6 Best Seed Extractors for Saving Tomato Seeds
Preserve your heirloom tomatoes for future gardens. Our guide reviews the 6 best seed extractors that simplify the process and ensure seed viability.
The end of the season brings a bittersweet harvest, with baskets full of ripe heirloom tomatoes and the first hint of frost in the air. For a hobby farmer, this is the moment to think about next year’s garden. Saving seeds from your best-performing, most flavorful tomatoes is one of the most rewarding parts of the cycle, ensuring those unique genetics carry on.
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Fermentation: The First Step in Seed Saving
Before you even think about an extractor, you have to deal with fermentation. Each tomato seed is encased in a gelatinous sac that contains germination inhibitors. In nature, this sac breaks down as the fruit rots, so we replicate that process to ensure viable seeds.
The method is simple. Squeeze the seeds and gel into a jar, add a little water, and cover it with a cloth or a loose lid. Let it sit for two to five days in a warm spot, stirring it daily. You’re looking for a layer of mold to form on the surface and for the viable seeds to sink to the bottom.
Don’t let the smell scare you; it’s a sign that the process is working. This crucial step not only removes the germination-inhibiting gel but also helps kill off seed-borne diseases like bacterial canker. Skipping fermentation is the most common mistake new seed savers make, leading to poor germination rates the following spring.
Weston Tomato Press for Large Heirloom Batches
When you’re processing dozens of pounds of Romas or Brandywines, efficiency matters. The Weston Tomato Press is a workhorse designed for exactly this scale. It clamps securely to a counter and uses an auger to push tomatoes against a screen, separating the pulp and juice from the seeds and skins.
This tool is a massive time-saver for large batches. You get two products at once: a bucket of relatively clean seeds ready for rinsing and a large volume of seedless, skinless pulp perfect for canning sauce. This dual-purpose output makes the effort of setup and cleanup well worth it.
The tradeoff is the investment and the cleanup. This isn’t a tool you pull out to save seeds from a single tomato. But if you’re serious about preserving multiple heirloom varieties or processing a significant harvest for food and seed, the Weston is a game-changer that turns an all-day task into a manageable afternoon project.
Victorio Food Strainer: A Versatile Classic
The Victorio Food Strainer is a staple in many homestead kitchens for a reason. It operates on the same principle as the Weston—separating pulp from seeds and skin—but is often seen as a more versatile, all-around kitchen tool rather than a dedicated processing machine. It’s fantastic for making applesauce, berry purees, and, of course, processing tomatoes.
Its hand-crank operation gives you excellent control over the speed and pressure, which can be helpful when working with different tomato varieties. Some juicier heirlooms might require a slower, more deliberate pace to avoid making a mess. The Victorio strikes a perfect balance between manual control and mechanical efficiency.
This is the ideal choice for someone who processes a moderate amount of produce throughout the year. It handles a 20-pound batch of tomatoes for seed saving without issue but is also ready for a bushel of apples a month later. It’s less of a single-purpose investment and more of a cornerstone piece of preserving equipment.
Johnny’s Tomato Squeezer: Simple & Effective
Sometimes, you just want to save seeds from that one incredible Cherokee Purple plant that outshone all the others. For this kind of small, targeted seed-saving, a large press is overkill. Johnny’s Tomato Squeezer is a simple, handheld device designed specifically for extracting seeds from a small number of tomatoes.
It works by pressing a halved tomato against a perforated cone, pushing the seeds and gel through the holes into a container below. It’s a purely manual process that is quick, effective, and requires almost no setup. The cleanup is equally fast.
This tool is not for processing sauce. It’s a specialized, small-scale seed extractor. Its value lies in its simplicity and purpose-built design, making it perfect for the gardener who wants to preserve a few select varieties without the hassle and expense of larger equipment.
OXO Good Grips Food Mill for Small-Scale Saving
Many hobby farmers already have a food mill in their kitchen for making mashed potatoes or baby food. This familiar tool can easily be repurposed for seed saving. By placing your fermented tomato slurry in the mill and turning the crank, you can press the liquid and seeds through the disk while holding back the larger bits of pulp and skin.
The key is to use a disk with holes large enough for the seeds to pass through. It won’t separate the seeds from the gel as cleanly as a dedicated press, but it does an excellent job of breaking everything apart and simplifying the final rinsing stage. It’s another great option for smaller batches.
Using a food mill is a perfect example of using what you have. Before you invest in a specialized piece of equipment, check your cupboards. An existing food mill can be a surprisingly effective and zero-cost entry into the world of seed saving.
The Blender Method: Using a Ninja Professional
Using a kitchen blender is the most accessible method, but it’s also the riskiest. The goal is to use the blades to separate the seeds from the pulp, not to make a seed-destroying smoothie. A powerful blender like a Ninja Professional works, but you must use it with extreme care.
The technique is to add your tomato slurry to the blender and use the "pulse" function for just one or two seconds at a time on the lowest possible setting. Do this a few times, and you’ll see the seeds separate from the pulp. The power of a good blender can do the job in seconds, but a few seconds too long will nick the seed coats and render them unviable.
This method is best for those who don’t have other equipment and are only processing a small amount. It’s a testament to ingenuity, but the risk of destroying your precious seeds is real. Always err on the side of caution and pulse less than you think you need to.
Vremi Fine Mesh Sieve for Final Seed Rinsing
No matter which extraction method you choose, the final step before drying is a thorough rinse. A high-quality, fine mesh sieve is an indispensable tool for this. Don’t use a standard kitchen colander; the holes are too big, and you’ll wash your future garden right down the drain.
Pour your fermented and separated seed slurry into the sieve and run cool water over it. Use your fingers to gently rub the seeds against the mesh. This motion helps scrub off any remaining pulp or remnants of the gelatinous sac, leaving you with perfectly clean seeds.
A sturdy sieve with a strong frame will last for years and is useful for countless other kitchen and farm tasks, from sifting flour to rinsing quinoa. Investing in a good one, like those from Vremi or similar brands, ensures you don’t lose your hard-won seeds in the final moments of the process.
Drying and Storing Seeds for Next Season
Properly drying your cleaned seeds is just as important as extracting them. Wet seeds will mold in storage and fail to germinate. The best practice is to spread them in a single layer on a ceramic plate, a coffee filter, or a screen. Avoid paper towels, as the seeds will stick like glue once they dry.
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Place them in a well-ventilated area away from direct sunlight for one to two weeks, or until they are completely dry and brittle. You can test for dryness by trying to bend a seed; if it snaps, it’s ready.
Once dry, store your seeds in a cool, dark, and dry location. Paper envelopes, small glass jars, or plastic bags all work well. The most critical part of storage is labeling. Be sure to write the tomato variety and the year of harvest on every single packet. There is nothing more frustrating than planting "mystery tomatoes" come springtime.
Choosing the right tool depends entirely on your scale and goals, from a simple sieve to a heavy-duty press. By saving your own seeds, you’re doing more than just preparing for the next season. You are becoming a steward of unique heirloom genetics, adapting plants to your specific soil and climate, and building a more resilient and personal connection to the food you grow.
