fall planting and raised beds.

"Crops that will definitely ripen before frost without extra precautions: scallions, peas (don’t delay in planting), beets, chard, spinach, and hardy greens.

Crops that MIGHT make it (with some frost protection and encouragement by using something like “floating row cover” or sheets to protect against cold snaps): beans, summer squash, pickling cucumbers, and small carrots." 

From UMaine cooperative extension.

Raised Beds---from UMaine cooperative.  some good ideas for hooping and trellising as well.