How to Fertilize Hypericum × dummeri 'Peter Dummer'?
Apply a balanced slow-release fertilizer in early spring.

Hypericum × dummeri 'Peter Dummer' · Hypericum × dummeri 'Peter Dummer'
Grow in moderately fertile to poor, moist but well-drained soil in sun or partial shade.
Apply a balanced slow-release fertilizer in early spring.