Since 2-3 months isn't a long enough season to grow anything except lettuce, that's exactly what we do here in Canada! Otherwise we would not be able to grow tomatoes, squash, cucumbers, peppers, and so on. Basically anything that has to flower and produce a fruit. We can grow herbs and other quick leafy greens without starting them indoors. :)
Do you start anything indoors? It's not a very efficient way to do things, but sometimes it's a must.