Vincas are very tough, resilient flowers that thrive in hot
summer weather. Sometimes called Madagascar periwinkle, vinca has deep green foliage that
smothers out weeds and non-stop flowers that shed cleanly so they never need trimming. Not
long ago, vincas were only available in white and lilac, but now you will find a much
broader selection of colors. To prevent possible diseases, do not plant vinca in the same
spot year after year. Also, avoid planting until the weather is dependably warm in
spring--at least 2 weeks after the last frost.
fertilized, vincas will bloom
continuously from the time they are planted until frost. When planting vincas in
cultivate the planting site at least 8 inches deep and mix in a 2-inch deep layer of
flower planting mix, compost, or other type of organic matter. Just before
in a timed-release fertilizer that contains all three primary plant
nutrients. A high
middle number in the fertilizer analysis, such as 11-40-6, indicates extra
which will help the plants develop extensive roots.
prolifically in summer heat, and you may not need to fertilize plants a second time to
keep them healthy. However, if growth slows or you notice older leaves turning
fertilize your vincas lightly with 17-17-17 containing timed-release
this "booster feeding" into the soil between the plants and water
growing vincas in containers, fertilize them more often by sprinkling a teaspoon of
fertilizer per plant atop the soil in the pots about once a month.