Can anyone help? I’m trying to locate a source that I could buy the rolls of black furnace filters you guys use for your conifers. I tried looking at my local Walmart and they don’t seem to have it.
Thanks
Jacob
They got them at Amazon.com
http://www.amazon.com/exec/obidos/tg/detail/-/B000JQG19Y/ref=ord_cart_shr?_encoding=UTF8&v=glance
Magnus
It’s actually blue. It’s called natural furnace filter. (or something like that) Wal Mart, Loews and Home Depot all carry it in my area.
I live in Michigan and use 16"x20" cardboard framed blue colored furnace filters that I can purchase at any local hardware store. Perhaps, they are harder to find elsewhere. These are the kind that can be pulled apart in 2 or 3 layers. Save the scraps for filling in background foliage. I push about 5 of the circles onto stained half wooden skewers and then spray with adhesive and roll or dip the filter circles. As someone suggested, it might be better to taper the half skewers, before staining them. One can use wads of scrap furnace filters dipped into ground up WS Foliage Clumps, and glue them to the more distant brown stained hillsides. I paint the trees a faint blue on the most distant hills. For change of foliage color to yellows, oranges and reds in the Fall season, one can switch trees, or mount the trees, for each season, on separate foundations, to be switched as units. Bob Hahn 
You won’t find them at Wally World.
You need to try Lowes or Home Depot. I discuss some details of what to look for here, including some online links.
Mine had 2 cases of them on the shelf last week. [%-)]Must be a regional thing.
In Minnesota they are not in rolls but sheets and they are blue. I find then at Walmarts, but not every store and not every week. Usually the clerks don’t even know they are there, so don’t bothers asking. Just look for them in the furnace filter section and plan to find them hidden behind something else.
Try Home Depot or Lowes?