Originally Posted by Cliclaste
I will definitely do that, my question is though, what is the best way to sterilize the needles before adding them to secondary?
Going in the secondary you probably don't need to worry about sterilization, there should be enough alcohol in your mead to take care of anything that may be on the pine needles.
However if for peace of mind you want to do something you could try the steam method some use for oak chips/cubes, place them in a microwave safe container with a small amount of water, not enough to cover, and give it a couple minutes in the nooker to bring the water to a boil, then cover and let them sit for about 10 minutes. You can add the water into your mead as well as it will have some steeped flavors and is clean and safe.
The oven idea sounds good too but my concern would be that even though you are not letting them toast the method itself will cause drying and loss of some of the essential oils that provide the volatile compounds for flavor and aroma, would probably still work but you may want to consider increasing the quantity of needles some.