Bark mulch vs wood chips for garden beds?

Bark mulch is generally better for ornamental garden beds, while wood chips work well for pathways and utility areas. Both provide weed suppression and moisture retention, but they serve different purposes and break down differently in New Brunswick's climate.

Bark mulch is the premium choice for flower beds and around shrubs. It's made from the outer bark of trees (often pine or fir in NB), creating an attractive, uniform appearance that complements plantings. Bark mulch breaks down slowly over 2-3 years, gradually improving soil structure without robbing nitrogen from your plants. In New Brunswick's acidic soils, bark mulch helps maintain the slightly acidic conditions that many of our native plants prefer, including blueberries, rhododendrons, and most evergreens.

Wood chips are typically made from whole branches and contain more wood material, which breaks down faster but temporarily ties up soil nitrogen in the process. This makes them less ideal directly around plants, especially vegetables and annual flowers. However, wood chips excel for pathways between garden beds, around trees where you want long-term weed suppression, or in utility areas where appearance is less critical. They're often available free from tree service companies in Fredericton, Moncton, and Saint John.

For New Brunswick gardens, timing your mulch application matters significantly. Apply fresh mulch in late May after the soil has warmed up – early mulching can delay soil warming and slow plant growth in our short growing season. In coastal areas like Saint John and Shediac, the maritime humidity means both mulch types will retain moisture well, so apply a thinner layer (2-3 inches) to prevent fungal issues. Inland areas like Fredericton can handle slightly thicker applications (3-4 inches) due to better air circulation.

Practical application tips: Pull mulch 2-3 inches away from plant stems and tree trunks to prevent pest issues and crown rot. In clay-heavy soils common around the Saint John River valley, avoid piling mulch too thick as it can create waterlogged conditions. For sandy coastal soils, mulch becomes even more valuable for moisture retention during July and August dry spells.

Cost considerations in New Brunswick run $35-50 per cubic yard for quality bark mulch, while wood chips often cost $25-35 per yard or may be available free from municipal programs. A typical foundation bed (200 square feet) needs about 2 cubic yards for proper 3-inch coverage.

Need help planning your garden bed renovation? New Brunswick Landscaping can match you with local professionals who understand our unique growing conditions and can recommend the best mulching strategy for your specific property.