Growing sweet potatoes is so easy. Unlike regular potatoes no hilling is required. Sweet potatoes grow great in containers but an old wheelbarrow is perfect. Here is how I grow sweet potatoes in my backyard garden and organic ones too.
This old wheelbarrow was used by my father during his many years as a mason. We drilled a few holes for drainage and filled with potting soil with some sand mixed in. Sweet potatoes do not need rich soil and it needs to drain well. They are a tropical plant so grow during summer. If some potatoes do peak through just mulch or hill over with soil.
You can plant a few organic sweet potatoes right in the soil or start slips from one like I did. Take a sweet potato and place in a jar with water, potato pointy side up. Shoots with leaves will start to grow and when they are a few inches pull them off and strip a few leaves off at the bottom and put the slips in a clear jar in water in a sunny window.
When to harvest your sweet potato plants:
Sweet potato plants will keep growing as long as the weather stays warm. This is the benefit of a wheelbarrow if you live in an area with early frosts. You can wheel the plant into your garage at night.
If you have a long growing season like me, you can just keep checking the plants and harvest when the potatoes are a good size for harvest, usually September to October.
Dig sweet potatoes on a dry day and let them sit outside for a few hours in the shade to dry. They should cure in your garage or on your porch, ideally in 80-85 degrees for about two week. You want to keep them from getting damp but allowing any marks or wounds to heal up. Cook any damaged sweet potatoes right away. Time to try all those recipes you have saved for your organic homegrown crop of sweet potatoes.
Update 1/2016: I had so many sweet potato slips that I planted some in our planters out front. They made a nice ground cover all summer and I have harvested over 25 pounds so far and still have two plants to dig up. Be very careful when digging that you do not use a fork or shovel and puncture your sweet potatoes. I did that to one. Hand dig if you can.
Also, as for curing; dig and dry out on your lawn or in the sun. Don't rub wet dirt off cause it will scar the newly dug sweet potatoes. You can rub them off when totally dry. We have been enjoying the best tasting organic sweet potatoes ever!