Art of Seed Saving

In today's rapidly changing agricultural landscape, the art of seed saving has become an invaluable skill for market gardeners and food growers alike. By preserving and cultivating heritage varieties, we not only safeguard our agricultural heritage but also ensure the availability of diverse and resilient plant genetics for future generations. In this blog post, we delve into the world of seed saving, exploring its significance, techniques, and the steps market gardeners can take to participate in this vital practice.

The Significance of Seed Saving:

Seeds are the lifeblood of not only agriculture but the food we eat everyday. They contain the genetic information that determines a plant's traits, including its taste, appearance, and resilience. In recent decades, the dominance of commercial seed companies and the rise of hybrid and genetically modified varieties have threatened the diversity and availability of heirloom and open-pollinated seeds. By engaging in seed saving, market gardeners play a crucial role in preserving and promoting these unique and often rare varieties.

Understanding Open-Pollinated and Heirloom Seeds:

Open-pollinated seeds are plants that naturally pollinate through wind, insects, or other natural means, maintaining their genetic diversity over generations. Heirloom seeds, a subset of open-pollinated seeds, are varieties that have been passed down through generations, usually for at least 50 years. They offer a connection to our agricultural history and often possess distinct flavours, colours, and characteristics that make them highly sought after by chefs, gardeners, and seed enthusiasts.

Selecting Suitable Plants for Seed Saving:

Not all plants are suitable for seed saving. Some plants readily cross-pollinate, leading to hybridisation and loss of true-to-type characteristics. Market gardeners should carefully select open-pollinated or heirloom varieties that are self-pollinating or have minimal chances of cross-pollination. Additionally, choosing plants with desirable traits, such as disease resistance, adaptability to local conditions, or unique flavour profiles, helps ensure the preservation of valuable genetic diversity.

Techniques for Successful Seed Saving:

Seed saving involves several key steps, including selecting healthy and mature fruits, proper seed extraction, cleaning, and drying. Each plant species requires specific considerations and techniques for successful seed saving. In this section, we provide an overview of the seed-saving techniques for popular market garden crops such as tomatoes, peppers, lettuces, beans, and herbs. We explore isolation distances, hand-pollination methods, fermentation, and dry processing to equip market gardeners with the knowledge needed to embark on their seed-saving journey.


1.) Storing and Maintaining Seed Viability:

Proper storage is essential to ensure the longevity and viability of saved seeds. By following appropriate storage techniques, market gardeners can preserve the genetic integrity of their seeds for future use. Here, we delve into key considerations for storing and maintaining seed viability.

Cool and Dry Environment:

Seeds are best stored in a cool, dry environment with consistent temperatures. Fluctuations in temperature and humidity can negatively impact seed viability. Ideally, seeds should be stored at a temperature between 32°F (0°C) and 50°F (10°C), with humidity levels kept below 50%. A cool basement, cellar, or a dedicated seed storage room can serve as suitable storage spaces.

Dark and Airtight Containers:

Protecting seeds from light is crucial, as exposure to light can trigger premature germination or reduce seed viability. Choose opaque, airtight containers such as glass jars or metal tins to store your seeds. Ensure the containers are clean and dry before use, and label them clearly with the seed variety and the date of collection.

Moisture Control:

Excess moisture can lead to seed damage or encourage mould and fungal growth. To prevent moisture buildup, consider adding desiccant packets or moisture-absorbing materials, such as silica gel or powdered milk, to the storage containers. These help to maintain a dry environment and extend the longevity of the seeds.

Seed Packaging:

For long-term storage, it is advisable to store seeds in individual packets or envelopes. Use seed envelopes, small paper bags, or coin envelopes to keep the seeds separate and organised. Additionally, include a note or label with relevant information such as the seed variety, collection date, and any specific instructions for germination or special considerations.

Seed Viability Testing:

Over time, seed viability naturally declines. To ensure the reliability of saved seeds, conduct periodic viability tests. One common method is the germination test, where a sample of seeds is placed on a damp paper towel or in a germination tray to observe how many seeds sprout. This test helps determine the germination rate and provides insight into the seed's viability.

Seed Longevity and Germination Tips:

Different seeds have varying lifespans, with some retaining viability for several years or even decades. Understanding the longevity of specific seeds will guide you in prioritising their use. Generally, larger seeds such as beans and squash tend to have longer viability than smaller seeds like lettuce or onions.

To improve germination rates and seed longevity, consider storing seeds with silica gel packets or in airtight containers in the refrigerator or freezer. Some seeds, especially those that require a period of dormancy or stratification, benefit from pre-storage treatments like cold stratification to simulate winter conditions.

Remember to periodically check stored seeds for signs of damage or mould. Remove any compromised seeds to prevent potential contamination of other seeds.

By implementing these storage practices, market gardeners can ensure the longevity and viability of their saved seeds, maintaining a valuable resource for future plantings and seed exchanges.


2.) Exchanging and Sharing Seeds:

Seed saving is not just an individual endeavour; it is a communal practice that thrives on collaboration and the sharing of resources. Engaging in seed exchanges and sharing seeds with fellow market gardeners and growers contributes to the preservation and diversification of our seed heritage. Here, we explore the significance of seed exchanges and provide guidance on how to participate in this enriching practice.

The Value of Seed Exchanges:

Seed exchanges offer a wonderful opportunity to expand the diversity of plant varieties in your garden while building connections within the gardening community. By participating in seed exchanges, you can access a wide range of open-pollinated and heirloom seeds that may not be readily available through commercial sources. These unique and locally adapted varieties often possess exceptional flavours, cultural significance, and resilience.

Local Seed Libraries and Networks:

Start by exploring local seed libraries, community gardens, or agricultural networks in your area. These organisations serve as valuable resources for connecting with fellow growers and participating in seed exchange programs. Many communities organise seed swaps or seed-sharing events where growers come together to exchange seeds, knowledge, and gardening experiences.

Organising Your Own Seed Exchange:

Consider hosting a seed exchange event within your local gardening community or market gardening network. Choose a convenient location, such as a community centre, farmers' market, or a shared gardening space. Promote the event through social media, local gardening groups, and newsletters. Encourage participants to bring their own saved seeds to share and provide a space for growers to display their offerings. This collaborative gathering can foster valuable relationships, seed diversity, and knowledge sharing among growers.

Proper Packaging and Labelling:

When participating in seed exchanges, it is essential to package and label your saved seeds properly. Use envelopes, small bags, or coin envelopes to hold the seeds securely. Include clear and accurate labels specifying the seed variety, collection year, and any relevant details such as growth habits or special growing requirements. Good labelling ensures that others can grow and enjoy the seeds successfully.

Sharing Knowledge and Stories:

Seed exchanges not only involve the exchange of seeds but also the sharing of gardening experiences and knowledge. Engage in conversations with other growers, learn about their cultivation techniques, and share your own insights. Consider including a note or story about the seed variety you are sharing, such as its cultural significance, unique flavour profile, or historical background. These personal connections and shared stories add depth and richness to the seed exchange experience.

Supporting Seed Sovereignty:

Participating in seed exchanges supports the concept of seed sovereignty, which emphasises the rights of individuals and communities to save, exchange, and develop their own seeds. By preserving heirloom and open-pollinated varieties, market gardeners play a vital role in maintaining local biodiversity, fostering food security, and building resilient agricultural systems.

Seed exchanges and sharing play a pivotal role in preserving heritage varieties, fostering community connections, and enhancing the diversity of our food system. Engaging in these practices not only provides access to a wide array of unique seeds but also promotes knowledge sharing and strengthens the collective efforts toward seed sovereignty. By participating in seed exchanges, market gardeners contribute to a thriving network of growers dedicated to preserving our agricultural heritage for future generations.


The art of seed saving empowers market gardeners to become stewards of our agricultural heritage while contributing to a sustainable and diverse food system. By preserving and cultivating heirloom and open-pollinated varieties, we secure a future where flavour, resilience, and cultural significance thrive. Whether it's the vibrant hues of a heritage tomato or the delicate fragrance of an heirloom herb, the seeds we save today hold the potential to nourish and inspire future generations of growers, ensuring a resilient and bountiful harvest for years to come.

Remember, each seed exchanged represents a story, a piece of our collective history, and the potential for abundant harvests to come. Embrace the spirit of collaboration, share your seeds, and cultivate connections that nurture both plants and communities.

AllotmentFood growingMarket gardeningRegenerative agricultureSeed savingSmall scale farmingSustainability