Gorse

Member of the Fabacae (pea) family

This invasive species has been a pest to both farmers and gardeners alike in New Zealand for years. Gorse is a woody perennial that presents large spines over its spreading branches, especially as the plant ages. Usually found in poorer soils, bare land, cliffs or banks and places where the soil has been disturbed.

The yellow, pea-like flowers appear during summer and turn into seed pods, which will turn black  and explode in the summer sun, dispersing long-lived seed for up to 5m away.

As an added note, not all aspects of gorse are considered bad, as it provides a good source of food for bees. If you take out a lot of gorse on your property, consider planting other hardy natives (such as manuka) in its place that will also help feed bees in the area.
Gorse can also be nitrogen fixing, adding nitrogen back into poorer soil types.

Physical solution

Cut back regularly to help stop the seed from spreading.
This physical control will need constant attention as stumps regrow quickly and long-lived seeds sprout fast especially after disturbance.

Chemical Solution

Option 1

Use Cut ‘N’ Paste MetGel. Cut stems back and immediately apply the paste.
Repeat as necessary. In some cases multiple applications are necessary.

Option 2

Use Cut ‘N’ Paste Picloram. Cut stems back and immediately apply the paste.
Repeat as necessary. In some cases multiple applications are necessary.
Alternatively, also cut back and swab with a glyphosate product such as Weed Weapon or Yates Zero Weedkiller with a mix rate of 250ml/L.

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