Growing Hosta 'Sum and Substance' in a pot

Water hosta 'Sum and Substance' regularly during the growing season, especially in full sun positions or during dry spells. The large leaves lose moisture quickly, and the plant performs best with consistent soil moisture. Water deeply once or twice a week rather than little and often, aiming for the soil rather than the foliage to reduce slug attraction and disease risk. In autumn and winter, natural rainfall is usually sufficient. Feed in April, May and June to support the lush foliage. A balanced general-purpose fertiliser or one higher in nitrogen works well; apply according to the manufacturer's instructions, or use a top-dressing of well-rotted compost or manure in early spring. Avoid feeding after midsummer, as this can promote soft growth vulnerable to frost damage. Hostas are fully hardy in zones 3–9 and need no special winter protection. The crown will die back completely and re-emerge in mid to late spring. Refresh the mulch layer each spring to conserve moisture and suppress weeds. Slugs and snails are the primary pests, particularly damaging young emerging leaves in spring. Use your preferred control method—organic pellets, copper tape, beer traps, or night-time patrols—early in the season. 'Sum and Substance' has thicker, more slug-resistant foliage than many hostas, but protection is still worthwhile. Vine weevil can occasionally attack the roots; look out for notched leaf edges and treat the soil with biological controls if needed. Hostas are generally disease-free if given good drainage and air circulation.