Dan this is where the your soil will make all the difference.
It is very fashionable to use Japanese clay subsoils, in some circles. They simply will not stand up to immersion or frost (not an issue for this tree). Many will also use kaolin products "Oilz Dri". Exactly the same problems abound as this soil will break down if immersed.
I would use a chop stick in the pot(s) that dry out quickest. I would check by touch those chopsticks for dryness. And top water liberally when the chopstick is dry. If your trees are indoors letting them drip-out on a drain board works if you only have a few trees.
Think like a tree
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