Answer: Do you plan on taking the pots indoors for the winter or leaving them out? If outdoors you want something that will survive without cracking and pots should always have a drainage hole. Generally, use a pot one size up from the pot they are currently growing in. The tendency is to put plants in a "really big pot" to allow them to grow into it, but this isn't good for the root system, as there is too much soil to keep appropriately moist. It looks kind of silly, too! Wisteria aren't too fussy about soil type. Any good quality potting soil will be fine. You might want to mix in a slow-release fertilizer at the time of planting. Good luck!
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