Red-hot Poker Royal Castle A magnificent red-hot poker grown for its striking ‘poker’ flower-heads, Kniphofia uvaria Royal Castle is a clump-forming, evergreen to semi-evergreen perennial with strap-shaped, deep green leaves. The splendid flower-heads, borne from late June to August on sturdy stems, open brilliant fiery red, slowly fading from the base to yellow, as the long, tubular florets age. Red-hot poker Royal Castle is a good feature plant for sunny beds and borders, and excellent in Mediterranean or gravel plantings, particularly in coastal areas. Drought-hardy once established. Site: Tolerates exposure, including coastal exposureSoil: Light, well-drained, humus-rich, slightly acid to neutral soil, preferably moistPosition: Full sunSeason of interest: June to August in particularHardiness: Fully hardyHeight: 3’ (90cm) Spread: 2’ (60cm)