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Black Mulch 40 Litre Bag

This product has a minimum order qty of 10.
FREE Shipping throughout our Metropolitan Auckland Delivery Zones

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Product Description Shipping Information Why Buy From Us CUBAG 3D Guarantee

A beautiful dark decorative contrast cover for atop your garden beds. This striking looking black mulch manufactured by reharvest is great at retaining water, thus providing a water supply to your plants in the driest summers. By applying it at a minimum 100mm depth, you can create a natural weed suppressant and take some of the laborious effort out of gardening!

Suggested application depth: 100mm to create a weed suppressant.

Time before topping up: Annual top-up recommended.

Please Note: Our Black Mulch is dyed with an organic black vegetable dye and as a result there is a potential risk of staining occurring. Although this is unlikely to occur, if you would prefer to avoid staining, we would advise noting in your delivery instructions that you would like your bags to be placed on grass or a similar location where the staining will have minimal impact. We would recommend laying out a tarpaulin or other ground cover, to mark the location should this be an issue and to prevent any staining. Cubag will accept no responsibility for any damage that is caused by stain running from the Black Mulch. If you have any further enquiries about this, we advise you contact our team prior to ordering to receive further information.

Made from recycled timbers and dyed jet black, this product is striking and highly appealing resulting in a more polished and refined look to your garden. With long lasting colour, the dye will retain this look for a minimum of two years before you’ll have to undergo re-mulching although a yearly top-up is ideal to retain maximum visual appeal. The dyes used are 100% toxin-free, meaning that it’s completely safe to use on gardens and the resulting product will help your flowers and plants stand out better in the yard.

The timber use in the product consists of recycled wood which is air dried resulting in a collapse of cellular activity and decreases the water absorption of the wood. As a result, the air drying slows down the decomposition rate of the chips, which is responsible in part for its 2 Year duration. This process makes it lightweight and therefore compacts well and is capable of enduring all kinds of weather. Owing to its unique nature, when it rains, the water passes between the fibres and gets stored beneath and used to benefit the plants, rather than going to waste.


  • Dye allows the mulch to create a “wow factor” impact in the garden, with no negative impact on the plants.
  • Mulches form a protective barrier atop the soil and assist with controlling the temperature of the soil. This means that it helps keep plants warm in the winter and keep them cool in the summer. It’s basically a garden insulation system!
  • Promotes virility amongst the plants and the opportunity for the roots to spread and grow strong in almost any conditions.
  • Can support the decomposition and integration of other organic media that is applied to it – i.e leaves in the autumn. By turning them over beneath the protective layer they will naturally decompose and become part of the mulch, thus pushing nutrients back into the soil.

Mulches are layers of organic materials applied to the surface of an area of soil. It can be applied either directly to soil with plants in it, or to soil that is yet to be cultivated and through natural incorporation by elemental activity and the activity of worms, it will naturally work its way into the soil. Although black mulch is primarily used as a decorative feature in gardens, it also serves other purposes such as conserving moisture, suppressing weed growth and improving the all-round health and fertility of the soil. When applied correctly, it can dramatically improve soil, resulting in greater abundance of produce (if fruit or vegetables are involved) or vibrancy of colour and scent (in the case of floral plants).

    FREE Shipping on orders in our metropolitan Auckland delivery areas*

  • Delivery is available free throughout our metropolitan Auckland delivery zones. .
  • Within Auckland, this typically means South to Pukekohe, North to Albany, West to Titirangi and East to Bucklands Beach. If you’re unsure, upon entering our website the address popup will advise you if there are any additional costs to your nominated address.
  • DELIVERY CONDITIONS: Our deliveries are made by truck mounted moffat/forklift machine for bulk bag orders. We recommend you measure the narrowest point of your access and advise us of this measurement. We require a minimum width of 2.7 meters to access your property. These deliveries cannot be made into garages/carports, over fences, on steep hills/slopes or where low power lines or over hanging trees are in place. We cannot drive on or over soft grass or ground as the forklift will likely damage the area or get stuck (this includes lawns or driveway mowing strips). The forklift has a triangular wheel set up under the forklift with 3 wheel points, for maneuverability. If you are unsure if delivery is possible, please contact us and we will do our best to advise you. Please email us if you would like a quote for hiab delivery (should you require over fence access). All cubic metre, half metre and quarter metre bags, once emptied, are to be returned to us. We will collect and recycled for free, they must still be in a re-useable condition or a $20 per bag fee may be applicable. Please note: Truck mounted forklifts are specialised machines, needing specific conditions to successfully deliver. Whilst Cubag and the delivery drivers will take all care and effort to make sure orders are delivered as per your delivery instructions, we are unable to guarantee exact placement. Should the driver deem your products be unable to be delivered in the location you requested, the driver will unload in the next possible, safest spot at his sole discretion. We will attempt to contact you while the truck is onsite should this occur, please ensure you are contactable by the phone number supplied on delivery day. If the truck mounted forklift is unable to access a property, delivery is refused or the order cannot be delivered onsite, a delivery fee of $40.00 per bag with a minimum fee of $100.00 for orders placed using our free delivery will be charged, or any delivery charges you have paid will be non-refundable, re-delivery will incur additional delivery fees. These fees will be deducted from your refund.
  • Additionally, if site access is tricky we offer we also offer hiab truck mounted cranes for difficult access jobs. Additional delivery costs apply for crane services which at your request are automatically added to your cart upon checkout.
  • Handy Bags (carry-able bags): a minimum order quantity of 10 applies. Quantities of up to 10 bags can be hand lifted and delivered (unless requested otherwise) and any order quantities of 10 or more are supplied on a recyclable pallet. We will then collect the pallets upon completion of your job so that we can re-use and recycle them.
  • For Ponga Logs & Railway Sleepers, all products are either hand delivered, crane delivered (extra charges apply) or in some circumstances, when safe, tipped of the back of a tipper truck.
Still unsure if your address will receive free delivery?:
  • Contact us on 0800 47 33 66 during business hours or email for further questions.

  • *On orders of 1m³ of the same product or greater across all products, excluding railway sleepers and ponga logs. If you're unsure of delivery, then please contact our support team at

    Cubag is the New Zealand's leading supplier of home delivered bagged landscape supplies, and we have many great reasons to buy from us. We are a customer focused company because we always put client satisfaction as our number one priority. Our goal is to take the hassle and mess out of traditional means of the delivery of your bulk garden supplies. With an easy to use web interface, instant toll free support we’re here to serve your needs. Shop with us today and see why many clients rave about our />
    Here are just a few of the reason why you should buy from us:

    • FREE DELIVERY across metro Auckland and Wellington.
    • Best price GUARANTEED! …. Or we pay you!
    • On time delivery GUARANTEED! …. Or we pay you!
    • 90 Day 100% money back GUARANTEE.
    • Bulk discounts …. The more you order, the more you save.
    • No mess on your driveway, all bulk products contained in our no mess cubic metre bags.
    • Saves you time, no need to leave home - order online
    • Impeccable Customer Service
    • Secure ordering.
    • All major credit cards accepted. Earn credit card points or air points on all purchases
    • Hundreds of satisfied customers!

    All of our growing media ingredients are locally sourced from New Zealand’s leading suppliers and only top quality ingredients are used in our mixes. We have a full range of soils and mulches to serve any need, often with a blend tailor made for a specific growing purpose.

    Your “cubag” comes with a skirt sealed top and a bag that is recyclable, water resistant and ready to work when you are!

    This industry-leading guarantee is our way of saying you can count on us to get your soils, stones and mulches to your destination, on-time and on budget every time or we’ll make it up to you. We are ultra-confident that your bags will arrive on schedule and on budget, in fact we guarantee it.

    Put simply, CUBAGs 3D guarantee is the best guarantee in the landscape supply game on earth, period.

    • Delivered: on time or your money back ! .... plus we pay you $100 for the inconvenience.
    • Discounts: the best home delivered price guaranteed ! .... or we pay you the difference, plus $100.
    • 90 Day 100% Money Back Guarantee .... if for any reason you are not satisfied we will collect the goods and refund your money, no questions asked.


    If your bags do not arrive by the end of the scheduled day or (without agreement) before or after your scheduled delivery date, barring breakdowns/mechanical issues, motorway closures or natural disaster events beyond our control, we will refund your money and reimburse you a further $100. Should your order qualify under the guarantee, you decide you still want the product and decide to accept late or early deliveries we will still reimburse you the $100, unless you have agreed to or requested an earlier or later delivery date.

    Product comparisons must be:

    • Compared with an identical product that is eligible for delivery within Cubag's free delivery zones.
    • In cubic metre bags & mobile forklift delivered. i.e. not compared versus a bulk tipper load of product.
    • Priced with the bag/packaging inclusive in the price. i.e. no bag deposits or prices that are net of bag/packaging costs.
    • Verifiable either online or in printed advertisements.

    Best delivered price guarantee is also valid for 30 days after your purchase.

    90 Day 100% Money Back Guarantee:
    Applies to our 1m3 regularly stocked website products on free delivery orders only. Does not apply to custom freight, outer area, hiab deliveries, special order products, carryable (small) bags, 0.25m3, 0.5m3 or quantities over 4m3.
    Applies to full bags only, not opened bags with product extracted from it or product already tipped out or spread in the garden.
    We will pick up and collect the product freight free anytime within 90 days.

    Any refunds are GST inclusive and will be treated as a credit versus your initial purchase and credit back to the same credit card or bank account that you initially paid with.
    Should your initial purchase be under $100 then the balance will be credited against your account for future use.

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    We currently deliver to most parts of the Auckland region. Please enter your delivery address as prices can vary by location.

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