To create a frog-friendly garden focus on providing a cool, moist, and protected habitat with a permanent, clean water source, native plants, and shelter, while avoiding chemicals and predators.
Key Components
- A safe water source (pond): This is essential for breeding and hydration.
- Location: Choose a spot that gets morning sun but is shaded during the hottest part of the day (around 50-75% shade is ideal). Place it away from house windows, as calling frogs can be loud at night.
- Design: Vary the depth, with a deep end of at least 50 cm to keep the water cool in summer and shallow, sloping edges for easy entry and exit. Use a non-metal container, plastic pond liner, or an old bathtub sealed with silicone.
- Water Quality: Fill the pond with rainwater if possible. If using tap water, let it stand in an open container for 5–7 days to allow the chlorine to dissipate. Never use fertilisers or pesticides near the pond.
- Mosquito Control: To manage mosquito larvae, you can install a small water pump to gently break the surface tension, or introduce a few small native fish like Pacific Blue-eyes, which will eat the larvae without decimating all the frog eggs and tadpoles.
- Shelter and Habitat: Frogs need places to hide from predators and harsh sunlight.
- Ground Cover: Use thick leaf litter, logs, branches, rocks, and upturned flower pots for hiding spots. Allow some wild, mulched areas to develop in your garden.
- Multi-layered Planting: Incorporate ground covers, grasses, shrubs, and small trees to provide shade and protection. This diverse structure also attracts insects for food.
- Minimize light pollution: Turn off bright outdoor lights at night, as they can disrupt a frog’s hunting and resting.
- Native Plants:
- Pond Edges/Bog Areas: Lomandra longifolia (Mat Rush), Carex spp. (Sedges), Juncus usitatus (Common Rush), Viola hederacea (Native Violet), Alpinia caerulea (Native Ginger).
- Submerged/Deep Water: Marsilea spp. (Nardoo), Villarsia exaltata (Marsh Flower), Baumea articulata (Jointed Twig-rush).
- Surrounding Garden: Acmena smithii (Lilly Pilly), Callistemon spp. (Bottlebrush), Grevillea spp., and Banksia spp. help attract insects and provide additional cover.
- Local text: The Range and Hinterland Gardening book is a current and useful resource.
- Pest and Predator Management:
- Chemical-Free Zone: Frogs absorb water and chemicals through their sensitive skin, so strictly avoid all pesticides, herbicides, and fertilisers in and around your frog habitat.
- Pets: Keep cats and dogs away from the frog area, as they are significant predators.
- Cane Toads: If you have cane toads, make your pond edges at least 50 cm high or use dense, spiky plants like Lomandra as a barrier to deter them from entering the water to breed. Learn to identify and humanely remove cane toad eggs (long, stringy strands) from the water.
Final Note
Be patient. If you build the right habitat, local frogs will find it on their own. Never introduce frogs or tadpoles from other areas, as this can spread disease. You can use the FrogID app to identify which species live in your area and record your sightings.
https://www.museum.qld.gov.au/learn-and-discover/apps/frogid-app