Clematis Wilt: Cut Out Affected Stems, Spray Fungicide

A gardener's clematis stem turned black and collapsed in a week—classic clematis wilt. Asks for fungicide (Benomyl banned).

Immediate Action

1. Cut off affected stem below the blackened area.
2. Spray remaining foliage/stems with a general rose/flower fungicide (e.g., Scotts Funginex, Immunox, or copper-based).
3. If spread continues, cut entire plant to ground—it will often resprout from crown.

Prevention

• Plant deeply (crown 2-3 inches below soil).
• Keep roots cool (mulch, underplant).
• Water at base, not foliage.
• Choose resistant cultivars (Viticella group, 'Jackmanii').