I just kegged my spruce ale. I used my standard pale ale grain bill and hopped with chinook and cascade. I added about 8 oz of spruce tips with 5 minutes to go in the boil. Tasting notes going into the keg was very citrusy flavor. I liked it and expect it to be good carbed up.
I harvested the spruce tips from the new blue spruce growth in the the spring. You want to get them when they are about the size of the end of you pinky or the size of the tip of a small paint brush. I shrink wrapped them and froze them until I brewed it about 6 weeks ago.
Thanks for the information. Let me know how it turns out in a couple of weeks. I was thinking of a similar hop combo with the spruce tips plus maybe some simcoe.
My spruce tree doesn't seem to be in the best of health so I am not sure if there will be much new growth.