Answer: Usually western or southwestern exposures are the tough ones. Soil temperatures can really heat up in containers. One trick you might try is placing the planted container inside a larger container, filling the space in between with crumpled newspaper or styrofoam peanuts as an insulator. Warm-season annuals that take heat and sun include sunflowers, zinnia, cosmos, gaillardia, petunia, salvia, vinca, tithonia, black-eyed Susan, portulaca, celosia, globe amaranth, verbena, four o?clock, and lisianthus.
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