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Darkest purple blooms – famous for its deep, reddish-purple flowers that are pale pink inside, offering a dramatic, moody colour for spring borders Repeat flowering – often produces a main flush of flowers in late spring and then sporadically blooms again throughout the summer, extending the season How to grow – plant in moisture‑retentive, free‑draining soil in sun or light shade with shelter from cold winds. Keep the soil evenly moist and protect early buds from late frosts Deciduous perennial – RHS H6 hardy, tolerates temperatures to approx. -20°C; drops foliage in winter and produces new growth when conditions improve Garden-ready plant – one well‑rooted 4L pot‑grown specimen, securely packaged without its nursery pot and ready to plant into prepared ground when local conditions allow