Category Archives: sustainable living

Fall gardening basics – part 2 – seed saving

By Nancy Pollard, Horticulture Educator, with Steven G. Canavis  University of Illinois Extension Master Gardener alumnus

Why collect seed?

Collecting and sowing your own seeds can be a fun and gratifying experience for the home gardener.  At first, the details may seem overwhelming, yet as you gain experience, and are rewarded with new seedlings, you may find yourself inspecting your flowers closely in anticipation, and seed saving could become second nature to you.

Home gardeners can collect their own seeds from their own plants.  Information that is normally found on commercial seed packets can be located in books or websites.  While your choices are limited by how many plants grow in a particular garden area, joining a seed exchange group increases the availability of saved seed for your future planting.  The joyful thought of watching seeds magically sprout next year, or the great disappointment if they fail, encourages us to look into best practices for collecting and storing plant seeds.

How to Collect Seed

The first step is to choose healthy plants with high quality seedpods and fruits for seed collection.  Healthy plants show vigorous growth, exhibit resistance to pests and diseases, produce good quality fruit, and produce high yields. As the chosen plants finish flowering, look for swelling seedpods or ripening fruit.  Wait until they are fully mature.  It is important to collect only fully mature or ripened seed.  Sometimes, nearly mature seeds may ripen off the plant, if they remain in their seedpods.  If picked too early, the embryo will not survive the drying out process, or if picked too late, the wind may blow away the seed.

Fine, nylon-mesh bags work universally well for collecting seeds and seed structures.  Paper bags work well for seeds, cloth bags for panicles or dry fruit, and open baskets for fleshy fruit but be sure not to squash the fruit.  Do not let seeds become hot or moldy.

Seed propagation preserves and promotes genetic diversity. The result of the sexual union of flower parts (male and female).  Each contains an embryo, a packet of energy and a protective coating.  Some annual flowers and vegetables have been developed to come as true to type as possible from seed, others will result in a wider variety of offspring types. Plants reproduce either by seed or by vegetative parts.  Asexual or vegetative propagation duplicates exact copies or clones of a given plant resulting in no genetic variation.  Vegetative propagation includes layering, division, cuttings, grafting, budding and tissue culture.

Dry seed pods   With dry seed pods, extract the ripe seeds by hanging them upside down over a paper bag in a shaded, dry, airy place and wait for the seeds to fall.  An occasional gentle tap will help. Cut clustered seed heads such as those of marigolds whole and lay on a newspaper to dry.  Whenever you harvest your own seed, remove as much of the chaff and other vegetable material as possible before storing.  This material, if sown along with the seed, tends to rot and may encourage fungal diseases.

Moist fruit   For moist fruit, such as ripe tomato or cucumber, the seed is surrounded by a sticky, gelatinous substance called mucilage.  When the fruit is fully colored and ripe, scoop out these seeds and wash them in a fine strainer under running water to remove the mucilage.  Allow them to dry in the shade.

If the mucilage is difficult to dislodge, with a gloved hand gently rub the seed against the wire mesh screen of the sieve.  Once the mucilage is removed, place the seeds to dry in a single layer on absorbent newspaper in the shade.  Turn over so both sides dry or dry both sides at the same time by suspending the seed between layers of mosquito netting.  Label batches of seed to keep track of what is drying where.

How to Store Seed

Clean & Dry  Only clean and well-dried seed should be stored.  The two deadly enemies of stored seed are warmth and moisture.  So, inspect the seed one last time before it is stored. Is it the very best you could collect?  Is it clean, dry, and free of chaff and other debris?  To keep stored seeds cool and dry, store them in clean, airtight containers or in small paper bags in the bottom drawer of your refrigerator.  Paper bags, unlike plastic, allow the moisture to escape from the seed, so mold and rot is less likely.  The cool refrigerator temperature slows down the natural respiration and deterioration of the seed.  Clearly label the containers with the name of the plant and the date and place of its collection.

Cool & Dry   How long seeds last in storage depends on the type and quality of seed saved and the storage conditions.  Some deterioration is inevitable.  Aim to use all stored seed next year or within two or three seasons from the time of collection, as sprouting or germination rates will go down with time.  In general, the lower the humidity and temperature in storage, the longer the viability of the stored seed.

Reference:  Manual of Seed Handling in Gene Banks, Biodiversity International 2006

Find out more about the University of Illinois Extension service at


Seed exchange reopens in new location!

After a long summer of negotiation, the South Side Seed Exchange is reopening just in time for last minute fall seed swapping. The exchange will be housed in S.H.o.P. at 5638 S. Woodlawn Ave. in Hyde Park through next summer. S.H.o.P., short for the Southside Hub of Production, is a collective of like-minded visual artists, educators, gardeners, musicians, writers, and lots of other folks who are trying to create a “whole culture” environment in a turn-of-the-century mini-mansion that has been leased to us by the Unitarian Church for one year.

The exchange has many fall planting seeds available, including almost all of those mentioned by Illinois Extension service educator James Theuri in the article that follows this post (we are out of mustard green seed for now).

To learn more about S.H.o.P., visit the website or just stop by this Saturday, Oct. 1, any time after 4 p.m. for an open house featuring the work of many of the visual artists who will be exhibiting at S.H.o.P. over the course of the year.

Seed purchase sharing added to the blog

Seeds for everybody!

We’ve added a page to our blog to give people a space where they can talk about ordering seed together. While we aspire to a seed network free of a profit motive, we also want to participate in an inclusive community, which means making things easier for everybody by working together. Also, we just don’t have the gadgillion seeds we’d need to meet everyone’s needs!

So, you can link to the “group buys!” page above (or here) and start or continue a conversation about what kinds of seeds you might go in on. As an incentive to get the network going, we’re able to offer a cost match for the first $25 worth of seeds folks go in on, meaning you save money a couple of different ways. We will work out logistics and the specifics of seed orders, as they seem to coalesce, off-blog (most likely via an online group). In the meanwhile, all questions can be directed to and any comments can be posted here.

Have at it!

(The photo above is from the mural “Childhood is Without Prejudice” by Will Walker.)

Seed swapping on the net

The universe of folks swapping seeds and publicizing their local seed swapping efforts online is pretty large. Some, like the Philadelphia Seed Exchange, are simply a great example to us as we get our own efforts off the ground. Many, however, are places where you can get involved in seed exchange beyond our humble efforts.

Mas du Diable is a good example of a site that offers individual seed exchange but is also a super-inspirational place to check out generally. The site features the author’s four-seasons kitchen and seed saving garden in a dramatic landscape in France. The blogroll is definitely worth checking out, and the gardening log is really instructional in terms of its simplicity and usefulness.

"Mas du Diable" from the multitalented blogger Laura Hudson - go to the link on the Mas du Diable site to see more inspiring painting!

Bifurcated Carrots is a treat in a different way. There is also a lot here about the author’s space, but what attracted us was a pretty compelling essay about the need for an online seed network, along with a couple of other features. Like Mas du Diable, the author also swaps seeds via the site, but suggests browsing the archives to get a sense of what is available and to send an email with requests. The next coolest swap-related item on the blog next to the essay is a great list of links to folks who have been inspired by it and become a part of an online network. Check them out!

The iVillage GardenWeb seed exchange is the inspiration for our approach. It’s simplicity seems to us to be the best way to get a whole bunch of people (we hope!) to start swapping seed with one another. There are lots of other trading categories listed on the site and plenty of other things to explore there, so be sure and browse, if you have it to spare.

Bifurcated Carrots takes the idea of seed exchange networking online to an important level; Kokopelli is also inspiring but in a somewhat different way. Their mission is to unite gardeners worldwide to share seeds with folks in Third World countries. It’s a truly worthy mission and a beautiful vision that just scratches the surface of what gardeners around the world could do if we work together.

We’d love to hear from you about websites that have inspired your seed saving and swapping efforts! There’s so much out there that we can undoubtedly learn from each other’s explorations.

Virtual swap added to the blog

We’ve looked at a whole bunch of online seed exchange methods and come up with what we think is the easiest and most swapper-friendly method for trading seed online. You’ll see a new tab above marked “swap here!” that will get you to the online swap page (or, lazybones, just click here). Please restrict comments on that post to swap offers and seed requests.