Repurpose your grape marc to increase soil health

repurpose your grape marc
repurpose your grape marc

Repurpose your grape marc to increase soil health

It’s well known in the viticulture industry that grape marc is not only a nuisance, but it can have a negative impact on the environment if not disposed of quickly and correctly.

Grape marc can be used for cattle feed, fuel, hand sanitiser, grape seed oil, or even to make grappa. But the challenges that come with these solutions are the ability to cope with a raw material that arrives all at once, the transportation requirements, and the money & time to set up a facility big enough to cope. A logistical nightmare.


At Wholesale Landscapes we believe in being resourceful and making the most of what we have been given, so we would like to share a way in which you can repurpose your grape marc to benefit your vineyard’s soils.


Return your grape marc to the land

As caretakers of our land, it is our job to replenish the soil to build up organic matter and be sure there are enough nutrients to aid in the growth of vines.


Repurposing your grape marc to blend with one of Wholesale Landscapes base media means you can significantly cut down the environmentally hazardous properties of the grape marc and can feed it back to the vines as a compost which will increase the organic matter of the whole surface area and replenish the soil.


“We recommend in addition to your annual under vine compost spreading, to blend your grape marc with our Viticulture bark fines or sawdust media to reduce acidity and broadly spread to increase organic matter over your whole vineyard as a soil supplement.” – Caleb Hughes, Wholesale Landscapes


Nautilus Estate have utilised viticulture fines from Wholesale Landscapes as a carbon source in their grape marc compost for three seasons. “The reliable supply of a uniform aged bark fine product has been very helpful in the resulting compost quality with more rapid integration and homogenising with undervine soil.” – Mike Colins, Viticulturist, Nautilus Estate Marlborough

By doing this you will be able to see
  • increased microbial activity
  • increased organic carbon
  • improved water retention
  • and an overall increase in the health of your soil.


Radio New Zealand (RNZ) shared an insightful article about the uses of grape marc back in April 2021, specifically how grape marc can be resourced within our world-renowned wine regions. “For Marlborough, where a 50,000 to 70,000-tonne tsunami of grape marc builds from March to the end of April each year, it’s been a cause for court cases and academic research. It’s all about soil health. Better soil means healthier vines and more grapes. Spreading grape marc increased the organic carbon in the soil of one vineyard from around 3.8 percent to 5.4 percent.”


This is the perfect time to consider repurposing your grape marc. So if you have any thoughts or questions on the use of grape marc and how it can be resourced at your vineyard, send through your details and we’ll be in touch.

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Our Truck Volumes

3T Truck

Full truck load volumes
  • Bark: 7m³
  • Compost: 4m³
  • Supersoil: 3m³
  • Soil: 3m³
  • Shell: 3m³
  • Stone: 1.5m³

7.5T Truck

Full truck load volumes
  • Bark: 20m³
  • Compost: 10m³
  • Supersoil: 7m³
  • Shell: 8m³

11T Truck

Full truck load + trailer volumes
  • Bark: 25m³ - 65m³
  • Compost: 17m³ - 38m³
  • Supersoil: 12m³ - 29m³
  • Shell: 12m³ - 30m³

In Canterbury or other regions? We offer bulk truck and trailer load volumes throughout the South Island.

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Below is a list of our retailers. Please contact them for stock and supply.

PLEASE NOTE: Not all of our products are supplied to all retailers. We can only guarantee product quality of products we manufacture.

  • Wholesale Landscapes – Stoke Yard (that's us!)
  • Stoke Garden & Landscapes
  • Bay Landscapes & Garden Centre
  • Goldpine Richmond
  • Māpua Landscapes
  • Stonescape Garden Supplies (Concrete & Metals)
North Canterbury
  • Woodend Landscape Supplies
  • Amberley Hire & Landscape Supplies
  • Hanmer Landscape Supplies
  • Garden Box – Middleton
  • Urban Paving & Landscape Supplies – Harewood
  • Pearsons Landscape Supplies – Bromley
  • Styx Mill Landscape & Nursery  – Styx
  • Mitre 10 Mega Ferrymead
  • Odering Garden Centre Christchurch - Philpotts
  • Odering Garden Centre Christchurch - Barrington
  • Mainscape Garden Supplies
South Canterbury
  • Fulton Hogan Timaru
  • Ashburton Contracting Ltd (ACL)
  • Centaland
  • CMT Group
  • Kaikōura Landscape Supplies

Pick-Up Information

We welcome pick-up of product by the public for volumes 1m³ and over. Please check your estimated trailer weight rating below. If your trailer is unable to hold the weight of our minimum pick-up volume, please book a delivery. *We require a minimum order quantity of 3m³ for any bark, compost, soil or shell products and a minimum order quantity of 1.5m3 for any stones or aggregates.

Standard trailer
(750kg limit)
  • Bark / Mulches
  • Shell
  • Compost
  • Soil
  • Stones / Aggregates
Tandem trailer
(1,500kg limit)
  • Bark / Mulches
  • Shell
  • Compost
  • Soil
  • Stones / Aggregates
Tip truck
(2,000kg limit)
  • Bark / Mulches
  • Shell
  • Compost
  • Soil
  • Stones / Aggregates

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*We will quote to the nearest cubic meter.

Recommended depths

Typically you need a finishing layer of screened soil of 100mm when working with an uneven surface. 100mm of soil will allow to even out any hollows and give enough depth to create a flat surface

A general rule for compost is to allow for the depth of the current root structure of your plants with an additional 30-50% to mix in with the base. If you’re planting into holes or filling up a vege garden  you will need to accommodate for this prior to filling up

We recommend 100mm (10cm) deep for new bark gardens and planting into bare areas. For existing gardens with some cover, we recommend 75mm-100mm (7.5cm-10cm)

Note: Barked areas for playground impact protection need to meet NZS5828:2015 standards and is calculated on the fall areas and the height of the playground. Please contact us to discuss your barked playground areas

For paths and driveways which are often exposed to car and foot traffic, we recommend 100mm-125mm (10cm-12.5cm) on newly prepared areas due to settling of product.

This excludes preparation, compaction or drainage gravel underneath. For existing areas 75mm thickness is recommended for areas needing a small top-up.