The one essential condition is the acidic quality of the soil - a pH between 4 and 5.5 is ideal for growing blueberries. If your soil is not naturally ericaceous, you can use sulphur chips, or you can grow your blueberries in a pot where you can monitor and alter the pH using ericaceous compost from the start.
If preferred, you can also plant your blueberries in a raised bed.
Prepare the soil ahead of planting out - if you are lowering the pH by adding sulphur chips, do this at least three weeks before planting in order for these to take effect.
Dig in plenty of well-rotted compost - organic matter such as grass clippings, leaves or manure is perfect. Then dig a hole to comfortably fit the root ball, mix a small amount of granular fertiliser into the hole. Note that if not thoroughly mixed in or if too much is used, it may cause damage to the roots.
Remove the plant from its pot and position it in the hole, fill with soil and water thoroughly. Ideally use rainwater, as tap water contains lime and will bring the soil pH away from the acidic quality needed.
Plant blueberries 1.5 metres apart. If you plant more than one blueberry this will ensure cross-pollination - which is not essential, but will give you higher yields. Use pine needles, wood chips or acidic peat as mulch.