How to Build a Rubber Liner Frog Enclosure

Select an area of your yard for the frog enclosure. Locate your enclosure on a flat patch of ground, preferably one with partial shade during the hot summer months.

Mark the corners of your enclosure using a tape measure and surveying stakes. When deciding on a size for your enclosure, remember that bigger is better. Frogs locate ponds by seeing reflective surfaces; if your enclosure is too small, frogs might not even know it's there.

Dig a pit for your enclosure with a shovel or spade. Dig 1 foot deep, using your corner markers as guides.

Level the bottom of the pit with a gardening rake. Remove any rocks, twigs or sharp objects from the pit, as these could puncture your liner and ruin your frog enclosure.

Lay a row of cinder blocks inside the entire perimeter of the pit. Use a level to check your work.

Spread a layer of rubber pond liner across the bottom of the enclosure. Press the liner against the bottom and cinder block sides of the pit until it lays flat. Bring the edges of the liner up and over the cinder blocks and tuck it in.

Secure the blocks and rubber liner by filling in with dirt between the edges of the pit and the cinder blocks. Tamp the dirt down firmly with a shovel.

Place a layer of flat capstones around the edge of the enclosure. Flagstone, slate or garden pavers all make excellent capstones.

Fill your frog enclosure with water. If you fill from a residential water supply, be sure to use a commercially available water dechlorinator, following the manufacturer's instructions.

Make your frog enclosure more inviting by adding water plants, rocks and water features. Frogs look for breeding areas with places for tadpoles and young frogs to hide. Providing adequate cover is essential to maintaining a healthy frog population. Place small piles of rock along the edges of the pond to provide hiding spots for adult frogs.