How to Fertilize clematis 'Ekstra'?
Low nitrogen feed in spring, higher potash before flowering

clematis 'Ekstra' · Clematis 'Ekstra'
Plant in a moisture-retentive, well-drained soil, with the crown 5-8cm deep to encourage new shoots to grow from below ground level; keep the base of the plant and the roots cool and shaded by other plants or a layer of pebbles or flat stones; best in partial shade because the colour tends to fade in full sun; see clematis cultivation for more advice
Low nitrogen feed in spring, higher potash before flowering