3. Stacked Terra Cotta Pot Shelter
Terra cotta is an underrated material for butterfly shelters. It breathes, it warms up quickly in the sun, and it ages into that soft, mossy patina gardeners love. This build uses two pots and a saucer.
Materials: one 8-inch terra cotta pot, one 6-inch pot, a matching saucer, three small cork or wood spacers, silicone adhesive, and a length of bark. Turn the large pot upside down and set the smaller pot on top of its base, using the spacers to create a ⅜-inch gap between them. That gap is the entry tunnel. Glue the pieces in place, then set the saucer on top as a roof.
Tuck a strip of bark into the gap so it extends inward, giving butterflies something to grip. Set the whole thing on a brick or stone pedestal rather than directly on soil, which keeps moisture from wicking up into the chamber.
Time: 30 minutes plus drying. Difficulty: beginner. This design looks at home in a cottage garden, and the cost is usually under ten dollars if you already have a chipped pot lying around.