Cremation Institute

Keepsakes

Biodegradable urns

Biodegradable urns are designed to break down naturally over time, returning the ashes to the earth or water. They suit families who want a greener, gentler goodbye.

Our picks

My Favorite Biodegradable Urns

Our most-recommended biodegradable urns for every setting: planting a tree, an earth burial, or a release on the water.

Products link to You Are Forever, our sister memorial store, or to partners; we may earn from qualifying purchases. Prices shown were current when this guide was updated.

Water urns vs earth urns

Biodegradable urns generally come in two forms. Water urns are built to float briefly and then sink and dissolve, making them ideal for a release at sea or on a lake or river. Earth urns are made for burial, breaking down in the soil over months.

Tree and plant urns

A popular variation is the tree urn, which combines the ashes with soil and a seed or seedling so that a tree or plant grows as a living memorial. These are designed to be planted in a garden or a place that was meaningful to your loved one.

Common materials

Biodegradable urns avoid plastics and metals in favour of materials that decompose safely.

  • Recycled or handmade paper
  • Compressed salt (dissolves quickly in water)
  • Sand and gelatine
  • Plant fibres, bamboo and cellulose
  • Soil-and-seed blends for tree urns

Before you buy

If you plan a water release, check local rules — many regions require scattering or release at a set distance from shore. For a burial, confirm your cemetery or green burial ground permits biodegradable urns.

FAQ

Biodegradable urns: common questions

Are biodegradable urns allowed for sea release?
Often, yes, but rules vary by country and region. Many places require the release to happen a set distance from shore and ask that only fully biodegradable materials enter the water. Check local regulations before planning.
How long do biodegradable urns take to break down?
It depends on the material and environment. Salt or paper water urns can dissolve within hours to days, while buried earth urns typically break down over several months.
Adam Binstock

About the author

Adam Binstock

Founder of Cremation Institute

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