At least 15 years ago I bought 'Plants for a Future' by Ken Fern and got the bug. I ordered lots. Many of them did not take to the soil/the climate or were horrible (yes, the berberis). What have I kept?
sweetshoot bamboo, a lovely spreading bush but can't be bothered with the shoots. Too much work and not really worth it.
strawberry tree: fruits edible but not wonderful. Unfortunately ready together with the real strawberries ....
turkish rocket: leaves edible but a bit rough for me.
landcress - fine and very hardy but I'm not keen personally.
good king henry - fine but my husband is happy growing perennial spinach.
pignut - edible but very small!
jam joe hollis - flourishes each year but we have never managed to dig up the tuber however hard we try.
oleaster - we found the fruit not edible really.
fuchsia - yes you can eat the fruit, but I'm not keen.
day lilies - flowers edible but not impressive. I put them in salads regularly, but nasturtiums are much nicer.
perennial lettuce - still going strong, yes it's a bit earlier than ordinary lettuce and no trouble.
We tried many more, the names of which I forgot by now. I remember we had several interesting tubers for quite a few years, but I let them go as well. We like our potatoes, swede, and so on. They're bigger!
My current favorites for edible ornamentals are pot marigolds - the lutein in them helps my eyesight (MD) and skin, and they're no trouble at all: once you have one you have thousands. Also nasturtiums, same reason.
That's it for now, I might see more when I walk round the garden tomorrow!
Annemieke Wigmore,
http://thoughtforfood-aw.blogspot.com