Hi,
I started some root suckers in august directly in the ground in an 80 Liters plastic trashcan with bottom removed.
They lost their leaves, and made new ones with new growth .
Half of that new growth did die back, but I saw buds starting to open on the stems - that is what you should look for .
Now, I need to water them to help them - but for 3 weeks we had no rain, and the tap water is still cut for the winter-time .
If yours are still in the basement, and you have no frost outside, take them out to an half shaded area for a week or two and then to their final place.