Trees that feed the soil
Nitrogen fixers and pioneers that build fertility on ground where nothing else will start.
- 01
Restoration№ 3144 minNitrogen-Fixing Trees: Free Fertility Forever
Trees partnered with soil bacteria pull nitrogen from the air, feeding degraded soils and whole guilds without a bag of fertiliser.
- 02
Trees№ 0074 minAlder: The Nitrogen-Fixing Wet-Site Pioneer
How alder partners with Frankia bacteria to fix nitrogen, hold stream banks, and turn waterlogged ground into fertile soil for the trees that come next.
- 03
Trees№ 4155 minSea Buckthorn: Nitrogen, Salt, and Sand
A nitrogen-fixing pioneer that stabilises dunes, tolerates salt spray, and carries one of the highest vitamin C loads of any temperate fruit.
- 04
Trees№ 0475 minBlack Locust: Rot-Proof Timber, Nitrogen, and a Bad Reputation
A nitrogen-fixing tree with fence posts that outlast concrete — and one of the most aggressively invasive trees in Europe.
- 05
Trees№ 0016 minAcacia: The Thorn Trees That Hold the Drylands
Nitrogen-fixing dryland keystones, the ant partnerships and chemical defences, and the reverse-phenology tree that fertilises crops beneath it.
- 06
Trees№ 3175 minNitrogen-Fixing Shrubs: The Frankia Partnership
Sea buckthorn, goumi, Siberian pea, and their kin. Shrubs that host Frankia bacteria and pull 70 to 180 kg of nitrogen per hectare out of thin air.
- 07
Wildlife№ 3154 minNitrogen-Fixing Bacteria: Free Fertiliser in Every Root
How Rhizobium, Frankia, and free-living bacteria pull atmospheric nitrogen into the living world and feed every productive ecosystem.
- 08
Restoration№ 3573 minPioneer Species: Nature's First Responders
How pioneer trees colonise bare ground, stabilise soil, and create conditions for full ecosystem recovery in restoration work.