question re: planting in pots in ground
In another thread Teresa (crdahlia z8bWA) said:
"Another thing you can do to insure a tuber the following year is plant the tuber in a pot and then sink the pot in the ground. You will get a normal sized plant and blooms. Then, when the season is over, dig the pot and store pot and all where it won't freeze. When the tuber sprouts, you can separate into several pieces, or take cuttings. But that is another whole subject."
I am very interested in trying this, and have a couple of questions: (1) what size pot? (2) one or more holes in the bottom of the pot? (3) what kind of soil do you use in the pot? (4) how do you fertilize?