Thrive in full sun to partial shade with well-draining, compost-amended soil. Plant in early spring after last frost or fall for optimal blooms in cooler temperatures. Keep soil consistently moist (not waterlogged) with base watering to prevent fungal disease. Pinch young plants for bushiness, deadhead regularly for extended flowering, and mulch to maintain moisture and temperature. Stake taller varieties for support. Prefer cooler weather and afternoon shade in extreme heat. Susceptible to root rot—ensure excellent drainage.