Propagating Ornamental Sweet Potato Vines – Whether you want to eat them or not, it’s worth saving the tubers to grow new plants for next year. You can store them like bulbs and plant them in containers the next spring. After you’ve cleaned out your containers for the season, rinse off the tubers and let them dry completely.
Then keep them in a cool place (like a basement) throughout the winter. Once temperatures stay above freezing in spring, plant your tubers in moist potting mix in your containers, They should sprout in a week or two. Another way you can grow more plants for a new growing season is with cuttings, known as sweet potato slips,
To start, set one end of an ornamental sweet potato tuber in a jar of water so that half of it is submerged. Leave it in a warm, sunny spot. It will send out roots and stems within 2 weeks. Once the stems reach a few inches long, snip them off the tuber and place these cuttings in another jar of water.
How to grow sweet potato vine from cuttings?
It is easy to grow sweet potato vine by taking cuttings from existing plants and rooting them in water. Use this method to fill out your summer planters or take cuttings to grow plants indoors during the winter. You can also grow clematis and honeysuckle vines from cuttings and more help for growing from seeds and cuttings,
Are sweet potatoes an ornamental plant?
By: Kathee Mierzejewski 
Growing sweet potato vines is something every gardener should consider. Grown and cared for like average houseplants, these attractive vines add a little something extra to the home or patio. Keep reading for more ornamental sweet potato info.
Can you grow sweet potatoes in hanging baskets?
Types of Ornamental Sweet Potatoes – When growing ornamental sweet potato vines, there are a number of varieties to choose from. Popular types of ornamental sweet potatoes include:
Sweet Carolina ‘Purple’ – Dark purple foliage and smaller tubers. Also a less vigorous grower. Suitable for small containers. Blackie – Nearly black foliage with deep cut leaves. Marguerite – Bold, chartreuse green foliage with heart-shaped leaves. Tricolor – Another less vigorous grower with small pointy leaves that are multicolored and variegated in shades of green, pink and white.
Are sweet potato vines indoor or outdoor plants?
Sweet Potato Vine Care – Ornamental sweet potato vines are versatile plants that are equally suitable for filling outdoor containers, spilling over a wall, or covering ground in a landscape bed. They are also popular as indoor plants and can be grown inside year-round or just during winter.
Like many rooting vines, they can be vigorous growers in the right conditions and may need frequent trimming to stay in check. The parts you trim back can be used to propagate the plant elsewhere. The plant grows best at an average temperature of 75 F and does not tolerate frost. It prefers sunny days and warm nights.
The plant is drought-tolerant but likes its water. Do not allow this plant to get waterlogged. Sweet potato vines rarely flower when the daylight is longer than 11 hours, which normally occurs outside the tropics. The Spruce / Autumn Wood skhoward / Getty Images