For those of you who have 4 seasons in your climate like I do here, is it best to buy your orchids from March through September or October? The winter is cloudy and dull here so is it better to wait than to bring an orchid into dormant conditions?

Maybe it doesn't matter as much for Phals and Paphs? Or maybe it doesn't matter at all and you all buy orchids all year?? Of course that would mean shipping with heat packs when ordering on-line?