Pine Straw is different than wood mulch or bark. It comes in a bale. Mostly used in the South Eastern part of the US, it has made its way north and becoming very popular due to its ease of transporting, spreading, and durability. The needles are 6-8 inches long and will last for 2-3 years. Like the red pine bark, it releases acid into the soil helping plants that prefer acidic soil. Each bale weighs 15 – 25 lbs.