Saving seeds can help gardeners save money,
grow better crops and become more self-reliant. Learn all about saving
vegetable seeds.
By Roberta Bailey
December 2012/January 2013
When you save your own seeds, you are joining a chain of farmers,
gardeners and seed savers that dates back to the Stone Age. All domestic
crops were once wild plants that early humans selected to feed
themselves or, later, their livestock. Today, gardeners save seeds for
many reasons.
Photo By Dwight Kuhn
1. Money Savings. Every time you buy a seed variety,
you invest in your future. For example, I just bought some expensive
‘Midori Giant’ soybean seed, and I feel better about the high price tag
because I know I’ll have the variety as long as I continue saving seeds
from my plants. (With soybeans, you simply let the last picking dry on
the plant and you have next year’s seed.)
2. Seed Security.
Hundreds of excellent plant varieties have been discontinued as big
corporations have consolidated the seed industry and focused on more
profitable hybrids. If you save your own seed, however, you
control the supply. I save seed for ‘Miragreen’ and ‘Blizzard’ peas,
‘Lutz Green Leaf’ beets, and ‘Scarlet Keeper’ carrots because these
varieties all grow well here in Maine but have become difficult to find
in seed catalogs.
3. Regional Adaptation. This is
where saving vegetable seeds can get exciting. Most commercially
available seed has been selected because it performs fairly well across
the entire country if given synthetic fertilizers. (Several
companies now offer seeds selected specifically to perform well in
organic conditions — but this isn’t the norm.) When you save seed from
the best-performing plants grown on your own land and with your unique
cultural conditions, you gradually develop varieties that are better
adapted to your soil, climate and growing practices.
4. Consistent Quality. To
keep their prices competitive when producing open-pollinated (OP) seed
crops, large seed suppliers rarely “rogue” the fields to pull out
inferior or off-type plants. This means the OP seed they sell to retail
seed companies may have a lot of off-types in it. For gardeners and
market farmers, that translates to loss of production per foot of row.
To avoid this loss, either save your own seed, or pay more for premium
seed produced by small, organic producers whose seeds cost more because
they properly select for uniformity and rogue out any plants that aren’t
true to type. (See our Seed Company Directory for
profiles of more than 100 seed companies, some of which do their own
variety trials and follow careful selection practices.)
5. The Joy of Learning. Some
people are drawn to the science of seed saving because they want to
take their gardening experience to a higher level. The more seeds you
save, the more you inevitably learn about botany and the plant kingdom.
6. Explore Heirloom Varieties. Some folks like to grow
heirloom varieties because doing so gives them a connection to our
garden heritage. Others choose non-hybrid seeds because they don’t want
to support the industrial agriculture system that increasingly controls
our food supply. Plus, some older, open-pollinated varieties produce
more nutritious crops than do modern hybrids bred mostly for high yields
and long shelf life.
7. Influence Crop Traits. Gene pools are incredibly
elastic. By carefully observing your plants, you can save seed from
those plants that best meet your needs for germination, ripening time,
yield, specific fruit shape, flavor, storage qualities, less seediness,
better disease resistance, bloom color, or other unique traits within
the variety. With time, most of the plants you grow will have your
desired traits. For instance, I obtained ‘Elka,’ a Slovakian poppy seed
traditionally used before walnuts became commercially available. The
Slovaks saved seeds from only the seed heads with the smallest vents —
the little holes below the cap that allow the precious nutty seeds to
disperse — until eventually their variety had all unvented heads that
shed no seed. When I first grew ‘Elka,’ only two-thirds of its seed
heads had no open vents. I started selectively saving seed only from the
poppy heads that had closed vents. Within three years, all of my plants
had seed heads with no open vents, and I didn’t lose any more seed.
Know Your Seed-Saving Goals
Think
ahead and create specific goals as you save seed. If you’re saving an
heirloom, are you trying to keep it true to its original traits? Are
your seed-saving practices changing the plant? If you save seed from the
first lettuce plant to bolt, you are selecting for lettuce that bolts
early — not a good trait in lettuce. If you save seed from your tomato
plants that did not succumb to late blight, you are selecting to improve
that variety’s disease resistance.
When I started growing ‘Czech
Black’ hot peppers, the fruits varied greatly in shape, from fat
peppers with large seed cavities to slender ones with almost no seed.
Most were medium-sized fruits that came to a blunt point. If I’d just
wanted to save the most seeds with the least amount of work, I could
have saved the fat peppers that had the most seeds. But I was trying to
produce a seed crop to sell and it needed to be true to the plant type,
so I saved seed from the medium-sized peppers growing on the sturdiest,
highest-yielding plants. After four years, the peppers were uniform in
fruit size and heat — plus, the plants were sturdier and more
productive.
Seed-Saving Tips
You should always choose open-pollinated varieties
for seed saving. Open-pollinated (OP) plants are non-hybrid plants with
seed that is true generation after generation. A hybrid is the
offspring of a cross between two parent varieties. Its seed will not be
true to type if saved and replanted. Hybrid varieties will be labeled in
catalogs and on seed packets as “Hybrid” or “F1.”
There are two main types of open-pollinated varieties: self-pollinating
and cross-pollinating. The easiest crops to save seed from are peas, beans, tomatoes and peppers, all of which are self-pollinating crops. Self-pollinating plants
pollinate themselves, usually before the flowers open. The seed that
you save from these plants and grow the next year will yield plants just
like the original ones. To maintain the plant’s genetic diversity, you
should ideally grow and save seed from 20 or more plants. If you save
seed from only one self-pollinating plant, the plant will reproduce, but
you are narrowing its genetic diversity.
Unlike self-pollinating plants, cross-pollinating plants, such as brassicas, corn, carrots, beets, squash, cucumbers and melons,
must receive pollen (usually via wind or insects) from other plants of
the same variety to produce viable, true-to-type seed. Cross-pollinating
seed crops need to be isolated from other varieties of the same
species. The simplest solution is to grow only one variety of a given
species. You can save seeds from just one or two plants, but to maintain
long-term health and vigor, you should buy new seed every few years
unless you can collect from much larger populations than the 20 plants
recommended for self-pollinators. Grow a minimum of 50 to 100 plants,
and at least 200 for corn. Keep an eye out for plants that seem off-type
(like my fat ‘Czech Black’ peppers), and don’t include them when you
collect seed. (Go to the Seed Savers Exchange’s Planting and Seed Saving Instructions for details on isolation distances and other specifics for dozens of crops.)
To
save seed from legumes, such as self-pollinating peas and beans, simply
allow some pods to dry on the plant. Save the leftover seed at the end
of your picking stage, or cordon off a section of the row. As the plants
will need to be in the garden longer than the “green” stage, allow for
this in your garden plan. Different varieties grown right next to each
other will have minimal or no cross-pollination, but ideally you should
separate varieties by 20 feet to avoid rare cases of cross-pollination.
If
you want to save seeds for several varieties of a cross-pollinated crop
in the same garden, a physical barrier such as a screen cage or row
cover can keep the seed crops isolated. I use wire hoops and row covers
on some seed crops to keep them pure. I also alternate years, growing
one variety one year and another the next. My ‘Lutz’ beet seed crop
produced enough seed to last five to 10 years, leaving me free to
produce other beet seed crops in the interim.
If you’re growing a
crop for seed, think ahead of time about spacing. Tomato, pepper or bean
plants don’t need more space as seed crops, but biennial beets and
carrots do because of how large the seed-producing plants will be in
their second year. Beet plants that I set out the second year from roots
I stored in my root cellar grew to 3-foot-wide plants. As large seed
crops grow, also think about feeding them. I give my seed crops extra
nitrogen and minerals during seed production.
When saving seeds, good record keeping is essential. Label your
seedlings, your planted rows and your stored seed. I keep a map as a
backup record, too, in case a critter makes off with a row marker or
weather washes away a label’s ink.
If you spot an interesting off-type, you can save seed and grow it
out the next year to see what happens. You may be on your way to
creating a new variety — or at least embarking on a little botanical
adventure.
Seed crops are harvested at different times than food
crops. I often tie off an entire section of a row with ribbon and save
all of the seed from that section, leaving it long after the rest of the
plants have been removed. Watch plants that produce pods; when the pods
are dry but not shattering, they are ready to harvest. I find
handpicking pea pods easiest, at least on a small scale. I harvest
entire bean and soybean plants and hang them until they are completely
dry, then thresh them in a clean bucket. Blow off the chaff using wind
or a fan, or sift it through a screen.
Flower heads are usually
hand-harvested as they dry. Morning glories and vine crops often mature
their bottom seed husks or pods first and progress up the vine as the
season goes on. Spread the seed heads out to dry, rub them back and
forth between your hands to free the seed, and then winnow or screen
away most of the chaff.
Tomatoes, peppers, eggplant and cucumbers
can be picked as individual fruit. Let the fruit become very ripe to
overripe to ensure mature seed. Leave cucumbers on the vine until they
mature past the yellow blimp stage. Eggplant should be starting to brown
and rot. Tomatoes and peppers need to be very ripe or just past ripe,
or picked close to ripe, and then stored until fully ripe to overripe (a
process called “after-ripening”).
Tomatoes and cucumbers are
“wet” seeds: They have a gel sac around each seed that hinders
germination and, in rare cases, can harbor disease. They need to be
soaked to remove the gel sac. Squeeze the tomatoes or scrape the seed
from the tomato cavities into a labeled container, covering it to keep
out flies. Allow the seed to soak for 24 to 48 hours. Add more water
after soaking. The good seed will sink while the immature seed will
float along with the pulp. Pour off the pulp. Add more water and
continue to pour off the pulp until all that remains is clean seed on
the bottom. Pour this seed into a strainer to drain off all liquid, and
then spread the seeds out to dry in a cool, airy place. I spread my seed
on newspaper. Paper plates also work, but paper towels are too fibrous
and will stick to the seeds. Label the newspaper or paper plate with the
variety name. When the tomato seed is half-dried, stir it to make it
less clumpy. After seeds have completely dried, break up any remaining
seed clumps and pack the seeds for storage.
To save eggplant seed, grate the fruit or put it through a food
processor, and then add it to water. The seed will sink and the pulp
will float.
Peppers are even simpler: Just cut fruits open and remove
and dry the seed.
For much more on seed-saving procedures for different
crops, see the books Saving Seeds by Marc Rogers and The Complete Guide to Saving Seeds by Robert and Cheryl Moore Gough.
Store dried seed in glass jars, plastic bags or paper envelopes.
Glass is best, as it does not allow moisture into the seed. Store seeds
in a cool, dry place — ideally at less than 50 degrees Fahrenheit and at
a relative humidity level of less than 50 percent. In general, for
every 10 degrees colder the storage conditions, seed longevity doubles,
so it’s best to keep seed in a covered container in a refrigerator. As
long as the seed is very dry, it will last longest if you keep it in a
freezer. All seed should be dried to a brittle state, ideally to less
than 14 percent moisture (the level at which ice crystals won’t form on
seeds if stored in the freezer). When you’re ready to use seeds that
have been in freezer storage, allow the storage jar to come to room
temperature before opening it to avoid condensation on the seed.
Different
types of seed have different life spans. Many retain good germination
for only a few years, while others stay viable for an impressively long
time. Some classic one-year wonders are parsley, parsnip and onions.
They may last a second year, but germination and vigor will be much
lower. In general, pepper seeds maintain good germination rates for two
years; legumes and carrots, three years; squash, beet, eggplant, tomato
and brassicas, four years; cucumber, five years; and lettuce, six years.
Exact storage conditions affect longevity greatly, however, and seeds
from some of these crops can last 10 years or more.
You can do a
simple germination test by loosely rolling a few dozen seeds in a moist,
white paper towel, keeping it covered with plastic wrap and slightly
moist to sprout the seed. Most seed will sprout in four to 28 days. If
it takes longer or if less than 50 percent of the seeds sprout, you
should probably toss the seeds.
If you end up with more seed than
you can use, find a local seed swap. You can trade or share your seed,
and you’ll come home with new, locally adapted seed varieties as well as
a head likely spinning from all of the knowledge you’ve gleaned from
fellow gardeners who share a love of growing great food.
Organize a seed swap near you, and have MOTHER EARTH NEWS help you get the word out.
Saving Seeds to Sell
If you’re interested in selling seeds
that you produce, contact a seed company’s purchaser to inquire about
which crops the company needs grown. Specify your areas of expertise.
Most seed companies contract for specific strains or varieties one to
three years ahead of time.
If you pitch your favorite variety to a
seed company, the representatives will want a seed sample so they can
trial or observe it for a year or two. Then, if they’re interested, they
will contract with you. Some seed companies have tight legal contracts
and deadlines. Some use just verbal commitments, however, and you can
provide a contract if you want more insurance in such cases.
Prices
paid vary with each seed company, and certified organic seed commands
higher prices. My experience selling organic seed has been the
following: tomato seed at $360 per pound; peppers at $40 per ounce;
flowers from $10 per gram for tiny seed to $50 per ounce; hardy, rare
rice at $10 per ounce; peas and beans at $5 per pound.
A small
seed company may only need a few ounces of seed. Larger companies rarely
deal in small lots, requiring 1 to 20 pounds of small seed, such as
that of tomatoes. Inquire upfront about amounts needed.
The Organic Seed Alliance provides education and advisory services for seed savers and is an excellent resource.
Seed Saving Made Simple
Always save from open-pollinated (OP) varieties, not hybrids. There are two main types of OP crops:
• Self-pollinating (easiest to save), including peas, beans, tomatoes and peppers
• Cross-pollinating (require isolation), including brassicas, corn, carrots, beets, squash, cucumbers and melons