will leaving my tree in the nursery pot for one season help thicken the trunk? Any tips for thickening trunks would be super helpful!

The more volume of soil the tree gets the faster it thickens.

The more foliage it have the faster it thickens.

More sun and fertilizer also helps.

Plant it in the ground.

[strike]Well, for a plant on the ground there isn't much you can do but wait... Fertilize like once every two or three months, may help, but on the ground trees tend to go for nutrients themselves...[/strike]

Oh, nevermind, I've misread the second response thinking it was the topic owner saying his plants are on the ground... xD