I moved my sweet potato cuttings from the garage to the windowsill where it's warmer, despite the risk of a kitty deciding it would be fun to knock them off. They didn't seem to be doing well in the chilly garage. I could also try growing slips from the roots I still have and see which method is easier.
This is also why, when growing regular potatoes, you can eat the biggest ones and save the smallest ones to replant. Theoretically, the small ones and big ones of the same variety should all be genetically identical.
They're also getting sweeter in storage. I really wonder why cushaw squash seem to have such a bad reputation. For example, the Seed Savers Exchange public catalog only carries one variety, Tennessee Sweet Potato, and it says it has poor eating quality and is best used for decorations. Sandhill Preservation Center has a similar opinion. Even though they carry more varieties, they say they are best used as livestock feed.
The ones I've grown do have a very stringy texture, especially compared to butternut or acorn squash. This might be off-putting if your recipe calls for cubes of squash, but the stringiness doesn't matter if the squash is pureed, like for baked goods. Aside from the texture thing, the last squash I cut open, roasted and pureed was quite sweet in flavor, and had a rich orange color to the flesh. Not at all pale and bland like I've seen cushaws described.
I wonder if it's a climate thing. Weirdly enough, most seed companies are based up north. Maybe a cushaw grown in the Midwest or Northeast doesn't have enough heat or a long enough growing season to develop to its full potential. This is probably a good example of why you should keep climate in mind when reading other people's opinions on plant varieties.
Anyway, I'm sold on cushaws now and plan on trying some more varieties in the future. Maybe there are some out there that are less stringy, which is really my only complaint (if I leave out the complaint that they're too productive, which isn't really something worth complaining about).