Basil 'Crimson King' is so named for its unusual colour. The half-hardy annual's leaves are unremarkable in shape, for they are traditionally cupped in appearance, but notable for their purple tone. This vibrant alternative to green basil is thus an excellent, ornamental herb while still performing well in terms of function and flavour. Ocimum basilicum grows vigorously, whether sown in a vegetable bed or on a windowsill, making it a practical way to spruce up salads, garnishes and other culinary creations even with limited garden space.