Wood mulch is a beautiful finishing touch to many growing projects. Adding mulch to the surface of garden beds and around trees or shrubs, such as raspberries, haskap, or perennials helps to conserve water, control weeds, prevent compaction from rain, and moderate soil temperatures. Two to four inches of mulch is typically sufficient, and should be topped up as needed. Mulch can also be used as a base layer when creating new beds.
Wood builds up soil organic matter (SOM) as it slowly breaks down and mixes with the soil. Fresh wood should not be mixed into the soil, as microorganisms also take up nitrogen, making this important and limited nutrient unavailable to the plants‒at least temporarily.
Two main types of wood mulch are 'rameal chipped wood' and 'trunkwood woodchips'. Rameal chipped wood tends to have a higher nutrient content than trunkwood. It is made from small to medium-sized green branches up to 7 cm in diameter, while trunkwood woodchips is made from whole trees.
Typical specific weight of wood mulch can be 11-12 lb/cu ft.
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