Wisteria Mercury
Notify MeWisteria Mercury is a deciduous climbing vine admired for its stunning, cascading clusters of soft violet-blue, lightly scented flowers that appear in late spring to early summer. Known for its vigorous growth and abundant flowering, it creates a striking focal point when trained over pergolas, arches, or along walls and fences. With support, it can reach up to 6-8 metres high and wide, making it ideal for cottage, formal, and romantic garden styles.
Plant in full sun with well-draining, fertile soil. Space away from structures that could be overwhelmed by its growth. Prune twice a year-once in summer to control size and again in late winter to encourage flowering. Water during dry spells and mulch annually to retain moisture and suppress weeds. Allow time to establish before full flowering potential is reached.
Trimming: Prune twice yearly to maintain shape and encourage flowering. In late winter, cut back side shoots to 2-3 buds to promote flowering spurs. In summer, after flowering, trim new growth back to around 15 cm to control size and direct energy into flower production.
Deadheading: Not essential, but removing faded flower clusters can improve appearance and reduce seed formation.
Fertilising: Apply a high-phosphorus fertiliser in early spring to encourage flower bud development. Avoid high-nitrogen fertilisers, which promote leafy growth at the expense of blooms.
Watering: Water regularly during the establishment period. Once established, Wisteria ‘Mercury’ is drought-tolerant but will flower best with consistent moisture in well-drained soil.
Pest Control: Generally low-maintenance, but watch for aphids, scale, or mealybugs on young growth. Treat infestations early with insecticidal soap or neem oil.
Disease Management: Ensure good airflow and support the plant on a strong structure. Avoid overhead watering to reduce fungal risks such as leaf spot or powdery mildew. Plant in free-draining soil to prevent root rot, especially in cooler months.
Enjoy complimentary delivery anywhere in mainland New Zealand when you purchase plants worth $250 or more*.
For orders below $250, the following flat-rate delivery charges are applicable:
- Urban delivery within mainland New Zealand: $19.95
- Rural delivery within mainland New Zealand: $39.95
- Waiheke, Chatham and Great Barrier Islands: Please contact us for shipping options.
We aim to have all orders shipped within 14 days from the order date, unless a different shipping date is specified alongside a product.
