Planting Tree Roses

I just received a new 24" tree rose of Mardi Gras yesterday from JP. I need to bring my tree roses in the garage for winter and therefore grow them in pots. They tend to always bend/lean over and I am wondering if there are better ideas on how to container grow them during the season?

I grow mine in pots also, and I stake them with rebar. I just hammer the rebar next to the pot and then tie the trunk to the pole. It works well.