One of my favorite clematis vines is Clematis florida sieboldiana (the flower is similar to a Passion Flower Vine). It’s the perfect climbing vine for a container, because of its delicate nature. I use this one in container gardens with a trellis structure for support. Blooms appear in June, with a few sporadic flowers appearing throughout the summer. Because clematis vines are deer resistant, they are an obvious choice for gardeners with wildlife issues. Hardy to Zone 7B.