Blueberries.

You can buy ericaceous compost in bags the same as normal compost. As for tree surgeons shavings  - I have not heard that. I would think mixing wood with compost would tend to deplete nitrogen from the compost. I have heard you can mulch with pine needles as they help keep the soil acidic. You can also buy ericaceous feeds for plants - again to help maintain the acidity.

Ive also heard coffee grinds are good for the soil condition they need, hope so as im saving mine up.

Thank you all for your replies.  I'll buy some of this ericaceous compost then.  Don't know where I'm going to get sawdust etc from.  Might have to just try a mix of the acidic stuff with normal soil / compost, and keep a bucket out the back to collect rain water.  SG6, do they really need to be kept moist at all times?

Cheers Gillie.  I wouldn't recognise Rhododendrons or Heathers but my wife says they grow in peoples' gardens.  We haven't seen them wild.  The water here is definately not hard water and I don't know if we have a limey kettle.  Don't think we do though.  Well that's encouraging then.  As for my soil, it's the normal chestnut brown type, but with lots of stones unfortunately which apparently never go away as we're right by the river.  I noticed one of the experienced plot holders who's widely regarded as one of the best growers who's further away from the river, but nearer our stream, has a grey coloured soil.