I have grown Charlotte potatoes for Xmas for a number of years with great success. They are a disease free waxy variety which is excellent to eat.
I have grown Charlotte very successfully in bags and raised beds for Christmas harvest. However, I would suggest that the bag method is preferable as it allows the crop to be moved into the greenhouse when the weather declines. Charlotte is a fine potato but can boil down if allowed to get too large. This is more of a problem with spring planting when the crop is left in the ground too long. Late summer /autumn planting usually does not produce very large tubers making Charlotte my preferred choice.