You'd only want to increase your pot size by about 1/3rd all around (1/3rd deeper, 1/3rd larger to the sides) . . . if you get a too much bigger container, your plant will spend a lot of time and energy growing roots and your foliage/bud growth will really slow down until the new roots expand. I've seen a lot of thriving plants get transplanted into way too big containers, and stop growing. They generally start again, but time is lost.

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Rule #2 . . . Learn to clone . . .