Answer: Four O'Clocks only open their flower in late afternoon and close the following morning. They grow to 1-3 feet tall, are a perennial in warmer areas and flowers come in white, pink, red, yellow and striped colors. You'll need to start yours indoors 6-8 weeks before your last frost and place them out in beds after danger of frost has passed. They like sunny locations, well drained soil and they form tubers which can be dug and stored like dahlias for next year's growth. Unless dug and stored they will die in fall in Canada from the cold.
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