First of all, blueberries like very acidic soil. Since most soil is more or less neutral, that means that most garden soil is not suitable, and you’ll therefore need to grow them in pots in ericaceous compost. You can buy compost from most garden centres and compost suppliers. When you first plant your blueberry, choose a container that is about 30cm in diameter, and be prepared to move it to a larger one in a few years’ time.
Secondly, although there are several types of blueberry that are marketed as ‘self-fertile’, some need another cultivar nearby. And whether self-fertile or not, your crop will be much better if you grow two different cultivars close together. This is not hard, as there are plenty of different varieties out there, but check the labels carefully to make sure.
Thirdly, you’ll need to provide food and water. Make sure the pot doesn’t dry out, watering with rainwater if possible. Of course in a drought, any water is better than none, but do try not to use tapwater if you can avoid it. Feed each month with an ericaceous fertiliser.
The fruit ripens in stages, so you will need to pick it as it ripens. You may find that you need to net the bushes to protect them from birds, who seem to find blueberries almost irresistible.