There are lots of beautiful and easy to grow flowering vines that grow well in containers. To get the most out of a vining plant, you will need a trellis. You can buy one or make one yourself. One of the easiest that I use often is also one of the least formal. I simply stick branches into the soil, creating a trellis.
I also often use vining plants in containers that are placed against a wall to which I've attached a trellis.
1. Passion Flower
Passion flowers Passiflora incarnata)are possibly my all time favorite flowering vine. The flowers are just so stunning and impossible looking. A little like a cross between a flower and a space ship. They range in color from red to white, blue and purple. Many of the vines can grow 15-30 feet and they grow very quickly, grabbing onto trellising with thin tendrils.
Preferring full sun, most will tolerate partial shade. Passion flowers require very good drainage and are heavy feeders so need regular fertilizing during the growing season. Depending on the variety, these tropical plants will need to be brought inside during winter in colder climates.
Passion flowers will flower all season, though each blossom only lasts about a day. The foliage is beautiful to. Prune to keep a reasonable size and make sure your trellising is thin enough for the tendrils to grab on to.
Invasive in some areas, contact a local extension office to check if you should grow them at all
2. Morning Glory
There is something so old-fashioned yet oddly contemporary about morning glories these rate right up there with my favorite plants--I can't imagine not growing them. Easy to grow with heart-shaped leaves and abundant and luminous flowers, morning glories are perfect for containers.
Easy to grow from seed, morning glories come is many colors, from white to pink, blue, red and deep purple. They prefer full sun but will grow in partial shade. The vines will reach 5-15 feet, depending on the variety, so will appreciate a tall trellis.
My favorite varieties are 'Grandpa Otts' and 'Heavenly Blue.'
For more information:Growing Morning Glories
Related to the morning glory, cardinal vines are also beautiful and will flower during the daytime and fold up shop in the evening. The 2" cardinal red flowers are glorious, but the real show stopper of this plant is the fern-like leaves, which are both interesting and elegant.
3. Black Eyed Susan Vine
Black-eyed Susan vines rock. They are easy to grow, cheerful, look great and flower all summer long. There are several colors ranging from salmons to bright oranges, yellows and white. Growing from 5-10 feet. Prefers full sun and well-draining soil and will need to be fertilized during the growing season.
I like Black-eyed Susan vines particularly in tall narrow pots with a rustic trellis. I've also seen them in hanging baskets. They sprawl like crazy, sometimes needing some assistance to grow up a trellis.
You can mix different varieties, the orange and yellow, or orange yellow and white combined are very popular.More on Black-Eyed Susan Vine Growing a Moon Garden
4. Moon Flower
Moon flower looks similar to a morning glory, but it is quite the opposite, blooming only at night. The large white flowers unfurl after the sun sets or on cloudy days.
Preferring full sun, in some areas they will tolerate partial shade. Like morning glories, be careful not to over-fertilize. These plants are somewhat drought tolerant and do not need super-rich soil.
5. Mandevilla or Dipladenia
While it is often thought that Mandevillas and dipladenias are the same plant, it turns out that dipladenia is a member of the mandevilla family and is a somewhat shorter and shrubbier plant. However both are hugely popular and widely available and you care for both the same way.
The flowers of dipladenia and mandevilla are beautiful and pinwheel-like. The plants are super fast growing and flower profusely for the whole growing season. The leaves are shiny green and lovely as well.
Preferring in full sun, most will tolerate some shade. While they will tolerate some dryness, they prefer consistently moist soil.
In colder areas you can bring them in during the winter, keeping them on the dry side and bringing them outside again once they temperatures reach 50 °F.More On Growing Dipladenia and Mandevilla