Searles Pine Bark Mulch is durable and long lasting, which is a benefit if you are covering large areas or low maintenance areas. The traditional landscape mulch. Searles Pine Bark Mulch is graded to give relative uniformity in size. Mulching a garden has many benefits, most we already know, but before you start laying it, think about the different types of mulches and find out the right way to apply them. This can save time, money, effort and keep plants happier.