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Often, yes. Old seeds may still germinate, but the odds depend on the crop and how the seeds were stored. A packet date is a clue, not a universal expiration date. Test a small sample before relying on an old packet for a full planting.
How long do seeds stay viable?
Seed viability tends to decline over time, but there is no single expiration age that applies to every crop or packet. Cool, dry storage can help preserve seeds; warmth and humidity can shorten their useful life.
University of Vermont Extension’s 2026 guidance estimates that tomato and kale seeds are usually viable for about four years, while corn and pepper seeds are usually viable for about two. These are estimates, not guarantees. University of Illinois Extension’s 2023 guidance places several crops in a four-to-five-year range under suitable storage and notes that vigor may decline before germination stops. The estimates differ because crop, storage, and guidance assumptions vary.
Test an old seed packet before planting
A paper-towel test gives a practical household estimate of the share of seeds that sprout. You need a few seeds, a paper towel, water, and a sealable bag; a specialized test kit is not required.
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Burpee SuperSeed 36-Cell Reusable Seed Starting Tray for Indoor Seedlings
- EASIER SEED STARTING: Our Burpee SuperSeed tray with 36 flexible pop-out cells is designed to simplify indoor seed starting for all your favorite vegetables, flowers and herbs. Just add seed starting mix, seeds, water and light to get growing! Rows are labeled alphanumerically for seedling identification with included Plant-o-Gram diagram. Tray dimensions: 11.5" x 10-3/8" x 2-1/4"
- SMARTER WATERING SYSTEM: Molded corner slots in each cell improve drainage and soil aeration to set your seeds up for germination success. Deep channels in the watering tray draw excess away from the cells, while the raised perimeter edge keeps water contained in the tray - no spills! Seed tray side handles make it easy to lift and pour off excess water or check seedlings daily.
- SIMPLER TRANSPLANTING: Soft food-grade silicone cells cradle seedlings and gently flex to pop out when it’s time to transplant into your outdoor garden! This system is specially designed to reduce stress on your seedlings, so you don't damage their roots. After transplanting, trays are easy to clean and reuse or simply store for next growing season. Top shelf dishwasher safe.
- SEED STARTER TIP: Many favorite vegetables, including peppers and tomatoes, must be started indoors before warmer weather arrives. Start pepper seeds 8-10 weeks before your area’s average last frost date, and tomato seeds 6-8 weeks before last frost. Check your Burpee seed packets for instructions on when and how to plant any of your herb, flower and vegetable seeds.
- 100% GUARANTEED: Burpee is committed to the success of all gardeners. We treat each order with care to ensure healthy seeds, plants, soil mixes and gardening supplies are packaged and sent in excellent condition. If you are unsatisfied with your purchase, we aim to make it right!
- Choose a sample. For a quick home check, Vermont Extension describes testing about 10 seeds. For a more informative estimate, Iowa State University Extension recommends at least 20 randomly selected seeds; 50 is better and 100 is best.
- Prepare the towel. Wet a paper towel, then squeeze out excess water so it is moist but not dripping.
- Arrange and enclose the seeds. Place the seeds on the towel, fold it around them, and put it in a sealable bag.
- Label and wait. Write the crop and start date on the bag. Keep it warm and the towel moist. Check around the expected germination time on the packet.
- Count and calculate. Count seeds once a root or cotyledon emerges. Divide the number that sprouted by the number tested, then multiply by 100 for the estimated germination percentage. For example, 7 sprouts from 10 seeds is 70%.
This is an estimate, not a laboratory-grade viability test. If you want to plant seeds that sprout in the towel, handle them carefully: their delicate roots can be damaged during transfer.
Decide whether to plant, sow extra, or replace the packet
- Strong test result: A high share of seeds sprouted, so planting is reasonable. Germination does not guarantee strong seedlings, however; vigor can decline even when seeds still sprout.
- Mixed result: You can sow extra seeds to compensate for a lower germination rate, particularly where thinning or extra seedlings are manageable.
- Low result: Vermont Extension suggests considering new seed if fewer than half the tested seeds germinate. Replacing the packet may be more dependable than relying on sparse or uneven emergence.
Prioritize testing packets of short-lived crops and seeds that spent time in warm or humid conditions. Treat the result as applying to the tested sample, not as a guarantee that every seed in the packet will perform identically.
Rank #2
Sprouting Jar Kit - 2 Wide-Mouth Mason Jars with Stand and Sprout Lids
- GROW HEALTHY GREENS EASILY-Our Sprouting kits make it easy to grow a variety of fresh, healthy sprouts right in your kitchen. Ideal for adding nutritious, crunchy greens to soups, salads and sandwiches. This kit makes sprouting not just a health choice but a fun hobby. Plus, it's an affordable way to enhance your diet.
- COMPLETE SPROUTING KIT: Our Zestigreens Sprouting Kit is designed to make sprouting at home effortless and enjoyable. With 12 keys components, including 2 x Large 32 Oz Glass jars, 2 superior screen sprout lids, 1 green onion regrower lid, 1 stainless steel stand, 1 drip tray, 2 blackout sleeves and color instructions. (Seeds not Included)
- INNOVATIVE GREEN ONION REGROWER-Transform your kitchen scraps into a thriving green onion garden. Our unique jar-based hydroponic system lets you regrow leftover green onions. Simply place the cut onions in the special lid and set in water. Harvest fresh greens easily and watch them grow back!
- GROW ANY SEEDS AND BEANS! Our metal mesh screens are small enough to hold a wide variety of seeds, great for sprouting broccoli, alfafa, radish sprouts, mung beans, soybeans and other seeds of your choice!
- IDEAL FOR BEGINNERS & GIFTS-Whether you're a sprouting novice or looking to give this as a gift, this kit is perfect. The dual jars allow for growing multiple sprout varieties simultaneously or continuous harvesting. It's an excellent gift for kids and adults, fostering interest in agriculture, biology, and home gardening.
Store leftover seeds to protect viability
Keep unused seeds cool, dark, and dry. A sealed glass jar or metal container can help protect packets from moisture. If you store seeds in a refrigerator, put them in an airtight container to limit exposure to humidity. An ordinary household container can be sufficient; a special seed-storage product is not essential.
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Bestseller No. 5
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HOME GROWN 15 Herb Seed Variety Kit, 4300+ Seeds, Culinary Herb Kit
- 15 Herb Seeds Variety Pack – 5100 Seeds Included: Start your own herb garden with this all-in-one heirloom herbs seeds kit. Includes Genovese Basil, Sweet Basil, Italian Oregano, Rosemary, Thyme, Cilantro, Dill, Mint, Sage, Lavender, Chives, Garlic Chives, Parsley, Chervil, and Scallions. Each herb seed packet is USA-sourced and tested for high germination. Grow these herb garden seeds in your backyard, windowsill, raised beds, or pots for fresh flavors all season long.
- Herb Seeds for Hydroponic Garden and Indoor Pots: These herb seeds for planting indoors thrive in hydroponic systems, AeroGarden, kitchen windowsill planters, or traditional soil. Perfect herbal seeds for apartment dwellers and urban gardeners short on outdoor space. Grow fresh herbs year-round in containers as small as 4 inches. Ideal seeds for planting herbs for renters, condo owners, and city gardeners who want homegrown flavor without a backyard.
- Perfect Christmas Gift for Gardeners & Home Chefs: This herb seed starter kit makes a thoughtful Christmas gift for mom, dad, or anyone who loves fresh ingredients. Ideal for Mother’s Day, Father’s Day, housewarmings, birthdays, and stocking stuffers. Beautifully packaged in a resealable mylar bag—ready to gift. Give fresh rosemary for holiday roasts, mint for Christmas cocktails, and sage for Thanksgiving stuffing. A meaningful gardening gift that keeps growing all year.
- Non-GMO Heirloom Herb Seeds – High Germination & Beginner-Friendly: Every seed is 100% non-GMO and heirloom, save seeds season after season for continuous harvests. Germination rates above 85% mean even first-time gardeners see results in 7-14 days. These easy herbs for beginners to grow need no special equipment, just soil, water, and sunlight. Stop paying $3-5 per bunch at the grocery store when you can grow unlimited fresh herbs for pennies. Perfect for budget-conscious families.
- Grow Culinary Herb Seeds for Cooking, Teas, Crafts & Teaching Kids: These herbs aren’t just for cooking—brew fresh mint tea, dry lavender for sachets, make dill pickles from scratch, or use rosemary in homemade skincare. Teach children where food comes from with hands-on garden projects perfect for homeschool families and classrooms. Fresh herbs also make stunning kitchen décor in mason jars or hanging planters. Ideal for foodies, wellness enthusiasts, and parents seeking screen-free activities.
Rank #4
Bonviee 5-Pack Seed Starter Trays, Humidity Dome, Base, 12-Cell Tray, Green
- 【Keep an eye on your plant】: The only design in the market- High quality clear plastic trays of this seed grow kit make it easier to observe your plants without interrupting the process.
- 【Total control】: Adjustable vents of this seed trays allow you to regulate the temperature and humidity of your seedling environment, so you have total control over the germination process.
- 【Perfect for the heat mat】: With its excellent resistance to high and low temperature, these seedling trays are strong enough to be used on a heat mat and no-worry melting.
- 【Perfect size for large seed】: 1.5 inch square for each cell makes these seed trays are suitable for large seeds, such as potatoes,tomates,perpers, eggplants and so on. 6 trays equivalent to a 1020 flat.
- 【Package include】5 x Seed Tray, 5 x Watertight Base Tray, 5 x Humidity Dome, 10 x Plant Labels (A must have for seedling).
Rank #3
HQLDMYGS Smart Germination Kit (Includes Filters & Tweezers)-8 Compartments
- Function: The loose-fit lid creates a stable, humid environment that promotes fast germination.Easy to open, inspect, and reuse.Reusable seed germination tool
- Designed for up to 8 seed varieties:Designed with 8 clearly marked compartments to organize up to 8 seed varieties
- Cleaner and more controlled than paper towel methods:Ditch cotton balls and paper towels; this clean soil-free setup keeps seeds dry while maintaining optimal humidity for fast, healthy sprouting
- Reusable Materials:Easy to open, inspect, and reuse.reusable for multiple growing seasons; lightweight, easy to clean, and eco-conscious.
- Package Includes: 1Set of smart germination kit, 5Pcs filters, with tweezers
Sources
- University of Vermont Extension, “Can Old Seeds Still Grow?” (January 16, 2026)
- University of Illinois Extension, “Are my seeds still good? Testing seed germination” (January 20, 2023)
- Iowa State University Extension and Outreach, “How to Store Seeds and Test Germination Rates” (reviewed December 2023)
- University of Illinois Extension, “Is it okay to save unused seeds for the following year?” (December 1, 2022)
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
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