It's sustainable, lowers your carbon footprint, and saves you money.
Radish are easy to seed save. Instead of harvesting your radish to eat, leave a few alone and let them grow. They eventually will sprout stems and seed pods. Radishes can get pretty big (3 feet tall) if allowed to grow.
Let the seed pods dry out and then harvest a stem with pods. Here is a typical bunch of branches, stems, and seed pods.
Crack open the seed pod.
You can see the little round seeds in the pod. Separate the seeds from the pod.
In a little time you can make a lot of seeds for next year's planting.
Put the seeds in a ventilated, water proof container and put it in the refrigerator until you are ready to plant.
I seed save when I am taking a break sitting on the porch enjoying the front flower garden.
Seed saving radish is an easy and enjoyable activity !