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It's important to consider the entire display as well, even if this is your backyard, or a single traditional display, or a shohin stand.
A strong blue accent can serve as opposition on the color wheel, then you can pair your tree more closely in color to it's pot.
Something like a flowering bush in the yard, siding color, fence, etc may determine the best use of things of only to be enjoyed at home.
With all the excellent information above, the farther you dive into particular details, the more enjoyment you'll always get out of it.
I think the most important question is, will it be the standout in a shohin box? Then you'll use rules a little more loosely, but in context of many other aspects.
If it will be solo, there will be less context to play off of, so "mistakes" or "broken rules" may be to uncomfortable to enjoy.
Sorce