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GARDENSURE PINE BARK 20MM BAG 50L

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Gardensure Pine Bark 20mm is a graded, brown to reddish-brown bark mulch supplied in a handy 50L bag. Its larger 20mm particle gives garden beds a natural, chunky finish that settles well and stays in place, making it a popular choice for beds, borders, and around trees and shrubs. Below the surface it delivers the core benefits of a quality mulch: it helps suppress weed growth by blocking light to the soil, retains soil moisture by reducing evaporation, and regulates soil temperature fluctuations to optimise plant growth. As it slowly breaks down it enhances overall soil health by adding organic matter. Because the range is naturally sourced or recycled, some variation in colour and size can occur from what is shown online. Mulch is generally laid 50 to 100mm thick. Available in bags or by the cubic metre for pickup or delivery across Melbourne and Geelong.

$ 12.00 $ 12.00

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GARDENSURE PINE BARK 20MM BAG FAQs

Here are some common questions about our bagged 20mm Pine Bark

20mm Pine Bark suits larger garden beds, commercial landscapes, and open or exposed areas where a heavier, more durable ground cover is needed.

Yes. The larger, heavier nuggets are less likely to wash or blow away on slopes or in exposed sites compared to the finer 10mm grade. For sheltered garden beds or a neater finish, 10mm is usually the better fit.

Pine bark isn't a food source for termites the way structural timber is, but keeping any organic mulch clear of building foundations and timber structures (aim for at least 50mm) is good practice to avoid creating a moist, sheltered environment near your home.

Yes, 20mm Pine Bark is untreated and undyed, with no added chemicals. It's still sensible to discourage pets from chewing large amounts of any mulch, but the bark itself isn't toxic.

There are approximately 25 bags in a cubic meter. 

  • Wind & Weather Resistance: Larger, heavier nuggets stay put better than fine mulches in exposed or sloped sites.
  • Weed Control: A thick layer suppresses weed growth over open areas.
  • Longevity: Coarser bark breaks down slower again than the 10mm grade, ideal for low-maintenance commercial or large area jobs.
  • Soil Enrichment: As the mulch slowly decomposes, it adds organic matter to the soil, improving soil structure, drainage, and long-term fertility.
  • Natural Look: Undyed, with natural colour variation from golden to dark chocolate
  • Moisture Retention: Helps reduce evaporation from the soil surface.

Product Disclaimer

Please note: While we aim for consistency, slight colour variations from online images may occur due to the natural and recycled materials used. For the most accurate colour representation, we recommend visiting one of our stores before placing a large order.

  1. Prepare the area: Clear existing weeds and debris. Lay a weed mat first for maximum suppression.
  2. Apply at the right depth: Spread to 50–100 mm. Too thin and weeds can break through; too thick restricts water penetration.
  3. Keep clear of plant stems: Leave a 50 mm gap between mulch and plant stems or tree trunks to prevent moisture build up.
  4. Water it in. Give the area a good drink after mulching to settle the layer and start pushing moisture down to the roots.
  • Natural Weathering: Over time and UV exposure, the surface layer will gradually silver slightly, a normal part of how bark ages outdoors.
  • Keeping it Looking Fresh: A light rake or turn each season lifts the surface layer and brings the richer underlying colour back to the top.
  • Even Coverage: Topping up thin or patchy spots as needed helps keep the bed looking consistent and full.
  • Top Ups: To keep your mulched gardens pristine, Re-mulching is recommended yearly to every three years. Remember that the thicker mulch is laid, the longer it lasts. Keep in mind that mulch laid over 100mm can reduce water entering the roots. 
  • Wear gloves when handling the mulch.
  • Avoid contact with eyes and skin, and prevent inhalation of dust and vapours.
  • Store away from open flames.
  • Keep dry before and after installation.



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