How to Make Gourd Birdhouses | The Step-by-Step Process

A gourd birdhouse is made from a fully dried, hard-shell gourd cleaned out, drilled with correctly sized holes, and finished with an outdoor sealer only on the outside.

For the full breakdown, see our best Gourd Birdhouse guide.

Building a gourd birdhouse starts with a single non-negotiable: the gourd must be fully cured before you touch a drill. A fresh green gourd rots, not dries. The real work happens over months, not an afternoon. But once that shell is rock-hard and hollow, you’re about an hour of shop time away from a birdhouse that wrens, chickadees, and bluebirds will actually use. Here’s the exact process the sources agree on, from curing to hanging.

Curing the Gourd First

You cannot make a birdhouse from a freshly picked gourd. The gourd must be cured until it is completely dry, hard-shelled, and lightweight. This takes several weeks to months in a dry, well-ventilated area like a garage, breezeway, or covered porch. Mold on the outer skin during curing is normal — that’s the outer layer breaking down, not rot. Once the gourd feels light and seeds rattle inside when shaken, it’s ready.

Cleaning and Drilling the Shell

Start by cleaning the exterior. Scrape or scrub off the dried outer skin, mold, and debris; a stainless steel scouring pad works well for this. If the outer layer is stubborn, soak the gourd briefly in water to loosen it. After cleaning, mark your hole locations. The entrance hole goes on the side of the largest cavity, slightly above center. Drill the entrance hole using a hole saw, Forstner bit, or spade bit. The exact diameter matters — use a 1 1/8-inch bit for wrens and chickadees, or up to 1 1/2 inches for bluebirds and titmice. Drill two small holes near the top, opposite each other, for hanging. Drill 3 to 5 small drainage holes in the bottom.

After drilling, remove all seeds and pulp from inside the cavity through the entrance hole. Smooth every sharp edge around the entrance and other holes with sandpaper or a file. A tack cloth after sanding picks up dust before sealing.

Finishing and Sealing the Birdhouse

Seal the exterior only. Apply an outdoor-safe finish — clear acrylic sealer, spar varnish, or outdoor polyurethane — to the outside of the gourd. Do not coat the inside or heavily build up finish around the entrance hole; birds prefer a natural, uncoated interior. If using wire through the top hanging holes, run tubing over the wire where it contacts the gourd to prevent wear. Let the finish cure fully before hanging.

Hanging and Placement Tips

Hang the birdhouse 5 to 15 feet off the ground in a sheltered area away from heavy foot traffic and predators. A location with some shade and protection from wind helps the birds settle in. Check the house periodically for wasp nests or blockages — but only clean it out during the off-season when no birds are nesting.

Common Mistakes to Avoid

• Skipping the curing process — a fresh gourd will rot, not dry.
• Placing the entrance hole too low, which reduces usable interior space.
• Failing to add drainage holes, which traps water and ruins the nest.
• Leaving sharp edges around the entrance hole.
• Coating the inside with paint or finish.

A properly made gourd birdhouse lasts for several seasons with minimal upkeep. The key is patience during curing and precision with your hole sizes — get those two things right, and you’ll have happy tenants every spring.