QUINCES
You might think "what's this doing here, we're not allowed to grow fruit trees on our allotments!". But here's just a note - there is a now a quince suitable for growing in a large pot, so those people who can set up watering systems or who live close to their plot could grow some quinces on a containerised tree.
Quince "Sibley's Patio" is available from dtbrownseeds.co.uk |