Oh that light is not a that close. I seldom repot once they are adult plants and in at least a 8 inch pot. Many times only 6 inch.
I know a woman who plants one single plant in a mason jar so she can see if it is dry. No drainage. I had an old one in a container with no drainage and it lived for over 10 years in the same pot, but this year I over watered and it is now in the GH waiting to see if it is going to die or survive. Did not remove it from the pot.
Honestly Gita, these plants are so hard to kill, you can put them almost in any container as long as you do not over fertilize or water.
I do add new soil to the top at times if they begin to look scraggly. This year has been a nasty year for plants of all kinds.
Do you remember me selling black pussy willow? I bought two plants many years ago and must have sold dozens of cuttings and plants over the years. I had my SIL dig out five of the oldest ones this year. I kept two of the black ones and I now only have one white, one pink and of course the two black. I saw this year that Logees was selling the three as a group or individually for something like $14 for a 4" pot. Amazing it took them so long to find them. They were good sellers. I didn't know if I had ever sent you any of those or not. Gotta go. Nite.