Ulla Bisgaard wrote:Why can’t you grow sweet potatoes in the same spot? We are in grow zone 10b, and treat the sweet potatoes as a self seeding crop.
I have grown mine in the same two raised beds for 6 years. I do a 2 year cycle for harvests. Let’s call my beds an and b.
The first year I only harvest from bed A, but leave the smaller sweet potatoes in the soil. Then I plant beets, parsnips and leeks to grow during the cold season. Once springs come around, the small sweet potatoes I left, starts sprouting and puts out leaves. At this point I harvest the beets, but leave the leeks, as they deters the wildlife from eating the sweet potatoes.
The first year, I don’t harvest bed B. I just leave it alone until fall of the second year. The second year I harvest, but again leave the smallest of the sweet potatoes in the soil. The sweet potatoes have grown huge at this point, with many tubers at 5 pounds each. After the harvest, I grow beets, diakon radishes and leeks for the cold season, until spring, when the small sweet potatoes set out leaves.
Using this method produces a lot of large sweet potatoes and other crops, without me having to deal with starting sweet potato slips every year. It also gives us access to sweet potato leaves all year round, though I never harvest more than 20%, since anything more will stunt the growth of the sweet potatoes.
I do top off the beds after harvesting, with compost, rabbit pellets, phosphorus and potassium.
This is brilliant, Ulla! Now, I'm wondering if there's a way I could do something similar, though in 6b, I'd have to do a very heavy layer of compost, to keep it warm enough, I think...