Heat Resistant Annuals For High Altitude - Knowledgebase Question

Gunnison, CO
Avatar for lazorch
Question by lazorch
May 23, 2002
Last year I set a planter with geraniums and lobelia by our front porch. They looked as if they were too hot (even in our cool climate) and failed to grow, even though I have had great sucess with this combination in other planters elsewhere in the yard. I can only assume that the location (southeast corner of our East facing porch in a corner formed by the deck and the adjoining steps) was too hot. Can you suggest a combination that might work?

Answer from NGA
May 23, 2002
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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