How to save tomato seed

tomato seeds rotting in water

Seeds fermenting in water. Not pretty, but pretty important! The jar got shaken up while walking it outside for its photo op., so it looks a little cloudy and messy. In your jar, you should see a layer of scum on top of the water.

I can’t believe we haven’t posted about this before–it seems like we have, but I can’t find the post if this is so. Perhaps we wrote about it in one of our books…the old brain is getting foggy.

It’s easy to save seed from your favorite tomatoes. Seed saving in general is actually a little tricky. You can’t just save the seed from any old vegetable in your garden and hope that it will yield plants like the parent. Cross-breeding is an issue. Professional seed savers use all sorts of sacks and screens and boxes to ensure that busy bees or flirtatious winds don’t make romance happen where it ought not. Otherwise you get acorn squash crossing with melons and who knows what not. It depends on the type of vegetable you want to save seed from–as well as what else you’re growing around it.

Tomatoes, however, are a pretty safe bet for seed saving. They are self-fertile, and the structure of their flowers makes cross pollination difficult. Our seed saving Bible, Seed to Seed, says that there are only three types of open pollinated tomatoes that you can’t save seed from (without putting them in isolation):

  1. Currant tomatoes (L. pimpinellifolium)
  2. The potato leaved varieties of L. lycopersicum
  3. Any fruit born from double blossoms on Beefsteak-type tomatoes. Double blossoms are prone to cross-pollination.  You can save seeds from fruit that came from a single blossom

Odd, but simple! You can basically save seed from almost any heirloom/open-pollinated variety you’re likely to  be growing. You cannot save seed from hybridized plants. These are the type you are most likely to find in the nursery–plants bred for performance, not seed saving. This would include popular breeds like Early Girl and Better Boy and Sun Golds.  If you’re not sure if your tomatoes are hybrids or not, just Google the name. The Internet is wonderful that way.

The process of saving tomato seed is simple. All you have to do is rot off the protective gel sack which surrounds each seed. This gel inhibits germination, keeping the seeds from germinating while still in the tomato. In nature, the gel rots off while the fallen tomato sits on the ground. Here, you will speed the process along with some water. In addition to removing the gel sack, this fermentation process also kills many seed-borne tomato diseases.

How to Save Tomato Seed

  1. Choose your best, tastiest tomatoes for seed saving.
  2. Scoop out the seed pulp and drop it into a jar. Or just squeeze a whole tomato over the jar.   It’s best to just squeeze cherry tomatoes. (You can use food processor, too, if you’re doing big batches.)
  3. Pour a little water over the pulp. It should cover the pulp by say, 2-3  inches or so.
  4. Cover the container and let it sit for a few days (3 days, roughly–weather makes a difference), until white or grey mold forms on the surface of the water. If you do a big batch, you will smell the rot. Don’t worry about it–just keep the dogs away! Watch for the mold to form and continue on to the next step. The mold may be impressively fuzzy, or it may just be a slight opaque slick on top of the water. Don’t let it sit in this state too long, or the seeds will start germinating in their bath.* If you’re in doubt as to whether it is ready, it’s ready. Far better to stop a little early than to let the seeds accidentally germinate.
  5. Pour off the moldy water, reserve the seeds.
  6. Add clean water back to the seeds and give the water a swirl. Let it settle. Any bad seeds will rise to the top. If they do, pour them off.
  7. Strain the seeds with a fine strainer (a teas strainer is fine for small batches) and spread them out to dry. They need to dry on something which will wick water away, because it is important that they dry quickly–otherwise they might germinate. Coffee filters work well, as do pieces of window screen, or paper plates. Tomato seeds stick to paper towels, so if you use those you may end up having to plant the seeds on their little bits of towel.
  8. Once they are bone dry, transfer to envelopes or glass jars for storage. Be sure to label!

*I just lost a batch to germination. I blame the heat. It didn’t seem like they’d be fermenting that long, but after I drained my seeds I saw the tiny little white nubbins poking out of the seeds. Now I have to begin again. This is one reason why you should not wait ’til your last tomato to think about saving seeds. Also, this is a reminder to keep a close eye on your projects!

ETA: We’ve had some comments from what I’ll call the Paper Towel School of seed saving, and I thought I’d amend this post to point out that another method is to just spread some tomato pulp on a paper towel and let it dry out. The seeds will stick to the towel, so you store the whole towel and when planting time comes next year, you tear the towel into tiny pieces and plant the pieces. This does save steps. The method described above is the Official Method, and the method I’ve always used. I’ve not tried the paper towel thing myself, but it seems sensible. However, as  I understand it, the fermentation process in the water bath method kills diseases, so it is considered good etiquette to put your seeds through this process if you plan to share them with others.

Also check out the comments for more on the mystery of cross-pollinating tomatoes!

Michael Thiele and the Love of Bees

On Saturday, September 21st, Erik and I will be attending a day-long Biodynamic Apiculture Workshop with Michael Thiele, sponsored by the fine folks at Honey Love. We hear there are still some open spaces, so please join us if you can. Erik has seen Michael Thiele speak, and says he is mesmerizing.

Michael Thiele is the founder of Gaia Bees, and co-founder of The Melissa Garden (a honey bee sanctuary and resource center). His approach toward bees is deeply respectful and non-exploitative. He views honey as a gift and a medicine, not as a crop.

In the video above he is demonstrating a hive of his own design, the Sun Hive or Haengekorb, the shape of which reflects the nature, needs and processes of the bees–not us. He describes the hive as an “offering to the bees” to support their welfare. As you will see in the video, he and the bees share a remarkable understanding.

The Genetic Diversity of Watermelons

Navaho Watermelon

Damn those supermarket watermelons! Every one I’ve bought this summer has been mealy, old and tasteless. Why? Yet again, the folks who sell us our food have decided to grow only a handful of the over 1,200 known varieties of watermelons.

The one pictured above is a Navaho watermelon I picked up at the National Heirloom Exposition. Note the vibrant (and tasty) red seeds. Navaho watermelons are sometimes called “winter melons” since they can be stored for a few months.

Another watermelon I tasted at the Exposition was a yellow fleshed variety called Orangeglo. It was probably the sweetest and tastiest watermelon I’ve ever eaten.

The problem with supermarket watermelons is not due to the seedless vs. seeded issue. Seedless watermelons are created with a complex genetic process you can read about here. What’s more relevant to taste is how early watermelons are picked, how long they’ve been sitting around and the limited varieties commercial growers plant.

The Heirloom Exposition eloquently demonstrated the benefits of genetic diversity with its watermelon display and tasting. And that diversity is something we can all address in our gardens, if we have one, by planting unusual seeds. You can bet I’m going to try growing watermelons in next summer’s straw bale garden.

What kinds of watermelons have you grown and what’s your favorite?

Saturday Linkages: A Mega-Reference for Homesteaders

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CD3WD: A Mega-Reference for Homesteaders

CD3WD: A Mega-Reference for Homesteaders http://brinkoffreedom.net/homesteading/cd3wd-mega-reference-homesteaders/?utm_source=feedly …

BreadStorm http://www.farine-mc.com/2013/09/breadstorm.html …

Get Fit Like a Wild Man: A Primer on MovNat http://feedproxy.google.com/~r/TheArtOfManliness/~3/6JaxlN5A7Kc/story01.htm …

Tooth Fairy goes pneumatic http://hackaday.com/2013/09/13/tooth-fairy-goes-pneumatic/ …

Making Nikola Tesla a Saint Makes Us All Dumber http://paleofuture.gizmodo.com/making-nikola-tesla-a-saint-makes-us-all-dumber-1308034624 …

Let’s really make backyard hens legal in Pasadena CA! http://www.change.org/petitions/let-s-really-make-backyard-hens-legal-in-pasadena-ca?share_id=QwPdcnLXHr&utm_campaign=twitter_link_action_box&utm_medium=twitter&utm_source=share_petition …

Is it better to bike or run? http://well.blogs.nytimes.com/2013/08/29/ask-well-is-it-better-to-bike-or-run/ …

How Chris McCandless Really Died http://www.newyorker.com/online/blogs/books/2013/09/how-chris-mccandless-died.html?mbid=social_retweet …

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