I haven’t tried planting containers because I am not able to water them regularly. This summer, however, I would like to try a couple. Can you suggest some groupings of annuals that look good together and like to be on the dry side?

There are several varieties that can thrive in drought conditions. Try a few simple things to help insure success. Try to use large containers over 14 inches wide. More soil in the pot means a longer time between waterings. You can also add water-retaining crystals to your soil, which will help retain moisture and release it as needed (Soil Moist is one brand). Here is a list of annuals that are not only drought tolerant, but are compatible also: wax begonia (upright), Portulaca (trailing), blue Victoria salvia (upright), vinca vine (trailing), spike (upright), Dianthus (upright), English ivy (trailing), Nierembergia (trailing), Gomphrena (upright), Gazania (upright).