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

Clematis repens · Clematis repens
Plant in a moisture-retentive, well-drained soil, with the roots and base of the plant kept cool and shaded by other plants or a layer of pebbles at the base. See clematis cultivation for further information. Its trailing stems make it ideal for growing through plants in the herbaceous border
Balanced clematis feed monthly in spring, higher potash before bloom