How to Fertilize Clematis × diversifolia?
Balanced clematis feed monthly in spring, higher potash before bloom

Clematis × diversifolia · Clematis × diversifolia
Plant in a moisture-retentive, well-drained soil in sun or partial shade; keep the base of the plant and the roots cool and shaded by other plants or a layer of pebbles or flat stones at the base See clematis cultivation for more advice
Balanced clematis feed monthly in spring, higher potash before bloom