagascar. Breeders have expanded the flower size and showiness and expanded their color range. Vinca is very heat tolerant and thrives in hot, humid conditions. It is a good choice for borders, massed planting, and in containers. Varieties with mounded or trailing habits are available, and trailing types are excellent in hanging baskets and mixed containers.

How To Plant

Seed can be started indoors 8 to 10 weeks before the last spring frost. Plant seed ¼ inch deep, as darkness promotes germination. Germinate at 70 to 80 degrees, and expect seed to sprout in 15 to 20 days. Harden off seedlings and transplant outdoors after all danger of spring frost has passed.

Maintenance

Annual vinca is easy-to-grow in any well-drained soil. It grows best in full sun but tolerates partial shade. Planting in raised beds can help improve drainage in heavy clay soils. it prefers a slightly acidic soil. 

Fertilizer Recommendations

Annual vinca is a moderate feeder and benefits from regular fertilization. Use full rates of  ALGOplus All Purpose 6-6-6 liquid fertilizer or Neptune Fish & Seaweed Fertilizer 2-3-1

Common Problems

As long as it is properly sited, annual vinca is usually free from serious pest and disease problems. Slugs and snails may attack plants. Stem and root rots can occur when plants are grown in overly wet or soggy soil, especially when temperatures are cool. Leaf yellowing due to iron deficiency can occur if soil pH is above 6.0. Sluggo Plus organic bait can be used to control snails and slugs.

Alternative Products

Other heat and drought-tolerant annuals are Queen Mixed cleome, scarlet sage, and zinnia.

Product Recommendations

Al's Flower Pouch can be used as an alternative to hanging baskets for trailing forms.

Vinca Facts

Annual vinca is classified as Catharanthus roseus. It has a long history of medicinal use and is the source of the anti-cancer compounds vincristine and vinblastine.

 

Do you have specific questions related to your garden? Email info@jungseed.com and let our years of expert experience help your garden grow!

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