How to collect and save onion seeds from your garden

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Last year I collected cilantro seeds and they were a great success in my garden that this past Spring I made a commitment to myself that I would try to collect more seeds this season.  Though I wanted to get more I was able to collect seeds from my onions, jalapenos, and cilantro.  The jalapeno seeds were pretty easy I set some seeds aside on a paper towel while making some salsa.  After they appeared to be dry I threw them in a brown paper lunch bag.

For the onions once the florets (flower balls you see above) got real ugly and dry and I could see the black seeds emerging I placed them in a paper bag before the birds got to them.  I then put the bag on top of our kitchen cabinets and forgot about them for couple months.  Today I pulled the bag down and confirmed they definitely were dry.  To separate the seeds from the pods I broke apart (which happens easily) and placed the contents into a metal strainer.  I gently broken open any remaining pods and agitate the strainer.  This causes the small black seeds to move to the bottom, allowing the pods to float to the top and forcing many of the stems to fall through.

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I then skimmed off as many of the stems/pods as possible leaving and putting the seeds into a brown paper bag until I can get into town to buy some more manageably sized brown envelopes (recovering from Seattle snowstorm)

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After a few minutes of work I now have hundreds of onions seeds which I probably only have use for couple dozen.  Seed exchange anyone?

How to save onion seeds from the garden

In the past I have harvested seeds for cilantro which worked so well I have decided to try more this year. Now my gigantic onions are producing seed stalks and umbels are beginning to open seems like a good time to try harvesting my own onion seeds.

To save these seeds it is pretty simple, when the umbels have dried out and begin to open. At this time carefully cut them off (making sure that seeds do not fall) and place in a them in a cool dry location for 2-3 weeks. I prefer to put my harvest seeds in the refrigerator in a paper bag. It is a good idea for onions to cross pollinate so I will plan on buying some other onion seeds to mix with the ones I am harvesting to allow for cross pollination.

Onions take 100-120 days from seed to maturity, if you start from sets which you grow from the previous year can shave 3-4 weeks off that time. I could make my own onion sets by planting 30-40 seeds in a square foot area during late summer. After two months rake over the tops and let them turn brown and dry out then store them in a dry place until next spring.

My PC grow box will be empty 10 weeks before my last frost date so planning on starting my onion seeds in there moving them outside 4 weeks before the last frost.

If you want to learn more about saving seeds for onions or other vegetables be sure to check out International Seed Saving Institute which has great advice about saving seeds from dozens of different plants.

Harvesting seeds from the grocery store

There is more than one way to harvest seeds sure can grow your own but there is also another option. Use seeds someone else grew by buying them at a grocery store or farmers market.

Have you ever have bought potatoes, sweet potatoes or yams and noticed sprouts coming out of them, dig a hole and plant them in the ground and in a few weeks you may have your own potato plant. Not a fan of those, why not try garlic, ginger, onions, peanuts, avocados, dried beans, apples, tomatoes, peppers, or anything else you can imagine.

This year I am going to attempt potatoes and garlic, how about yourself?

Harvesting your own seeds


This past fall I made my first attempt to harvest my own seeds. If you can’t tell from the picture I chose cilantro (or coriander if you eat the seeds) and seem to be worth the minimal effort. Just as a warning, if the plant you are dealing with happens to be a hybrid (parents of different species) what you get the next year may not be the same as it was the previous year. In the end this could be disappointment or a pleasant surprise so the risk might be worth it. This next year I am planning letting some of my other vegetables finish going to seed to save a couple bucks but also the flowers don’t look half bad.

Saving money by saving seeds

Many people do not know that given the right care you can save a package of seeds for 3 years and depending on the variety possibly even longer.  When you want seeds to germinate you provide heat, moisture, and light. To prevent them from germinating you want to do the opposite by storing them in a cool, dry, and dark environment.

I happen to live in the humid Pacific Northwest so finding a dry location can be difficult, but I happen to have the perfect environment in my kitchen in my refrigerator.  Just thoroughly clean and dry a glass jar and drop in your seed packets and close the lid. If you happen to one or two of those silica packets lying around (those things you find in the toe when you put on new pair of sneakers) drop that in the bottom it will help soak up any moisture that may exist in the jar.  If moisture seems to appear inside your jar simply open the top and the dry environment will suck all the moisture out.

Empty glass jar $ 0.00
Silica packet $ 0.00
Packets of seeds $ 15.00

Total $ 15.00

Savings over 3 years $ 30.00
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