I have had a red trumpet vine for about 15 yrs. I have moved it from a pot to the front yard, to a side yard, to the back yard.( the same plant!) and its only been the last 4 yrs that its been flowering! and it grows now right next to a honeysuckle vine, sometimes the trumpet grows just overtop of the honeysuckle, but it never gets out of hand. Personally, I think the honeysuckle keeps it under control! and they all grow in heavy clay soil, in a raised box bed, along a fence. So far so good. I finally got my hands on some red and yellow pods from my cousin who has them growing up the side of a 30x30x10 ft tall(30 ft tall that is) chicken/peacock coop and it covers the coop-top to bottom/side to side! Beautifully! So I know this plant can get some serious growth height to it!