A Second Growing Season?

My younger sister and her family live in Georgia, in the country about an hour south of Atlanta. They have two growing seasons there; the first one begins in March and the second one in July or August. Imagine! Twice the opportunities to grow tomatoes and peas and zucchini and pumpkins (is that why American Thanksgiving falls in late November?).
We may be catching up here in northern Nova Scotia. When we can let the chickens out of their fenced pen to roam around our one-acre yard, it means it's time to clear the annuals out of the flower gardens. Yet many of my annuals - sunflowers and zinnias excepted - were still in bloom. They seemed worn out, likely tired of coping with the temperature extremes of warm days and cold nights, or perhaps they are simply weary of treading water after all the rain we've had, but they are still in bloom. In fact, my osteopernum were not merely in bloom - they were reblooming. The plants looked so strong and healthy, you would have would have sworn it was July. I didn't have the heart to rip them out of the ground.
Here's the thing: although I believe in global warming and know it's humans paving the ground and spewing poisons into the water and atmosphere that has caused it, it's tempting to enjoy the prospect of a second growing season. Think of all the hard work that goes into creating and maintaining flower gardens (as well as vegetable gardens but those are my husband's domain); if those gardens could last two months later, that's more time to take pleasure in the sights. If that's the case, however, I'm going to have to plant more late-season bloomers like asters, helenium, and sedum.
And perhaps if we can offer a second growing season -- and no cockroaches -- I'll be able to convince my sister and her husband and their four kids that northern Nova Scotia is as good a place to live as southern Georgia.