When the weather is still cold, dark and gloomy, it's hard to think about outdoor furniture. But as we all know the summer comes fast.   If you’re interested in upgrading your current patio set or you’re buying patio furniture for the first time, you’re probably looking for the best deals. And since patio furniture is generally a seasonal purchase, you might be wondering about the best time of year to buy furniture for your outdoor space.  Patio furniture is always in demand in the summer months. But if you wait to shop for patio furniture until the Fourth of...