Alder Cones

Alder Cones — A Bioactive Essential for Isopods & Millipedes

Alder cones are one of the most popular and well-loved natural additions in the invertebrate hobby — and for good reason. These small, woody cones from the alder tree are packed with tannins and organic goodness, making them an outstanding enrichment item and food source for isopods, millipedes, and bioactive terrarium setups alike.

Why Isopods & Millipedes Love Alder Cones

• Rich in tannins — Alder cones release beneficial tannins into the enclosure, helping to maintain a slightly acidic, naturalistic environment that many isopod and millipede species thrive in.
• Natural food source — As alder cones slowly soften and break down, isopods and millipedes will graze on the organic matter, fungi, and biofilm that develop on the surface — providing a varied and nutritious supplement to their diet.
• Shelter & hides — Their compact structure provides cosy spots for isopods to tuck into, rest, and moult safely away from light and disturbance.
• Humidity support — Alder cones help retain localised moisture within the enclosure, contributing to the humid microclimate that most isopod and millipede species require.
• Bioactive-friendly — They decompose gradually and naturally, integrating seamlessly into the clean-up crew cycle without disrupting your enclosure’s ecosystem.
• Beautiful aesthetics — Scattered across the substrate or tucked into planting areas, alder cones add a charming, naturalistic forest-floor feel to any vivarium.

Benefits in Bioactive Terrariums

• Drives the decomposition cycle — As alder cones break down, they feed beneficial bacteria, fungi, and microfauna — the invisible engine that keeps a bioactive enclosure clean, balanced, and self-sustaining.
• Supports springtail colonies — Springtails thrive on the fungi and organic matter that develop on decomposing alder cones, helping to keep mould and waste under control throughout the vivarium.
• Natural pH buffering — The tannins released by alder cones help maintain a stable, slightly acidic environment — ideal for tropical and temperate bioactive setups alike.
• Safe for reptiles & amphibians — 100% natural and untreated, alder cones are safe for use in enclosures housing reptiles, amphibians, and invertebrates.

Suitable for all isopod and millipede species including Porcellio scaber, Armadillidium vulgare, Cubaris sp., Narceus sp., and many more. An excellent addition to tropical, temperate, and arid bioactive setups.