Protecting Seed Viability Through Temperature and Humidity Control

Seed storage is a critical aspect of maintaining the viability and quality of seeds for future use. Controlling humidity levels within a storage environment is essential to prevent moisture-related damage such as germination loss, fungal growth, and deterioration.

Maintaining appropriate, stable humidity conditions helps reduce moisture related deterioration and supports seed viability during storage. The required temperature and relative humidity depend on the seed species and storage objectives.

Why this Matters in Rehabilitation Programs

Seed is often stored across multiple seasons, locations, and deployment stages. While temperature is typically controlled, unmanaged humidity can lead to gradual declines in viability, increased fungal risk, and inconsistent germination outcomes.

Maintaining stable humidity conditions helps preserve seed quality and reduces variability at the point of use.

What we typically see on projects

• Temperature is well controlled, but humidity fluctuates

• Storage conditions vary between locations or over time

• Seed is held longer than originally planned

• Viability issues only become visible at deployment

Three examples of how this approach has been implemented in practice:

Seed Storage Projects

Client Feedback - Mine Rehabilitation Seed Storage

“All reports onsite are the units are functioning well and the Rehab Team(s) are very happy with their new assets

Mead Ludwig-Bohan, Project Coordinator, South32

if seed storage forms part of your rehabilitation or closure planning, we are happy to share practical design considerations based on similar projects.

A short overview of how controlled seed storage systems are configured in real applications:

How humidity control improves outcomes

• Maintains consistent seed moisture content

• Reduces fungal growth and contamination risk

• Improves germination consistency at deployment

• Supports longer-term or staged storage programs

Where this approach is used

• Mine rehabilitation and closure programs

• Environmental seed banks and storage facilities

• Research and controlled agriculture environments

• Remote or staged deployment projects

Humiscope has worked with many storage and preservation applications.  With seed storage, we have seen the benefits of using a desiccant dehumidifier within a cold room environment, and the pitfalls when dehumidification is not used.