The only successful crop apart from raspberries is runner beans which I have grown for over 45 yrs and in very small space. I have a small raised bed that I pile up with leaf mould and compost and it produces a great crop every year, enough for two of us for 2 and half months. I do not bother with freezing any surplus as not the same. The only problem is getting them up to few inches high as voracious slugs will gobble them when small. So I sprout them in pots first on garden table in sheltered spot.
🦞 Locked down no longer but still firm friends 🦞