From One Quarry to Many: A Replicable Model for Africa & Global Quarry Restoration Projects

Assessment of Seed Production Requirements at Wazo Hill Quarry and Seed Bank

What began as a restoration pilot at Wazo Hill Quarry is now poised to transform quarry rehabilitation across Africa.

Our Twiga Eco-Box system, combined with standardized native seed collection and storage protocols, creates a replicable blueprint for restoring biodiversity in degraded quarries. By establishing local seed supply systems, this approach reduces costs, enhances ecological resilience, and supports long-term, nature-based restoration.

The vision is bold but achievable: seed banks in every quarry, ensuring native species thrive, ecological functions are restored, and local communities benefit from sustainable ecosystem services.

By integrating this system into quarry rehabilitation plans, Heidelberg Materials and partners can lead a continental shift toward climate-smart, biodiversity-driven restoration, demonstrating that innovation, science, and sustainability can scale beyond a single site.

The replication pathway:

Assess: Map ecological conditions and native species requirements.

Build: Deploy Twiga Eco-Box seed banks and local solar drying facilities.

Scale: Expand across multiple quarries, creating a network of native seed hubs.

This initiative positions Wazo Hill as the blueprint for Africa’s quarries to follow, turning lessons learned into continent-wide ecological impact.

References:

  • Broadhurst, L.M., et al. (2008). Seed supply for broadscale restoration: Maximizing evolutionary potential. Evolutionary Applications, 1(4), 587- 597.
  • Merritt, D.J., & Dixon, K.W. (2011). Restoration seed banks: A tool for restoring plant diversity in degraded landscapes. Australian Journal of Botany, 59(6), 437- 451.
  • Society for Ecological Restoration (SER). 2019. International Principles and Standards for the Practice of Ecological Restoration. 2nd edition.

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