How to Fertilize commonName:"delphinium 'Blauwal'"?
Apply a high-phosphorus fertilizer every 2-3 weeks during the growing season.

commonName:"delphinium 'Blauwal'" · Delphinium 'Blauwal'
Grow in fertile, well-drained soil in full sun. Shelter from strong winds and provide support (see staking: perennials). Divide every 2-5 years to maintain vigour. See staking: perennials and delphinium cultivation for further advice
Apply a high-phosphorus fertilizer every 2-3 weeks during the growing season.