You are going to have to grow bluebonnets as a spring-planted annual in New England because bluebonnet plants freeze at 10 degrees F. You should use fast-sprouting, acid-scarifed bluebonnet seed from Wildseed Farms and plant as soon as you can in the spring. If you have a greenhouse, you can start transplants in the greenhouse at least eight weeks before you intend to put them in the garden and after the danger of temperatures in the 20s have passed. You cannot expect successful reseeding because of the harshness of the winter weather.
For more information on the bluebonnet and its culture, visit the Web site listed below. Seed can be ordered from Wildseed Farms whose Web site is listed second. The bluebonnet seed are at the third site listed.
http://aggie-horticulture.tamu.edu/plantanswers/flowers/bluebonnet/bluebonnetstory.html
