There is a strong possibility of the dreaded first frost tonight in Boston suburbs. Plants that survive a cold night can carry on for weeks, so it's worthwhile to try to protect your tenderer vegetables, annuals, herbs and flowering bulbs by covering them with a bedsheet over night. Plants most affected by frost include impatiens, dahlias, summer vegetables such as tomato plants and summer squash.
Harvest vegetables and flowers that are almost fully developed, but leave green vegetables and flower buds with hopes that your plants will survive the frost. Many annuals such as snapdragons, nicotiana and marigolds are frost resistant and so are most cool weather vegetables such as winter squash, broccoli, lettuce and carrots and other vegetables that grow underground. Roses are fine with light early frosts, and so are most herbs. The exception is basil, so cut leaves and bring them indoors tonight. Or bring entire plants indoors, along with any tropical plants you want to try to save.