Good question Dave and probably best answered by my overall philosophy on all my veggies.
- I'm only feeding two people so want enough fresh and to freeze till the next crop is ready - up to 9 months generally. I want to avoid waste.
- Grow crops were the flavour is enhanced by home growing
- Only grow crops which can be successfully stored
- Grow crops which are expensive to buy
The allotment is large, 40% of it down to grass as there's enough room to start a small market garden! With all the other stuff I have going on up there probably only 35% is used for vegetable growing. If I grow too much of anything it gets wasted. First I grow things with enhanced flavour (e.g. asparagus, tomatoes, strawberries), then crops which are expensive (e.g. most soft fruits), then crops which store well (e.g. frozen beans, kale, etc. onions, garlic dried).
I grow garlic because I have the space to grow 12 months supply, it stores well, I can grow better flavoured varieties and it gives me a lot of satisfaction! Ticks all the boxes. If I was pushed for space as a cheap thing to buy it would get dumped.
If we discussed potatoes I could easily grow a year's supply and the flavour would be great. BUT they are difficult to store for an amateur and are cheap as chips in the shops. If I have a bit of space I chuck some in but nothing more than to fill the space.