Willow is the ideal wood for RCW for three scientific reasons. First, its young branches have a balanced carbon-to-nitrogen ratio (C/N between 30 and 60), which promotes rapid decomposition and a gradual release of nutrients without causing nitrogen deficiency. Second, willow is a fast-growing hardwood whose lignin is easily biodegradable by basidiomycete fungi — the same fungi that create forest humus. Third, willow contains no resins or thujaplicins (unlike cedar and spruce), compounds that inhibit soil microorganisms and slow down pedogenesis. Ramo's willow RCW mulch is OMRI® certified for organic agriculture.

For best results, apply a 3 to 4 inch (7–10 cm) layer of RCW mulch around your plants. This depth is sufficient to retain moisture, suppress weeds, and gradually feed the soil. For trees and shrubs, a 4 to 6 inch (10–15 cm) layer is recommended over an area equal to the canopy spread. In vegetable garden pathways, 2 to 3 inches (5–7 cm) is sufficient. Avoid exceeding 8 inches (20 cm), as an overly thick layer can restrict gas exchange. Always leave a 2-inch (5 cm) gap around stems and trunks to prevent crown rot.

RCW mulch can be applied year-round, but the two ideal periods are:

•Spring (April–May): before the heat rises, to retain soil moisture and reduce watering from the start of the season.

•Fall (September–October): to protect roots from winter frost and allow the RCW to slowly decompose over winter, enriching the soil for the following spring.

Avoid applying on frozen or waterlogged soil. For new plantings, apply RCW immediately after planting to reduce transplant stress and encourage root establishment.

No, if used correctly. Nitrogen deficiency (also called "nitrogen hunger") only occurs when RCW is incorporated into the soil — the decomposing microorganisms then temporarily consume available nitrogen. Applied as a surface mulch (without incorporation), this effect is negligible: microorganisms work at the soil/mulch interface and do not compete with plant roots. Quebec research confirms that approximately 1 kg of nitrogen is immobilized per cubic meter of incorporated RCW — but as a surface mulch, this impact is nearly zero. Simple rule: never incorporate fresh RCW into the soil.

No. Contrary to a very common misconception, RCW mulch made from hardwoods — especially willow — does not acidify the soil. In fact, studies have shown that applied to acidic soils, hardwood RCW tends to slightly raise the pH toward neutrality. Cedar mulch, on the other hand, can slightly acidify soil due to its essential oils. Ramo's willow RCW is suitable for the vast majority of garden, vegetable, and landscaping plants.

Yes, RCW is excellent in vegetable gardens. Here's how to use it by zone:

•Pathways: apply 2–3 inches (5–7 cm) to suppress weeds and retain moisture.

•Around perennial vegetables (asparagus, artichokes, herbs): apply 2–3 inches (5–7 cm) on the surface.

•Around annual vegetables: wait until the RCW is partially decomposed (6–12 months) before placing it near seedlings.

RCW stimulates mycorrhizal fungi that form beneficial associations with vegetable roots, improving their absorption of water and nutrients. Result: up to 30% reduction in watering needs and better disease resistance.

Yes, this is one of the best uses for RCW. Fruit trees particularly benefit from the stimulation of mycorrhizal fungi that willow RCW promotes. Apply a 4 to 6 inch (10–15 cm) layer over the entire canopy area (without touching the trunk), leaving a 4-inch gap around the base. Renew every 2 to 3 years. Apple, pear, cherry, and plum trees respond very well to RCW, with notable improvements in fruit quality and a reduction in foliar fungal diseases.

Cedar mulch is made from mature wood and bark. It decomposes slowly (3 to 5 years), is primarily used for aesthetic purposes and weed suppression, and can slightly acidify the soil due to its essential oils. It also contains thujaplicins — compounds that can inhibit beneficial soil microorganisms.

Ramo's willow RCW mulch is produced from freshly chipped young living branches. It decomposes faster (12 to 24 months), actively feeds the soil's microbial and fungal life, and tends to stabilize or slightly raise soil pH. OMRI® certified for organic agriculture, it acts as a true living amendment that durably improves your soil's structure and fertility — where cedar simply covers

Ramo willow BRF mulch is available in bulk with delivery to the Montreal, Lanaudière, Laurentians, and Montérégie regions, as well as in bags at several retail locations across Quebec. Use our “Find a Retailer” tool at the bottom of our website to locate the retailer nearest you.