Harvest Annual Seeds For Next Season
I get true satisfaction from growing plants in my gardens from the seeds I harvested the previous year from my own favorite annuals - and biannuals, like my Sweet Williams. One package of seeds, years ago, and I still grow their offspring in my gardens each year. It's fun to see what you can do in the dirt.
For many years I have harvested seeds from my favorite annuals in the fall. The following spring I plant them in my gardens. I usually get a very good crop, so I know this method really works. It saves a little money, but the reason I do it is for the satisfaction it gives me to grow the plants from their ancestors each year.
Some varieties of annuals are easier to work with than others. It usually has more to do with the size of the seeds for a successful "harvest", but most all annuals lend themselves to a natural "replanting" process that mother nature designed right into them.
I found that the easiest flowers to harvest seeds from are marigolds. This I discovered about 35 years ago in my first garden. I had beautiful miniature multi-colored marigolds in every shade of yellow and orange with streaks of red. I had planted them from packaged seeds I purchased from a popular seed company.
Throughout that summer I removed the dead flowers, or deadheaded them. I might have learned that from my mother, but I don't remember exactly. The dead flowers simply looked undesirable and I was cleaning the plants up. I noticed the marigold seeds clustered in the base of the flower. I didn't remember learning this from my high-school biology class. We had spent more time on the animal kingdom, I recall.
These marigold seeds "called me" to save them, plant them, and let them live again. So I put them into envelopes and planted them the following spring. It worked wonderfully and I've done this many years since. I often makeup pots for my deck by sprinkling marigold seeds liberally over potting soil and just water them.
Process for Harvesting Annual Seeds for Planting the Following Season
Wait until the flower has lost it's color and is practically dried out - on the plant if possible
Trim off the head (of the flower) and wait until it is completely dry
Shake or scratch the seeds from the stem, or base of the flower into an envelop or tray
Avoid mold by ensuring they dry out completely (away from the chipmunks!)
Store in a cool dry place until next spring. It is usually fine if the seeds are kept in freezing conditions, like a garage, as long as they are dry and don't mold. I would not let those seeds become warm, however, until I am ready to plant them.
Plant as usual in the spring or earlier inside with indoor lights or window light
Some Seeds May NOT Grow Next Season
Over the years I have tried this annual harvesting procedure with other plants. Some work well and some don't really work at all.
For instance, I once discovered WHITE marigolds I had never seen before. They were growing in containers at my brother's house in Toronto Canada. My sister-in-law said she found them in a local nursery. I had never seen them around my area. They looked a bit like carnations and really brightened up her window containers - her speciality.
I asked if I could take some of the "spent" flowers (dried blooms) home with me as an experiment. When I planted them later, the white marigolds did not produce any seedings.
The Internet was becoming useful back then for research so I think that is where I learned that white marigolds actually came from bleaching normal marigold seeds. They do not produce viable seeds themselves. They are essentially sterile. Oh well. Fooling with mother nature can be fun in a gardening sense. Professionals have been hybridizing and experimenting with plants forever. Practical botony would be a fun career for a young gardener-type, or is it horticulturalist?
I have some beautiful gardening reference guides on my shelves and I still learn a lot online. It's a ball being a gardener with Internet resources today. Plus I can share my own photographs too.
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