Sweet potatoes do cascade and would look lovely in that (they do sell ornamental sweet potato vines for decorative planters, but the roots - though edible - wouldn't taste as good as the ones grown for food). You would have to have enough room in the planter for the tubers to grow. Other than that, you could try some vining crops like cucumbers and squash (these are heavy feeders so you have to make sure you have plenty of compost in the planters to start with, and to continue to feed them throughout the season. You can top dress the container with more compost If there isn't room in the planter for any more soil, then you can make a compost "tea" by soaking the compost in water for a day or more, then pouring off the water and using it to feed the plants. I also save my egg cooking water (from hard boiled eggs) and use that instead of plain water to water my planters - adds plenty of minerals.
Strawberries will send out runners which you can just allow to grow off the sides. In winter it would be best to move the planter to a sheltered spot of the garden or flower beds and cover it with straw, so the plants aren't harmed by the cold. In the spring you can move it back.
Edited by: CBRINKLEY401 at: 11/29/2012 (14:18)
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