Sunday 26 January 2025 was Seed Swap Day – never heard of it?
Neither have we, but as seeds are the foundation of global food security, we think it’s an important day to raise awareness. Seed Swap Day is dedicated to preserving genetic diversity and promoting sustainable agricultural practices. The aim of the event is to exchange seeds, protect regional varieties and share scientific knowledge about plants and their adaptability.
About seeds
Seeds, also known as seed grains or seed fruits, are dry, dormant reproductive organs such as seeds and fruits. They contain the complete embryo of the plant and can remain viable for years if stored in a dry and cool environment. After harvest, seeds often go into a dormant state, which is broken down enzymatically to allow seasonal germination.
Seed size and weight vary considerably: Thousand seed weight (TSW) ranges from 1.75 grams for red clover to 700 grams for fava beans. Seeds are often calibrated or coated to improve handling in agriculture. Key quality characteristics include health, varietal purity and germination. Seed treatments help protect against fungi and pests.
The sale and use of seed is regulated by seed trade laws. International organisations such as UPOV and ISTA promote global seed exchange and quality assurance. Gene banks, including the famous Svalbard Global Seed Vault, preserve genetic diversity for future generations and contribute to global food security.
Seeds are essential to biodiversity. In particular, old or ‘heirloom’ varieties play a crucial role as they provide genetic resources adapted to specific environmental conditions. These varieties are often resistant to disease and pests and have unique flavour characteristics. In contrast, the increasing use of hybrid seeds leads to a loss of genetic diversity, which can reduce the adaptability of agricultural systems in the long term.
What happens on Seed Swap Day?
Seed Swap Day provides a platform for the sharing and distribution of this valuable cultural asset. Participants are encouraged to bring surplus seeds in good condition – dry and pest-free. Labelling seeds with their botanical name, origin and cultivation instructions helps to ensure scientific exchange and maintain the quality of information.
Local exchange markets and workshops organised by communities, environmental organisations and scientific institutions create spaces for discussion on sustainable agriculture and biodiversity. In addition, online platforms enable seed exchange across regional networks and support global initiatives to conserve plant diversity.
The day serves as a reminder of the importance of genetic diversity in adapting to climate change and ensuring food security. By participating, everyone can help conserve resources and share knowledge. Mark your calendar for 26 January 2025 and be part of a movement that connects science, practice and community!