I have ordered some cranberry bushes which will come in 1 litre pots and will be little. I intend to container grow them so that I can ensure the soil is acid enough. Should I transplant them up and up as they grow, or should I plant them straight off into their fullsize pot? Also what size will they need? I was thinking 35-40 litres/40-50 cms?
Also, as they are, I believe, shallow-rooting should I aim for shallower wider pots if I can find them?