What does it look like?
Vigorous evergreen, high-climbing vine to 6+ m with long stems that are hairless and angular when young and which have spiralling tendrils. Leaves are very thin and 5-lobed almost to the base, with each lobe 3-8 cm long and narrow. Hanging whitish purple flowers (6-9 cm diameter) with purple filaments are produced from December to April, followed by hanging round fruit (3-5 cm diameter) that ripens from green to yellow, has small amounts of inedible pulp, and contains silver-brown seeds (4 mm long).
Why is it a problem?
This South American beauty has turned into a bit of a beast in parts of New Zealand, spreading into natural areas and smothering native plants. Its seed is spread by birds and possums, and it also grows from layering, where stems touch the ground, forming roots and new plants. Disperses effectively, grows quickly to medium to high canopy forming large masses, and stems layer. Tolerates damage, drought, hot to cold temperatures and moderate shade.
How much of it do we have?
This plant is frequent in most gardens around Argyle St, Waipu. It is also around Waipu Cove to Langs. This weed is spreading but is controllable, work should be focused on removing this plant before it becomes widespread throughout our area.
How does it spread?
Birds and possums carry seeds moderate distances. Often used as rootstock for P. edulis.
What can we DO about it?
Good news – we can get rid of all of it! The 5 lobe leaves make this plant easy to id, Get rid of it from your own garden and spread the word to your neighbours and friends.
- Pull roots up (all year round). Cut off above ground or tie stems in air to prevent them coming in contact with the ground and taking root.
2. Cut down and paint stump (all year round): glyphosate (200ml/L) or metsulfuron-methyl 600g/kg (1g/L) or a product containing 100g picloram+300g triclopyr/L (100ml /L) or triclopyr 600 EC (100ml/L) or triclopyr 120g/L (500ml/L) or Banvine (200ml/L) or Woody Weedkiller (400ml/L).
3. Spray large masses on ground where roots cannot be pulled (spring-autumn): Banvine (120ml/10L) or dicamba 50g/L (24ml/L) or triclopyr 600 EC (30ml/10L) or triclopyr 120g/L (15ml/L).
What can I do to stop it coming back?
Stems layer, stumps resprout so followup and control as needed to eradicate. A few seedlings may appear in bared areas. Use herbicide only when roots cannot be pulled.
Special disposal notes: Cut stems can layer – Hang up off the ground or leave up in vegetation to dry out.
CAUTION: when using any herbicide or pesticide PLEASE READ THE LABEL THOROUGHLY to ensure that all instructions and safety requirements are followed.
Photos of blue passionflower