Clematis Not Flowering After 4 Years: Sun, Fertilizer, Pruning

Ensure 6+ hours of sun. Use low‑nitrogen fertilizer (5‑10‑10 or rose food). Mulch roots to keep cool. Don't prune—it may be a late bloomer. Identify pruning group (1, 2, or 3) once it flowers. Patience and proper feeding usually bring blooms.