The directions for seed saving in our last book, Making It, almost got cut. Perhaps we should have just changed those directions to “Why it’s OK to buy seeds.” The fact is that it’s not easy to save the seeds of many vegetables thanks to the hard work of our bee friends.
That being said, Shannon Carmody of Seed Saver’s Exchange gave a lecture at this year’s Heirloom Exposition with some tips for ambitious gardeners who want to take up seed saving. Here’s some of her suggestions:
1. Maintaining varietal purity
Is the vegetable open pollinated or hybrid? Hybrid seeds don’t produce true to type. You can’t save and regrow the seeds of hybrids, at least not without a lot of complicated multi-generational outcrossing in order to create a new variety that produces true to type. [I’ll note that I’m not anti-hybrid. The increased vigor of hybrids can be advantageous if you’re having trouble in your garden.]
2. Know how the vegetable is pollinated
It’s much easier to save the seeds of self-pollinating vegetables such as beans, peas and tomatoes. Remember that bees can fly for miles–anything pollinated by insects have to be isolated or caged to prevent cross-pollination. And many vegetables have weedy cousins. Try to save the seeds of carrots without caging and you may get a carrot/Queen Anne’s lace hybrid that won’t taste good. And some supposedly self-pollinating plants such as tomatoes have rogue varieties that can be cross pollinated by insects.
3. Consider your climate
Bienneals require two years of growth in order to set seeds. If you live in a cold climate that could be a problem.
4. Population size
Serious plant breeders often plant a minimum of sixty plants so that they can choose the most vigorous for seed saving. And they’ll often plant just one variety to reduce the risk of crossing. One way around the population size requirement is to crowd source the problem and get a bunch of friends to grow the same vegetable.
5. Space requirements
Some biennials get really big in the second year. You’ll need to make sure they have space and won’t shade out other plants.
6. When to harvest
Fruits harvested for seed may need to stay on the plant for a long time. For example, eggplants that you want to save seed from need to be harvested well past when they’re still edible.
7. Prepping seeds
In general, seeds harvested when dry, such as lettuce need to be air dried before storing. Seeds harvested wet, such as watermelons, need to be washed with water before drying and storing. Tomato seeds need to be fermented in water for a few days before drying.
Moisture is the enemy of seed storage. Those packs of desiccant that come with electronic gadgets can be recycled and used in your seed storage boxes.
There’s no shame in buying seeds
In our small garden it would be nearly impossible to save the seeds of readily pollinated vegetables such as members of the Cucurbitaceae family. But it would be great to have varieties of vegetables adapted to our dry Mediterranean climate. Most seed saving operations use lots of fertilizer and water and the result is vegetables that are adapted, unsurprisingly, to requiring tons of fertilizer and water. Native Seeds/SEARCH is a notable exception. But we need more regional seed saving groups run by trained horticulturalists. In the meantime I buy seeds and stick to saving just the easy ones–beans, peas and tomatoes.
If you want more information about seed saving the bible of the subject is Suzanne Ashworth’s book Seed to Seed.
How have your seed saving endeavors gone? What seeds do you save? Have you ever gone through the trouble of bagging seed heads or caging plants and hand-pollinating?