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19Oct

Native planting for shelter

WORDS & IMAGES SUPPLIED BY ENVIRONMENT CANTERBURY

You may remember the adage: “An animal resting in the shade is not doing what it is meant to be doing—eating grass and fattening up.” Things have come a long way since then and shelter has become one of the key components of animal welfare.

Native plants make great shelter for animals, while also providing a host of other benefits to you and your property:

  • Lower maintenance;
  • Less wind erosion;
  • Increased biodiversity and habitat, including for pollinators;
  • Resistance to drought, frost, and snow;
  • Higher dry matter yields.

It is important to source your plants from local sources (eco-sourcing) as these plants will be best adapted for conditions in your local area.

Shelter planting to complement—not compete with—your irrigator

Stock shelter can be planted underneath the irrigator in a few different formations:

  • Several straight rows dependent on prevailing wind;
  • In circles, depending on track and paddock placement;
  • As a row on the outside of your pivot, tall shelter that you hedge.

You need to allow a minimum two-metre wide fenced area for planting low shelter under the pivot, and 3.5 metres if planting tall shelter. Think about how your electricity will travel,  as eventually the vegetation will grow into the fence—be careful you don’t short it out. A dense, low flax shelter which is fenced either side should keep out cattle even with no electricity.

Saving money by protecting what's there

Retaining existing native scrub and/or fencing off native scrub such as matagouri, kānuka and coprosma helps with stock and grazing management and provides cheap and resilient shelter.

Stock Exclusion

The National Environmental Standards for Freshwater include new stock exclusion rules to protect our lakes, rivers and wetlands. This will help build on the great work that has already been completed by many landowners in managing freshwater on their farms. The stock exclusion rules for wetlands, lakes, rivers (where the bed is wider than 1m anywhere in your land parcel) have been in place for new pastoral systems since 2020. Under this rule, all stock except sheep on new systems must be kept at least three metres from lakes and rivers. All dairy cattle on existing pastoral systems are required to be excluded from lakes and rivers by 1 July 2023, as are intensively grazed pigs, beef cattle and  deer. Dairy support cattle have until 1 July 2025 before they too must be excluded.

Protecting wetlands

By 1 July 2025 stock must be excluded from wetland that supports a population of threatened species or are larger than 500-square-metres on low slope land. For full details on the stock exclusion rules, see our guide at ecan.govt.nz/stock-exclusion. There are many benefits to protecting wetlands on your property. They act like kidneys for our waterways,  absorbing and filtering nutrients and sediment. They are also great for mitigating flood flows as they act like a sponge, slowing down overland flow of water.

If you are looking for  further advice or assistance around biodiversity or land management call 0800 324 636 and our customer service team will put you in touch with one of our friendly advisors.

Low shelter plant species, perfect to grow under pivot irrigators

Species

Mature height (metres)

Spacing (metres)

Wildlife value

Shrub Pohuehue Muehlenbeckia astonii

2

1.5

berries

Mingimingi - Coprosma rigida

1

1.5

berries

Mingimingi - Coprosma propinqua

2

1.5

berries

Mingimingi - Coprosma rugosa

3

2

berries

Mingimingi - Coprosma virescens

2

1.5

berries

Tauhinu Ozothamnus leptophyllus

2

1.5

nectar

Toetoe Cortaderia richardii

2

1.5

Grain

Mountain Flax Phormium cookianum

1.5

1.5

nectar

Harakeke/NZ Flax – Phormium tenax

2.5

1.5

nectar

Korokio - Corokia cotoneaster

2.5

2

Berries and nectar

Koromiko Veronica (Hebe) - salicifolia

3

2

nectar

Fast-growing tall species, perfect for outside the pivot, filling paddock corners, or under irrigator end guns
 

Species

Mature height (metres)

Spacing (metres)

Wildlife value

Suitable for hedging

Lowland ribbonwood Plagianthus regius

12

3

nectar

 

South Island Kowhai Sophora microphylla

8

2

nectar

 

Narrow leafed lacebark Hoheria angustifolia

6

2

nectar

 

kānuka Kunzea ericoides

8

2

nectar

 

Maunka Leptospermum scoparium

4

2

nectar

 

Cabbage tree/ti kōuka Cordyline Australis

10

2

Nectar and berries

 

Karamu Coprosma robusta

5

3

berries

Yes

Kohuhu Pittosporum tenuifolium

6

3

Nectar

Yes

Lowland totara Podocarpus totara

15

6

Berries and Nectar

Yes

Broadleaf Griselinia littoralis

6

2.5

Berries

Yes

Akiraho - Golden Ake Ake Olearia paniculata

4

2.5

nectar

Yes

Twiggy Tree Daisy Olearia lineata

5

3

Nectar

Yes

Mountain Ake Ake Olearia avicenniaefolia

4

3

Nectar

Yes

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