The best way to overwinter your dracaena spike plant is to move it indoors in the cold months. If you already have it planted in a container, this is a very simple process. However, if it is planted in your garden, it will take a bit of extra effort and time. Find a container you want to pot your plant in and fill it with soil. Next, carefully and slowly dig up your plant and place it inside the pot. Always make sure your container has great drainage holes so your plant doesn't ever sit in water. It is best to place your plant somewhere that gets good indirect lighting throughout the day. Immediately after transplanting your plant, make sure to water with distilled water only. Always remember to keep your spike plant's water moist, but water sparingly throughout winter.