Just because the weather is cooler doesn't mean you have to give up your dreams of a garden! We love this idea of topping a mantel with a piece of plywood and populating it with cacti in terra-cotta pots. The effect is halfway between a desert-scape and an art installation, but it soothes our itchy green thumbs. Cacti are a good choice for this project, since they are hardier than many other plants. But be sure to keep an eye on their water levels — proximity to the fire will make them dry out quicker! Pick up a variety of terra-cotta pots and differently shaped cacti, and you have an easy DIY that will bring a little of the outdoors in this Winter!