Posted: 10/04/2016 at 14:25
I know they are greedy plants and need good nutrients in the soil. RHS says "Grow sweet peas in fertile, well-drained, humus-rich soil and in full sun or very light dappled shade. For best results, incorporate organic matter such as garden compost or well-rotted manure at least four weeks before planting and apply a general fertiliser, such as Vitax Q4 or Growmore, at the manufacturers' recommended dose. After planting, water the plants well during dry spells."