I repotted a mid-sized Chinese quince clump today. I acquired it as one of a flat of seedlings at an International Bonsai Symposium in about 2001. Not sure how I got it back to Spokane along with the two pines I did in workshops, but my guess is creative boxing for shipment as checked luggage.
It was grown in various pots for several years and eventually planted in the ground over a plastic dinner plate in a about 2012 with one lift a rotate to keep the roots compact. It was lifted and potted in a 17"square x 5" (43 x 13 cm) deep grow box (all dimensions are inside) in the spring of 2018 using pumice and diatomaceous earth. It grew decently and had quite a few fine roots when pulled it out of the box this morning.
My original plan was to pot it in a 15" x 10.5" x 3.5" (38 x 27 x 9 cm) window rectangle, but that was clearly too small. Plan B was the 18" x 14" x 3.2" (46 x 36 x 8 cm) oval shown in the picture below… However to get this picture I had to place a small 1.5" (4 cm) deep oval under the tree to bring it up to a decent level so the pot was clearly too deep even though the size was decent… This was after I had fully prepped the pot for planting including a small mound of soil.
I hunted through my pots and found a 20" x 14.5" x 1.8" (51 x 37 x 4.6 cm) oval that is shown below and the tree only had to be propped up a little on the right side.
I further pruned a couple of the roots on the left that turned over the edge of the plate and potted it up as you see below.
The main trunk in the front is a bit long a straight - I hope it buds out a bit lower. There is a dead stub sticking up in the middle that will be trimmed back once the tree is growing well. There is also trunk on the left that comes out at a decent angle and then heads straight up as shown below. My initial inclination is to cut it off, but remembering a comment by someone in a Live Stream that Ryan will almost always buy the tree with a funky branch, I think I will incorporate it into the design.
I plan to air layer off some of the branches to shorten them once it starts to grow. I will also look to make a slightly smaller, but similar glazed oval for the repot in 2 or 3 years and perhaps pot left of center vs. right of center. Leaning towards an off white with vertical brownish streaking, but am open to suggestions on the pot.