If you are hanging them inside your pergola you will want something good for shade or part shade. If they are going to be shaded during the midday heat then Impatiens or begonias are what you want. Angel wings begonia make a beautiful hanging basket that blooms all summer.

If there is more sun you might try wave petunias or million bells. Both put on a good show and are profuse bloomers

There are many shade or partial shade loving plants to use in a gazebo or pergola. The above are good suggestions but I'll give you a few more. Think a little about the falling spent blooms. A plant shedding profusely can even be slippery underfoot.

Coleus makes a bright, full basket for shade with no blooms for instance. Browallia does well too. Both can be seed started. Ivies or many foliage plants you'd use indoors if you want to take slips from them. Most folks can start them even in water. Fuschias or bacopa do well in partial shade. Illumination begonias are drop dead gorgeous. You can seed start them, but it's not for the faint of heart. Many begonias (like non-stop or reiger) can be started from purchased tubers rather inexpensively.

Dorotheanthus bellidiformis in full sun, Viola "friolina" in Pelargonium peltatum in partial shade/full sun..

check out the link .. might even make me want to mess with pots... lol

ken

Here is a link that might be useful: 3rd pic top row .. in my browser

Thanks for all the suggestions. It helps me a lot! :)