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Great article, but Calendulas do tolerate frost rather well for an annual. On my plant blog (geraniosgarden.blogspot.com) I have pics of calendulas blooming in New York during an unusual mild spell in early Jan 07 in New York. Not typical to see them blooming in January, I must admit, but they did go thru some frosts during the previous Dec. They were finished off when the cold got into the teens and lower twenties on a sustained basis soon afterwards.
We had them in the Herb Garden at Kanapaha Botanical Gardens and they have survived frosts this Winter of 19, 25 and 28 degrees. They are currently at peak flowering. We typically remove them when very warm weather arrives so I am very interested in the idea of cutting them back for Fall rebloom. How far would you cut them back?
