Mary, one of our volunteers, emailed this lovely picture in August. She wrote: "I have begun seed saving from our Empty Common Garden and from things I have found in the trash such as this bonus of nigella/ love in a mist that I found yesterday. So far we have a nice collection: nigella, poppy, calendula, foxglove and columbine."
You can find useful information on saving seed online. "Seed can be saved from many trees, shrubs, perennials, aquatic plants, alpines, annuals, biennials, bulbous plants, ornamental grasses vegetables and herbs," states the RHS, which has an informative guide on seed collecting and storing. Click here to read more.