Sweet potatoes (Ipomea batata) are a much ballyhooed southern food staple. Valued primarily for their tuberous roots, they also boast an edible leaf. That, however, is not the end of their story. Some cultivars find use strictly as an ornamental. While not the subject of this article, you will typically find these dangling over rock walls or cascading from a hanging basket. While these can be quite impressive, this article will focus on the edible version of this plant, and its nutritional benefits.
UF/IFAS photo: M. Bailey
What Cultivar?
As with any vegetable, these have been heavily bred to optimize growth and yield in our southern environment. In Florida’s Panhandle, ‘Centennial’ and ‘Beauregard’ are two varieties that perform admirably. They have a vining growth habit and are very productive. For those gardeners with less space, ‘Vardaman’ sweet potatoes. This cultivar has a bushy growth habit rather than a trailing vine.
Planting
Sweet potatoes are not planted by seed, but rather from a “slip”. These are the vegetative growth from the mature sweet potatoes. While it is possible to grow these yourself, it is better to utilize certified disease-free slips from a reputable garden supply store. Use slips that are 6 to 9 inches long, planting them in rows 48 to 54 inches on center, with plants spaced 12 inches apart.
Sweet potatoes can be planted in early spring through late June. These plants thrive in sandy soils, which are typical in the Panhandle with very little fertilization (approximately 0.04 lbs. of N on a 10 x 3-foot row). The downside to sweet potatoes is their exceptionally long growth season of 100 to 150 days after planting.
UF/IFAS photo: J. Criss
Pests
There are some pests which you’ll need to be wary when growing sweet potato. Most notably of these is the sweet potato weevil (Cylas formicarius). Even small amounts of damage from this insect can induce sweet potatoes with a foul taste. Control them through cultural practices such as turning your soil several months prior to planting, and adequate irrigation. Wireworms and beetle larvae are also concerns with sweet potatoes. Sample for grubs throughout the growing season, remove vegetation post harvest, and rotating your crops will keep these pests at bay. If all else fails, there are insecticidal options available. Consult your local extension agent to choose the appropriate option.
Sweet potato weevil UF/IFAS Photo: L. Buss
Time to Cure
Post harvest, sweet potatoes should be placed in a dark 85° room with 90% humidity for about two weeks. This is known as curing and will convert some of the starches of this vegetable to sugar making it slightly sweeter. Once the curing process is finished, store them in a cool, dry pantry at temperatures below 50°. This will keep them a viable staple in your pantry for several months.
The end result of all this work will be a food high in vitamin A, vitamin C and fiber that can be used for anything from home fries to pies.
To Sum Up
Growing your own vegetables in your own garden is a very rewarding experience. Sweet potatoes are an easy way to produce a lot of food for your family. If you’d like to know more about growing sweet potato, please consult these document. For more information on this topic or any other horticultural concern please contact your local U/IFAS extension office here.
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