seed saving: why and how janet young, karen mills, cindywalczak, katie mcie, and donna starkweather
TRANSCRIPT
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Seed Saving: Why and How
Janet Young, Karen Mills, CindyWalczak, Katie McIe, and Donna Starkweather
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College ofAgriculture and Natural Resources
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Our Vision:
A healthier world through environmental stewardship.
Our Mission:
To support the University of Maryland Extension mission by educating residents about safe, effective & sustainable horticultural practices that build healthy gardens, landscapes, & communities.
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Seed Saving - Outline History/Why save seeds? Types of seeds Pollination challenges Steps to harvest, clean, and store
flower and vegetable seeds Longevity of saved seeds Resources, final thoughts
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History - US 150 years ago - no seed saving companies! 1854 - farmer (or gardener) exchange, on-
farm seed saving, and US PTO 1897-1924 – under USDA management 1.1 B
packets distributed each year 1866 – first commercial seed produced,
cabbage, Long Island NY 1945 – hybrid techniques led to growth of
regional seed companies Today – company consolidations: 10 seed
companies account for 67% of the global proprietary seed market.
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Benefits of Saving Seeds
Engage in the cycle of life Preserve heirloom varieties Encourage genetic diversity Save money
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Engage in the Cycle of Life
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Preserve heirloom varieties
Pretzel Bean - nutty flavor!
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Preserve heirloom varieties
Mouse Melon – cucumber and fava bean taste
from our Derwood Demo Garden
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Preserve heirloom varieties
All Heirloom Tomatoes!
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Encourage genetic diversity
The total number of genetic characteristics in the genetic makeup of a species.
More variation → greater adaptability
Selective breeding → monoculture http://en.wikipedia.org/wiki/File:Wheat.gif
http://en.wikipedia.org/wiki/File:Famine_memorial_dublin.jpg
Irish Potato Famine 1845
Entire crop cloned from one potato
“Lumper” variety susceptible to Phytophthora infestans
Almost entire crop destroyed; 1M people starved to death
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Save money !
Perhaps the most attractive of all!
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Types of Seeds :Can I save all seeds?
Heirloom: Good for seed saving
Open-pollinated seed varieties Over 50 years old Not the vegetables you usually see in grocery Some stores carry seeds & vegetables that are
specifically labeled “heirloom”
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Cherokee Purple
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Can I save all seeds?
Hybrid: Not reliable for saving
Bred for specific characteristics by crossing two varieties
Seeds germinate, but do not breed true to parents
Seeds from hybrids may produce plants whose taste, color, size, etc., may not be desirable 14
Better Boy
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What is Pollination?
The transfer of pollen from the anther
(on stamen) to the stigma
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Self pollination Cross pollination
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Anther: creates pollen
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Understanding Pollination
Pollination impacts seed quantity and quality
Optimum conditions for successful pollination are not the same for all plants
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Pollination Challenges Self pollination easiest: tomatoes, beans,
lettuce, peas Cross pollination – by wind, bird, or insect
harder: squash, cucumbers, okra, peppers, carrots, corn, radishes
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Pollination Control Techniques
If your plant requires wind, insects, or birds for pollination you can use:
Physical distance separation Growing only one variety for saving &
exchanging seeds with other seed savers Bagging & hand pollinating Cages to exclude bees & hand pollinating
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Calendula
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Saving Flower Seeds
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Harvesting Flower Seeds
Do not deadhead! Wait for petals to
fall off Seed head or pod
will be exposed
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Harvesting Flower Seeds Cut flower several
inches below seed head
Dry seed head in paper bag
Seeds will fall to the bottom
Can take 1 to 4 weeks
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Saving Vegetable Seeds
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Legume seeds
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When to Harvest Veggie Seeds Ideal time to harvest varies from plant to
plant Some seeds (e.g., melon) are ready to
harvest when fruit is ready to eat Other seeds (e.g., squash and cukes) should
be left on vine after you would normally eat them
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Cleaning Vegetable SeedsTwo types: dry seeds & wet seeds
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DRY
BeanBroccoliChiliesCornEggplantLettucePepper
WET
Berries Cucumber Malabar spinach Melon Pumpkin Squash Tomato
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Cleaning Dry SeedsSeparate seed from chaff by:
Winnowing in a gentle wind
Using two screens of varying mesh size
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Cleaning Wet Vegetable Seeds Most seeds: Place in mesh strainer and gently
wash with water; pat underneath strainer with towel
Some seeds: Must ferment first to remove germination-inhibiting substances, e.g., tomato, Malabar spinach.
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Cleaning Tomato SeedsPut seeds & pulp in bowl, add water
Let stand at room temp for 3-4 days; stir a few times a day
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Cleaning Tomato Seeds Pour off pulp & any dead seeds that float Good seeds sink to bottom & can be washed
in a strainer
Pulp and dead seeds Washed seeds
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Drying Wet Vegetable Seeds Pat bottom of strainer
with cloth towel Let dry a few hours Spread seeds on
plastic, glass or ceramic plate to dry (not paper or even waxed paper): use a non-sticking material
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Drying tomato seeds
See the LABEL!!
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Seed Drying Requirements
Spread seeds only 1 or 2 thick Dry in an airy, dry location, such as an
air-conditioned room Keep humidity between 20% to 40% Takes 2 weeks or more LABEL them!
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Always LABEL Your Seeds Seed type and date collected Special characteristics (Autumn Gold)
Seeds may
look alike
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Seed Storage Containers
Place seeds in individual paper envelopes, wax paper, or zip lock bags.
Label with variety name, collection date, even picture of plant in bloom.
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Seed Storage ContainersStore seed packets in larger containers, such as zip lock bags, screw-top jars, or accordion folders by month to plant.
Home Made Commercial
Spaghetti jarIce Cream Jar
Zip lock bag
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Storing Seeds in Origami Envelopes
http://www.carnivorousplants.org/seedbank/Envelope.htm
Envelopes don't need to be taped or glued.
Remember to always LABEL them!
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Where to Store Seeds
Good: Cool, dry, and dark place—closet or cupboard
Better: Airtight containers in refrigerator Best: Dry to 5 to 7% moisture content by
weight; store several degrees below freezing (not many of us can be this precise!)
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Problems With Stored Seeds 1 Temperature variation Moisture fluctuation
If weather is humid when drying, put desiccant (silica gel packet) in container with seeds, remove after 7 - 8 days
If after drying, see: Mold or mildew on seeds Moisture on inside of storage container Also use desiccant
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Problems With Stored Seeds 2 Insects
Freezing is safest Add diatomaceous earth (DE)
Animal pests (use tightly closed containers)
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How Long Will My Seeds Last?It depends… Long lived (> 5 years - in general) : Brussels sprouts,
cabbage, cauliflower, celery, cucumber, eggplant, lettuce, melon, radish, rutabaga, spinach, squash, and turnip
Medium lived (3-5 years - in general): Bean, beet, broccoli, carrot, leek, pea, pepper, pumpkin, and tomato
Shorter lived (1-2 years - in general) : Corn, onion, parsley, parsnip
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Germination Considerations
Germination rates will always decline over time
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How To Estimate Germination Rate
Place 25 seeds on wet paper towel
Cover with wet paper towel, roll
Place in plastic bag + holes → 75°
Count at day 6: 23/25 = 92% GR
Check daily: 1st count – day 7 2nd count – day 14
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Where to Find Heirloom Seeds
Existing local seed swaps (e.g., Washington Gardener Magazine Seed Exchange; MGs)
Your own seed circle of neighbors, friends Seed Savers Exchange – lists sources for open-
pollinated and heirloom seeds Seeds Trust – online store for heirloom seeds
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Resources on Seed Saving Ashworth, Suzanne. Seed to Seed Bubel, Nancy. The New Seed Starter’s Handbook Deppe, Carol. Breed Your Own Vegetable Varieties Rogers, Marc. Saving Seeds Turner, Carole. Seed Sowing and Saving Rowe, Jack. http://howtosaveseeds.com - Vegetable Seed
Saving Handbook
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Final Thoughts: 1
Check references to see how your seeds should be saved
To be sure your seeds breed true use heirloom varieties
Consider starting out with a self pollinating plant For cross pollinating plants grow one variety and
share with other seed savers, (and libraries!)
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Final Thoughts: 2
Select seeds from healthy and multiple plants, from those producing the best vegetables and flowers
Learn to recognize plant diseases since some can be transmitted in seeds
Learn what mature seeds look like for the plant seeds you wish to harvest
Remember to always LABEL your seed rows, drying plates, and seed containers
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Resources
Grow It! Eat It!http://www.extension.umd.edu/growit
We have all types of practical food gardening tips and information. Check out our popular blog!
Home and Garden Information Centerhttp://www.extension.umd.edu/hgic
Here you will find factsheets, photos, and videos. You can also subscribe to the free monthly e-newsletter.
We answer gardening questions 24/7…just click “Ask Maryland’s Garden Experts”
Maryland Master Gardener Programhttp://www.extension.umd.edu/mg
Consider becoming a trained MG volunteer!
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This program was brought to you by the Maryland Master Gardener Program
Montgomery CountyUniversity of Maryland Extension