Q.Do I need to repot a New Guinea Impatiens
It looks beautiful in its original pot. Should I repot my new guinea impatiens in a larger container (wash tub)? It’s in a 10-inch pot and is beautiful in it.
I have read that the recommendation is to plant new guinea impatiens in a pot that is 1.5 times the diameter of the pot it was originally purchased in. Which means, in your case, you would want to re-pot it in a 14-16" pot. The reason for upgrading the size is to allow your new guinea room to grow. Your new guinea may be thriving in the space it is in now for the size it is now but its size will surely change as will its space requirements as time goes on.