Sidalcea 'Elsie Heugh' | Thompson & Morgan From early summer Sidalcea 'Elsie Heugh' bears upright flower spikes of satiny, purple-pink blooms with delicate scalloped edges. Sidalcea is a well behaved, upright perennial, forming neat mounds of rounded foliage. Prairie Mallow is ideal for filling gaps in perennial borders and makes a lovely cut flower too. This well known variety has been awarded a coveted RHS AGM for its excellent garden performance. Height: 90cm (36"). Spread: 45cm (18").