Answer: HIBISCUS paramutabilis x syriacus is the botanical name of your 'Red Sentinel'. It produces large magenta flowers with a carmine eye. It blooms heavily until frost. The plants are hardy in your winter climate and can be planted outdoors. It's deciduous so the leaves will fall when the weather gets cold, but new leaves will develop in the spring. Provide full sun, well draining soil, and regular water during the growing season and your Red Sentinel should thrive.
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