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More about our AI transparencyA broken flowerpot can offer amphibians a refuge in the garden. Find out how to combine cavities, leaves and frost protection sensibly.
An upside-down flowerpot with an entrance at the side, combined with leaves, stones and loose soil, can create a small refuge for amphibians. The pot alone is not what matters: the gaps must remain accessible, be protected from frost and not stay flooded. This kind of shelter can complement what a garden offers, but it does not guarantee that animals will use it or overwinter in it.
Amphibians need more than a pond in the garden. Common toads, frogs and newts spend much of their lives on land. There, they look for sheltered places to rest and hide; some may also use suitable cavities as winter quarters. These can include, for example, cracks in the ground, spaces among roots and gaps in piles of stones. BUND Naturschutz in Bayern describes such frost-free refuges as potential shelters for amphibians.
A broken terracotta pot can serve a second purpose in this context: instead of being planted up, it creates a cavity. If it is positioned so that animals can get in and out again, it can be combined with loose materials to make a small “amphibian castle”. For example, Froglife describes upside-down plant pots with a side entrance as simple hiding places, known as “toad homes”.
This is not an artificial home that will reliably attract an animal. It is an additional option in a garden where suitable conditions are present. A single pot is no substitute for suitable habitat or for the other refuges an animal might use as it moves through the garden.
Amphibians are ectothermic: their body temperature depends largely on their surroundings. In winter, they greatly reduce their activity and seek sheltered places to retreat to. BUND Naturschutz in Bayern says that amphibians living on land may look for frost-free cavities in autumn. The organisation gives November to March as the period of winter dormancy, although the actual timing depends on the weather and local conditions.
Their skin matters too. It is thin and permeable, plays a role in water balance and can be used for breathing. Amphibians are therefore vulnerable to drying out. A refuge should not simply be as dry as possible. At the same time, a cavity that stays flooded is not a good winter quarter: guidance from Amphibian and Reptile Conservation identifies frost protection and protection from flooding as important requirements for winter refuges.
So a helpful space is one that stays moist without water constantly collecting inside it. Leaves and other loose organic material can retain moisture. LBV Weißenburg-Gunzenhausen describes leaves and leaf litter in a larger toad cellar as a moisture reservoir. This indicates what the material can do, but does not tell us how much leaf litter should go into an individual pot.
You do not need new building materials for a small amphibian castle. Clean materials already in the garden may be enough. The important thing is to combine them so that accessible gaps remain and the structure does not become a tightly packed block.
| Material or structure | Possible function | What to bear in mind |
|---|---|---|
| Upside-down terracotta pot | Creates a sheltered cavity; Froglife describes pots with a side entrance as a possible hiding place. | An animal must be able to get in and out again. A completely sealed pot does not provide an accessible refuge. |
| Stones or old paving slabs | Create gaps and sheltered nooks. | Arrange them loosely and securely rather than filling every gap with soil. Cavities are an important feature of winter refuges. |
| Leaves and leaf litter | Can retain moisture inside and line the cavity. | Add them loosely. Do not pack them in so tightly that possible entrances and gaps disappear. |
| Soil and existing ground | Cover the structure and help it blend into its surroundings. | The site must not become a hollow that stays flooded. Whether adding sand is useful depends on the soil; the sources do not support a one-size-fits-all recipe. |
| Twigs and dead wood | Add cover and create further features in the garden. | Lay them loosely and do not block access to the structure below. |
The table describes possible functions, not guaranteed results. In particular, the information about leaves, stones and dead wood draws on general recommendations for refuges and larger hibernacula—the term for artificially created winter quarters. It should not be treated as a tested construction guide for every pot size.
Look for a quiet place where the ground is not regularly flooded. A cavity that stays wet does not serve the purpose. At the same time, the surrounding area should not dry out completely. An existing bed with leaves, plants and other hiding places may be more suitable than an isolated, exposed spot. The sources do not specify an ideal aspect or fixed distances, so take the conditions in your garden into account.
Loosen the soil where you plan to build the structure. Avoid digging a deep hole if you cannot tell whether water will collect in it. A single upside-down pot does not automatically need to be as large as a major toad cellar: LBV describes a much larger, excavated structure for its toad cellar. Those dimensions cannot simply be applied to a small pot refuge.
Sand is not essential. Sand was incorporated into one described garden structure, but that does not mean sand will make every garden soil more free-draining. The key is to prevent water from remaining in the cavities. If you cannot assess how well your soil drains, keep the intervention small and start by using existing natural features.
Position the broken pot so that it creates a cavity while leaving an entrance open. Froglife describes a side entrance in an upside-down pot as a practical option. If needed, add a few stones or paving slabs you already have, arranged to create further gaps. Keep the spaces accessible; a pot packed tightly with soil is not an accessible refuge.
Place a little dry or existing leaf litter loosely inside the cavity. Froglife recommends leaves or grass for simple toad refuges; LBV mentions leaves and leaf litter as a moisture-retaining layer in a larger winter quarter. Do not fill every gap. Then cover the structure with existing soil without closing off all possible entrances.
You can cover the surface with existing vegetation or replant suitable plants. In the example from the garden expedition, herb-bennet (Geum urbanum) was among the plants put back in place. This is one possible example, not a required species for every refuge. A loose layer of twigs can provide additional cover. Try not to reopen or rearrange the spot every time you work in the garden.
A refuge can help only if an animal can reach it and the conditions inside are suitable. The surrounding area matters too: other places to shelter among leaves, dead wood, roots or stones can usefully complement a small winter quarter. Amphibian and Reptile Conservation identifies cavities in loose material as possible winter refuges; Froglife also describes combinations of stones, wood and soil.
It is impossible to predict whether a common toad (Bufo bufo), a frog or a newt will use the refuge. The sources provide no occupancy figures for individual buried flowerpots and no reliable minimum depth for this design. An unused refuge is therefore not automatically a failure: it can be an additional option, and whether it is used depends on its location, accessibility and the conditions in the garden.
The guidance described here comes partly from the UK and partly from Bavaria. Froglife and Amphibian and Reptile Conservation provide practical information from the UK; the LBV article concerns a toad cellar featured in a regional nature-gardening guide. These sources offer useful general ideas, but do not guarantee that every design will work in the same way everywhere.
No. What matters is not whether the pot is completely underground, but whether it creates a sheltered, accessible cavity. Froglife also describes upside-down pots with side entrances. The soil and water conditions in your garden will determine the most suitable way to position it.
It should not dry out, but it should not stay flooded either. Leaves can retain moisture; frost protection and protection from flooding are also important requirements for winter refuges. The sources do not specify a particular moisture level or an exact proportion of leaf litter.
No. The refuge is intended as a place animals can choose to use. It is impossible to predict with certainty whether they will take to it. The sources do not recommend introducing amphibians.
A single pot is not equivalent to the larger toad cellar described by LBV. It can only provide an additional, smaller cavity. The sources cited do not give a guaranteed minimum size or figures for overwintering success for refuges made from pots.
The sources do not specify a fixed time of year for building an individual pot refuge. It makes sense to create the structure when the ground is workable and you can then disturb the area as little as possible. Avoid breaking open an existing structure in winter, as it may already be in use.
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Last updated: 11/10/2026. Corrections can be reported via the feedback form.