This helps to warm and insulate the soil. If you grow sweet corn, you have ready-made trellises for a late planting of pole beans. Here’s how it’s done: About six weeks before it’s time to plant sweet potatoes outdoors, place the roots in a box of moist sand, sawdust, or chopped leaves in a warm spot (75 to 80 degrees). Get Your Timing Right. What you’ll do is take a sweet potato and cut it in half. Growing sweet potatoes works best in loamy, well-drained soil. Have you ever considered growing sweet potatoes vertically? Overwinter plants in a frost-free greenhouse or windowsill. Sweet potatoes grow best within U.S. Department of Agriculture plant hardiness zones 9 and above. Vertical melon growing shares all of these benefits. It is important to have a good soil mix when planting in your containers. Purdue University: Thanksgiving in Space May One Day Come With All the Trimmings, Colorado State University Cooperative Extension: Container Growing, Purdue University Cooperative Extension Service: The Sweet Potato. Have you ever tried to grow sweet potato vines on trellis? trimmed. The sweet potato (Ipomoea batatas) is tolerant of a wide range of cultural practices, but is intolerant of cool temperatures, especially if the grower is seeking large tubers. Combine equal parts compost, peat moss and vermiculite. Use your hands to lightly tap the soil over the base of the plant. How to Grow Sweet Potatoes in a Container With a Trellis. Insert the trellis poles into the soil at the back of the container and pack the soil around them to hold the trellis in place. The foliage lends a tropical feel to the garden and comes in a range of colors and varying forms. Pole beans can share a trellis with other climbers such as tomatoes. While horticulturists with Purdue University recommend the use of a conical wire cage, such as those used for tomato plants, a trellis will work as well. A trellis can also be used for growing sweet potatoes For best results, wait until evening temperatures remain above 60 degrees Fahrenheit to plant sweet potato slips, and choose a variety with a shorter maturity time, such as Beauregard (90 days to harvest). Excess length or vines growing away from the trellis can be Shoots will sprout, and when they reach 6 to 9 inches long, cut them off the root. Frost will kill the vine and the potato growing beneath the soil. Use a light, porous soil mix. Choose a design which is strong enough to support the Starting Your Slips Choose a sweet potato. supports. Her articles have appeared at Trulia.com, SFGate.com, GardenGuides.com, RE/MAX.com, MarketLeader.com, RealEstate.com, USAToday.com and in "Chicago Agent" magazine, to name a few. When to Plant Sweet Potato Vine. The sweet potato produces vine-like stems that resemble the philodendron plant. Sweet potatoes and winter squash growing on an A-frame trellis (shown here at the end of June).