Over the decades, seed saving gardeners have maintained many of these heritage varieties but very few are commercially available. One reason is that selling such seeds isn’t very profitable – you can’t make much money with something that is widely available for free: most heritage and some modern varieties are ‘open pollinated’ so anyone is free to save the seeds for the next growing season. Contrast that with most of the varieties that you buy in a supermarket or on a farmers’ market. You could save the seeds, but even if they were to germinate, don’t expect the crop to look anything like the produce you initially bought. Most modern varieties are hybrids, which means their seeds are either sterile or the offspring are not ‘true to seed’.

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