Gorse Removal and Mulching

How to identify gorse

Ulex europaeus

• Dense spiny shrub, usually 1m to 3m tall, often forming an impenetrable thicket.
• Bright yellow pea-shaped flowers, heaviest in spring but present on and off most of the year. A coconut smell on a warm day is the giveaway.
• Green spines rather than true leaves on mature growth. Seedlings have soft clover-like leaves before the spines harden.
• Thrives on poor, disturbed and steep ground, and on north-facing faces where nothing else has been managed.

Why it is a problem on your land

Gorse takes usable land out of production faster than almost anything else in New Zealand. It shades out pasture, blocks stock access, hides fence lines so they cannot be maintained, and carries a genuine fire risk once the dead material builds up underneath. It is also a declared pest plant in most regions, which means a neighbour or a regional council can eventually make it your problem in writing rather than just your problem in practice.

Why spraying alone does not solve it

Spraying kills the plant but leaves it standing. You get a paddock of dead, dry, still-spiny gorse that is harder to walk through than it was alive, more flammable than it was alive, and still blocking every metre of ground underneath it. On a steep face it can stand there for years. The seed bank in the soil is untouched either way, so the regrowth conversation is the same. Spraying has its place, and plenty of people use it well, but it does not give you your land back on the day.

GRazer do not spray. Herbicide is a legitimate tool and there are situations where it is the right call, but it is not a service we offer. What we do is remove the plant mechanically.

How we clear gorse

We mulch gorse in place with remote-controlled machines, cutting it to ground level and processing the whole plant into a fine mulch layer that stays on the site. Mature gorse stems at 200mm to 300mm are within our machines' capacity, which is two to three times what most slope mulching in this country is set up to handle. Because the machines are remote-controlled we can work faces up to 55 degrees with nobody sitting on the slope, which is the part that matters on gorse: it grows where it is genuinely dangerous to put an operator.

What the site looks like afterwards

You get access back the same day. The mulch layer sits on the surface, suppresses light, and slows the seedlings that come up from the existing seed bank. Expect some regrowth, because gorse seed stays viable in the soil for decades and no method available changes that. The difference is that regrowth on a mulched site is soft, low, and easy to deal with by grazing or a maintenance pass, instead of being a thicket you cannot get into.