Frostweave Cloth Farming
I made this Frostweave Cloth farming guide to help out players who want to farm the cloths instead of buying them from the Auction House. I decided to search for places with high density of mobs which I can kill and drop [Frostweave Cloth]. I traveled around Northrend, and after a while I made a list of places.
Frostweave Cloth
Farming Frostweave Cloth without [Northern Cloth Scavenging] sucks. The drop rate is horrible.
You can learn this skill by completing a quest, which is given by Grand Master tailoring trainers in Northrend. It requires Tailoring 325.
Icecrown
Go to Icecrown and farm Converted Heroes. These mobs are in pack of 6-7, which means you should be level 80-81 with decent gear to be able to farm these.
This is the best place to farm Frostweave Cloth, it does not matter if you are a Tailor or not, it's still the best place. If you are not level 80 or 81 yet, you should wait until you reach level 81 and then come back to farm these.

If you can't farm the Converted Heroes, you can try to kill Dark Zealots and Dark Ritualist, they are also in Icecrown.

I could go on and list a dozen of other places, but most level 76+ humanoid and undead mobs have the same chance to drop Frostweave Cloth.
Visit my Embersilk Cloth farming page when you are done farming Frostweave Cloth.
