Blueberries

Blueberries are an easy to grow superfood. They make good plants for containers so you can get a reasonable crop whatever the size of your garden.

Blueberries need acid soil - grow in a pot with ericaceous compost if the soil in your garden is not suitable.
Plant 2 varieties to ensure cross pollination and better yields.
Plant while dormant, 1.5m apart.
Mulch with acidic peat, wood chippings or pine needles.
Water well using rainwater.
Net to protect during fruiting season.

source
http://www.bbc.co.uk/