Answer: Good soil preparation will help your plants survive your severe conditions. Add lots of organic matter -- compost, well-rotted manure, grass clippings, shredded leaves, etc. -- when you prepare your beds. Some good, hardy plants suitable for your region are: Spring: False Indigo Gayfeather Lupine/Texas bluebonnet Summer: Yarrow Daylilies Evening Primrose Summer-Fall: Michaelmas Daisy Purple Coneflower Black-eyed Susan Greenhouse-grown freesias thrive best where nighttime temperatures are around 50 degrees, and daytime temperatures are around 60 degrees. You may be able to find some varieties that are adapted to growing outdoors, but it's doubtful they would thrive with your severe conditions.
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