I love Snapdragons and Dahlias which grow tall and have beautiful color!

Purple Fontaingrass is my go-to for annual containers. I mix them with flowers and vines for other interest. Last year, I did this one ... periwinkles and potato vine with the grass:

The possibilities are many, browse around a nursery and see what catches your eye. Any grass would be fine (although I wouldn't do Pampas grass).

The old adage for ornamental container growing is "thrill, spill and fill." This is not a hard and fast rule, but more of a time tested guideline. That still leaves you with a staggering number of options.

I've got nothing to offer regarding ornamental grasses as they aren't my thing, but MizGG [z8a] is really bringing it on in her pic! I'd probably use an ornamental grass element as the fill, but that's just my humble opinion. Be that as it may, get on down to your local independent nursery and see what they have to offer.

I like to use plants that attract hummingbirds. You get to see the beautiful flowers, and one of the most interesting birds too!

Salvia Guaranitica 'Black and Blue', Salvia Coccanea 'Lady in Red', Cuphea 'David Verity' and Proven Winners 'Vermillionaire', some kinds of Agastache (A. cana or A. rupestris)

If you like edibles my berry salad pot is cute.

Hope you can see everything.

Sweet peas and runner bean are climbing up the blueberry bush. Vintage lettuce in different colors underneath. Mini pickwick runner beans spilling over in back of red lettuce. Chervil is the parsley type leaves peeking out here and there. Blueberry bush provides the mainstay of the pot.

The beans and peas haven't flowered yet. The chervil has light baby breath like flowers yearly. Of course the blueberry will cover itself in pretty berries.

Hummingbird, butterfly, bees and birds will come. Cupani sweet pea will perfume the air. Side benefits are fresh herbs, salad, and blueberry leaf tea.

This is one months growth so blueberry might hit 3 to 5 foot before winter. Chervil will take any space that comes available. Space master cucumber and tom thumb tomatoes will spill out in summer heat replaceing peas and runners.

It's an easy pot to make. Put a dormant blueberry in the center, poke some bean, peas, dwarf tomato, and dwarf cucumber seed into the soil. Plant chervil in shade of blueberry and lettuce underneath. Float in rainbarrow.

You can see nasturtium peeking out of my mini rose garden pot in the background. I love orange flowers. Our local pineapple weed and Colts foot are the yellow flowers.

Far right is pineapple, mini rose and utah pomegranate.