Found this post about making Spruce Beer on an American site:
I 'discovered' spruce beer while I was putting together recipes for my historic brewing demonstrations.
http://picasaweb.google.com/picobrew/HistoricBrewing#
My historic mash tun is half of a whiskey barrel with a hole in the bottom. To separate the grain from the wort I would use straw or pine branches - these don't add any flavor but work pretty well.
One day I used spruce branches - WOW
The key to using spruce is - not to boil it!
All my spruce goes into the mash - and I use lots of it! - 5 to 7# per 10 gallons.
I use - 'any old spruce' - mostly white (less flavorful) or blue (more flavorful).
I usually use the last 3 tips on a tree. These tips are usually 4 to 6" long. I leave them attached to each other - as this makes for a better - more stable - filter bed in my mash.
If you use an 'old X-mas tree' - make sure it does not have tinsel!
If I were going to do this in an extract batch I would steep the spruce boughs in the water - before adding the extract - at between 140 - 165F for 30 to 60 min. Remove the spruce before adding the extract. Proceed as usual.
Spruce can be used in most any style - my favorites to date would be - Belgian Spruce IPA, Hoppy Spruce Stout, Sour Smoked Spruce Beer.
If you have a smaller quantity of spruce - some brewers in the group - have had success adding a pound or less at the end of the boil - steeped for a few minutes before cooling.
I have never done much with the 'young new growth' - when I chew on it - it has more of a green grassy flavor - and have never had enough to try by it's self.
Trimming spruce trees will stunt their growth as mine are not 'spreading out' much any more - that is why I am using more white spruce these day than blue spruce.
And someone added:
For the FWIW file, with juniper I steep the branches in hot water for several hours and then use the water for all the operations. Sounds like spruce could work the same way, especially if only put in the mash.