How to Save Tomato Seeds

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How to Save Tomato Seeds l A few steps and you can grow your own from seed l Homestead Lady (.com)In a few, simple step learn the art and science of how to save tomato seeds!  Heirloom tomatoes are so tasty to grow but the seed can be expensive to buy every year.  Save money and control the health of your tomato harvest by learning to save your own seed.

If saving seeds is your thing, try doing it with friends!  Be sure to read the Seed Swap section of our book, The Do It Yourself Homestead.  Don’t have your own copy?  Click below to see what it’s about!  If you’d like to read a sample from the book, just email me at Tessa@homesteadlady.com.  Be sure to let me know it’s the Seed Swap section you’re interested in.  With eight chapters of homesteading how-to’s and over 400 pages of homesteading information, there’s bound to be a lot that will interest you!

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Garden Nerd

Tomato seeds!!  I love tomato seeds.  I love opening up a new packet, full of possibilities, and having the little buggers fall out into my palm, all round-ish and sweet.  They promise to produce miracles in my garden.

I love tomato seedlings, too.  You see them dependably popping up in your seed-starting trays, even though there’s still icy spring weather outside.  You can run your hands over them and they smell like summer.  And you know, you just know, summer is coming.

Here’s how you can preserve that harvest for next year’s garden by learning how to save tomato seeds.

By the way, if you’re new to seed saving and want to start with your adventures with fewer steps and no fermenting (keep reading), try kale seed.  Learn to save kale seed, by clicking here.

Save Heirloom Tomato Seed

One bummer thing about growing tomatoes is paying good money for seeds.

Now, if you want to grow hybrid tomatoes, you’re pretty much stuck with paying for them every year if you want dependable production.

Hybrids aren’t bad (don’t confuse them with GMOs or anything shady like that); you’re a hybrid, after all.  To make you, God took some of your mom and some of your dad and, voila, you appeared in all your awesomeness.  However, when you reproduce, your children are created, not your mom or dad.

Hybrid seeds don’t produce true to their parents and so it’s a guessing game as to what you’re going to get in their offspring plant.
Even in tomato seeds, which are very happy to reseed themselves.  One example of undesirable, mutant-child behavior on a hybrid tomato is great vining and plant growth, but no fruit set.  This is why we do NOT save hybrid seed for replanting, as a general rule.

If you prefer the great taste and seed-saving ability of heirloom tomato varieties, then learning how to save tomato seeds is for you!  When you learn how to save tomato seeds, it can help relieve that budget spasm that hits early spring when you place your seed orders.  That freak out moment when you ask, “Did I really spend that much on seeds?!”

Don’t get me wrong, I still end up buying new tomato seeds every year because…well, quite frankly, I have an addiction problem.  But I’m trying out new varieties in the name of science.  Finding fantastic flavors that my family will love.  It’s for the children.  And I could stop any time.  Really.

Steps to Learn How to Save Tomato Seeds:

Oour seed group had Dale of Delectation of Tomatoes here in Utah come over and show us how to save tomato seeds.

First steps

  1. Dale brought out some of his huge, beautiful tomatoes and started hacking into them.  He carved into the center and opened one up, revealing the fat flesh inside, housing hundreds of seeds per tomato.
  2. Then, he squished them out with his fingers and put them in a recycled yogurt container that he’d cleaned out.  So far, very high tech stuff here.
  3. Dale said that it’s best to take seeds from several of the same variety of tomato for genetic diversity within that variety.  Bear that in mind when you’re harvesting tomatoes for seed and take several from each plant.  He also said that it’s important to pick your best performing tomatoes for seed saving.  So, when you’re planting, plan to plant a few of each variety from which you want to save seed just to have a good mix.  When it’s time to harvest, pick the tomatoes with the characteristics you desire in future tomatoes.

How to save tomato seeds - www.homesteadlady.com - must label saved seeds

Next Steps

  1. Dale looked around the outside of his tomato for any scars or squishes or cracks and carved them off.
  2. He plopped the impurities he’d carved off into the yogurt container with the seeds.  Dale said that all those blemishes he cut off have the bacteria you want for fermenting tomato seeds.  Yes, fermenting!  Fermenting tomato seeds is a necessary step in successfully saving them.  Tomatoes have a gel sac around their seeds that is meant to protect the seed until the next season when it’s time for them to germinate.  In nature, that gel would be broken down and the growth inhibitors would dissipate after the tomato had sat and decomposed through the winter.  Fermenting the tomato seeds in the yogurt container just mimics that process.
  3. Then Dale squished all the liquid from the tomato and his cutting board into the container.
  4. Next, he added enough water to cover the seeds and secured the lid (just so that smell the coming fermentation process didn’t escape – not pleasant).
  5. Then, very important step here, Dale LABELED the container and attached a future seed envelope to the lid so that all the information for that tomato variety was right there, taped to the container.  Labeling, so important.  Something at which I usually stink.

How to save tomato seeds - www.homesteadlady.com

Final Steps

  1. Dale instructed us to put our seeds somewhere warmish and safe on a counter or shelf.  He also told us to give them a swoosh every day and check them to watch for signs of mold.
  2. Once the seeds have developed a nasty, gloppy mold at the top that covers the width of the container, they’re ready for final processing.  This takes around a week, but it really depends on how warm it is in your house.
  3. At this point, Dale instructed us to transfer the contents of the seed container into a small bucket, and to add some water.
  4. He then showed us how to let it sit for a minute, and then dump off the top, yucky water.
  5. Dale repeated this process, adding clean water again when he was done.  He let them sit to settle again, and then swished the seeds and dumped off more gunk.  He repeated until your water was clear.
  6. Healthy, viable seeds will sink.  The useless ones will float to the top where you can just skim them off and dump them.  If you ferment your seeds too long, they’ll start to germinate in the container (not that I would know that from personal experience, of course).  So, Dale was sure to remind us to keep checking the seeds and process them as soon as they’re done. How to save tomato seeds - www.homesteadlady.com

A Quick Note on Kids

Be sure to involved your kids, grandkids or even neighborhood kids in this process.  Learning to save tomato seeds is hands-on, messy, interesting and even gross (what with all the fermenting).  That’s a perfect combination for kids!  Saving tomato seeds could be a cool science project for school or just a neat way to both teach and hang out with the children close to you.

Passing on this homestead/garden wisdom is a duty – a duty that should be fun!  Do youself a favor and involve some kids in this seed saving adventure.

To Dry and Store the Seeds

Drying them doesn’t have to be complicated – a plate and a place with good air circulation will do.

A caution to people with kids or cats or both: put the drying seeds somewhere that curious fingers and feckless paws can’t find them.

Once they’re dry, pop the seeds into prepared envelopes and put them into your tomato seed file.

Learning how to save tomato seeds is simple and kind of cool – molding on purpose, you gotta admit there’s something cool about that.   It also saves you money and helps you control the quality of your plants.

In fact, you’ll get so good at this seed-saving thing that you’ll need to find a good place to store all those saved seeds.  You’ll end up with a lot!  We use file boxes with hanging folders for each plant family.  I also have folders for the many random delineations I’ve come up with like “bean-ish” and “Zen garden” (my herbs).  How do you keep your seeds safe and stored?

This organization will not only serve you well during the growing season, but it will also make it easier to share seeds with your friends.  Or, your seed group.

Free Sample

Don’t have a seed group?  Remember to email me for that free sample of the Seed Swap section of our book!  Tessa@homesteadlady.com.  Don’t just settle for my word on the subject, here’s a fellow garden nerd and author to tell you what she thinks of The Do It Yourself Homestead:

A gardener's praise for The Do It Yourself Homestead

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DisclaimerInformation offered on the Homestead Lady website is for educational purposes only. Read my full disclaimer HERE.

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6 thoughts on “How to Save Tomato Seeds

  1. I’m a little confused. How long should they stay in the fridge? Only until the mold grows, the one time? In a typical home fridge, about hoe long does it take to get to that point?

    Thank you so much for posting this! Now, I know where I went wrong! I completely skipped the fermentation process. :-/ In my defense, I was trying to figure it out on my own, & had no sources to trust. Hopefully, now, I’ll be able to make it work, this time! And I have JUST the teenager to do Sal the swishing! She LOVES weird stuff, to. Lol.

    1. Glad you asked for clarification – it’s good to know where I was vague! You actually leave your container out at room temperature – just some place where it won’t get knocked over. It usually takes around a week but that totally depends on how warm it is in your house – the warmer it is, the faster it will mold. Once the mold guck covers the top of the container, you’re good to start rinsing.
      Yeah for teenagers who like gross stuff! Where can I get me one of those? Actually, terrifyingly, my first will be twelve in just a year. Ack!

  2. Fascinating! Thanks for sharing at Wellness Wednesday! I have saved squash seeds and sunflower seeds, but tomatoes were way too intimidating! Loved reading through this process!

  3. I did this last year and it was a lot of work. I still have tomatoes coming in so I guess if I want to do it again now would be the time. Love the label from your little helpers. That is priceless. 😀

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