Have overwintered my 2 Mandevillas for 3 years, however last summer and the one before they did not do nearly as well as they did the first.

Should I pot thm up to a samller (2 gallon??) pot and bury that in the ground, or is a bigger pt better?

Also, right now, as last year, they have lots of new leggy growth, wifh very small leaves. Do I prune this back when I put outside? Help??? I would love a show like I had the first season I bought thme! Pink covered those vines all summer!!!