How to Fertilize Lathyrus odoratus 'Lady Grisel Hamilton'?
High-potash sweet pea feed every two weeks through flowering season

Lathyrus odoratus 'Lady Grisel Hamilton' · Lathyrus odoratus 'Lady Grisel Hamilton'
Grow in humus-rich, fertile, well-drained soil in full sun or light dappled shade. Provide support and feed with a balanced liquid fertilizer every two weeks when in growth. See sweetpea cultivation for more detailed advice
High-potash sweet pea feed every two weeks through flowering season