… for things you can plant, that need next to no looking after, that yield an edible crop, year after year.
Rhubarb would be an obvious one, I think. Both of us think we don’t like rhubarb, but it could just be we didn’t like it as children and haven’t properly revisited our opinion in adulthood. Then there’s the worry of the “poisonous” leaves – Wikipedia says it would take the average adult 5kg of disgusting bitter leaves to get a lethal dose.
Raspberry canes might be another? I think you’re supposed to cut them down at the end of the season, but I’m sure I remember some self-seeded ones in my grandfather’s garden that did nearly as well as the highly-attended-to ones in the fruit cage.
We do have an elder tree which yields lovely flowers for elderflower cordial around this sort of time each year. This year, I’m also planning to have a go at elderflower vodka as well for something tasty to last a little longer.
We’ve no room for any more trees, and we have far more shaded parts of our garden than sunny, because of all the trees around the edges.
We have a few seedlings that have been kindly donated this year, which is more than we have managed in the past. If we manage to get them past the highly dubious stage where the local slugs eat out all the growing shoots, that will be a minor miracle.