A stunning, versatile and easy to grow garden choice, Tiarella wherryi (Wherry’s Foamflower) ground cover features a lush clump of heart shaped, lobed green leaves with reddish purple veining that turn bronze in the colder months. In late Spring, attractive pinkish white star-shaped flowers are borne on slender stems that will last through the Summer and delight the bees – especially if you cut back spent flower stems to encourage new blooms.
Semi-evergreen, with some of the foliage dying back in Winter, Tiarella wherryi make a lovely colourful low growing addition to the front of mixed beds and borders or woodland shadier areas where some other plants would not thrive, they also make a great container plant. Highly effective as a weed supressing ground cover carpet if planted in groups, they will provide near year-round colour with the added interest of their plume stalks of delicate flowers from late Spring through to early-mid Summer (trim these flower stalks down to their base when they have gone brown and the plant will continue to produce flowers – though with less regularity towards the end of their flowering season). Try planting with contrasting colours of Heuchera, with Rudbeckia, or under Acers with Hosta and smaller grasses.
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Tiarella wherryi ground cover are semi-evergreen except in very harsh Winters when their leaves and foliage die back to ground level. They prefer dappled or semi-shaded locations. One thing they do require is moist but well-drained soil until established, when they will tolerate slightly drier soil. They will not thrive in soil that becomes waterlogged so add grit and well-rotted compost to clay soils before planting. To maintain them simply cut back any tatty or brown foliage from the previous year in early Spring and divide any clumps that become congested in early Spring or late Autumn.
How to grow Tiarella wherryi
Position: Dappled shade, partial shade
Foliage: Semi-evergreen, palmate shaped leaves may die back in Winter but reappear from Spring
Soil and site: Fertile, moisture retaining & well drained
Flowering time: Late Spring through to mid-late Summer
Growth rate: Moderate
Ultimate height and spread: 30cm and to 30cm
Hardiness: Hardy once established
Aftercare: Water well until established, avoiding soil becoming waterlogged. Trim off any dead/straggly areas after flowering has finished. Divide clumps in early Spring or late Autumn if they become congested