I see you are in a cool mountain climate and want to grow choko's. This challenge would be affected by how many frost-free months you have. I have seen them in Sydney 12 metres (40') up in a gum tree and have grown them in Bairnsdale on the South Coast of Victoria where they covered a shed. It's worth the challenge. Buy one or two choko's from a fruit shop and keep them inside on a bench until they start to sprout then plant the whole choko in a pot with the sprout base just under the soil. Keep them inside until all risks of frost are over. Select a spot in the garden that gets the maximum amount of sun for the day. Against a North or North-East facing wall or fence would be ideal. Dig a good sized hole and add horse or poultry manure in the bottom then cover that with soil. As the manure rots it will generate heat which will help get the choko growing and also provide fertiliser when the roots get down. Some aluminium foil or a piece of builders insulation fixed behind it will reflect heat and help as well. You will have to hope for a long hot summer to get chokos for harvest but it won't have cost you a lot if it doesn't work. Choko vines die back in the winter so you could give it a good blanket of hay or straw to protect the root from frost and hopefully a better season next year. All the best, let us know how you go.

- Jack