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Old Man's Beard 

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Old Man's Beard is considered the most damaging climbing plant introduced to New Zealand because it smothers the plants and trees it grows on. This makes it a threat to Otago’s biodiversity.

Help us Protect our Patch by getting rid of Old Man’s Beard on your property.

Why is Old Man’s Beard considered to be a pest plant?

  • It suffocates plants and trees, making it a threat to NZ’s native bush
  • It spreads easily - stems on the ground can take root and produce new plants
  • It can produce 1000 seeds per square metre, which stay in the soil or are spread by wind, water and birds
  • It grows quickly – a stem can produce up to 10 metres of new growth in a season

 

Where does it grow?

Unfortunately, it grows almost everywhere: gardens, hedges, along roadsides and riverbanks, in native bush, commercial forest, and shelter belts. It thrives in the shade and is frost tolerant.

How do I identify Old Man’s Beard?

Flowers

  • Developing flower: greenish-white colour 
  • Mature flower: pale yellow colour

Vines

  • Young vines have longitudinal ribs 
  • Mature vines have stringy, pale brown bark 
  • Old vines are woody and stringy, often grey in colour
  • Can be 6-7cm thick

Leaves

  • Stems have five leaflets
  • The vine is deciduous (it loses its leaves each winter)

Make sure you don’t confuse Old Man's Beard with native Clematis. The natives usually have only three leaflets per stem (Old Man’s Beard has five) and flower in spring (Old Man’s Beard flowers in summer).

 

Clematis

Clematis

Old Mans Beard

Old Mans Beard

How do I control Old Man’s Beard?

Land occupiers are legally required to destroy any Old Man's Beard on their land. 

  1. Trace the vine back to its roots
  2. Either dig out the roots, or cut the vine close to the roots and treat with a herbicide gel or glyphosate-based product. You can get this from a hardware store; make sure you follow the instructions and take relevant health and safety precautions
  3. We recommend you leave the cut vine in the tree to break down naturally
  4. Don’t leave vines on the ground because they can take root and grow new plants

Note that vines may need to be re-treated or new seedlings removed

Hints

  • You can leave vines above the cut to break down naturally. This will also prevent damage to the host plant. The vegetation will start to wilt within a few days. Where there's no wilting, start at the live foliage and work back to check for vines you may have missed.
  • Take out a section of the vine above the cut stump to ensure hanging vines don't come into contact with the ground, as re-growth may occur.
  • Where there are multiple stems, treat all stems or dig out entire root systems
  • Check the stump regularly for re-growth and treat again if needed.
  • If it's growing in a hedge and is hard to trace, two people are better than one - one person tugs on the vine and the other person traces it back to the ground.
  • If it's growing on a common boundary, talk to your neighbour and deal with the situation together.

If you're unsure of the best approach, contact our environmental monitoring team who are happy to give advice.

What is ORC’s involvement?

ORC environmental monitoring officers inspect properties around Otago during the summer months for Old Man’s Beard.

  • If non-compliance is found, property owners will be issued with a non-compliance notice.
  • A second inspection will take place after 4-5 weeks and if no action has been taken a notice of direction will be issued.
  • If no action has been taken by the next inspection in 2-3 weeks, this will be followed by an infringement notice.

ORC environmental monitoring officers are warranted, giving them legal authorisation under the Biosecurity Act to enter properties and inspect for pest plants.

View our Old Man's Beard brochure

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