Heuchera PRIMO™ 'BLACK PEARL'

Heuchera PRIMO™
Heuchera PRIMO™ 'BLACK PEARL'
coral bells
SIZE/TYPE low perennial
USUAL HEIGHT 0.2-0.5m
USUAL WIDTH 0.3-0.5m
LEAVES semi-deciduous broadleaf
COLOUR OF LEAVES burgundy red
FLOWERS less showy but noticeable
COLOUR OF FLOWERS
BLOOMING TIME
LOCATION full sun to shade
USDA zone (lowest) 4   (down to -34°C)
WINTER PROTECTION  
FOR ZONE 5+6 Code of winter protection zone 5+6
FOR ZONE 7 Code of winter protection zone 7
BELONGS TO CATEGORIES Perennials
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Many breeders have their Holy Grail in achieving two colours: true blue or pure black colour. That means colours which are very rare in the wild. Hans Hansen from Walters Gardens in Michigan is one of the lucky ones. In 2013 he managed to hybridize a coral bells variety whose leaves are almost black. It was named Black Pearl and added to the PRIMO™ series. Patent No. PP29395 was issued in 2018.

Black Pearl coral bells produces very dark burgundy, almost black leaves with rosy purple undersides. Leaves are large and glossy, with rounded and slightly ruffled lobes. From early summer appear 40-50 cm tall stems of dark red colour holding an upright panicle of small, white flowers with pink calyxes. They can be cut off if only beautiful foliage is what you desire. Leaves show good resistance to mild frost and are quite nice even in winter. It performs better in full sun, in shaded areas the leaves turn deep green rather than black.

Coral bells can take almost any soil with ample moisture and good drainage. They do best in partial shade or filtered sun, however, if you make sure they will not dry out you can place them in full sun, too. They can also live in dark shade where their colours will not be too rich, such location is usually best for light coloured varieties. Cut off all leaves in early spring to encourage growth of new foliage. Fully hardy to abt. -34°C (USDA zone 4), and suitable for outdoor pots.

Last update 04-01-2019
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GLOSSARY
  • STANDARD QUALITY - Plants of this group are 1st class quality with number of branches and overall density adequate to their size and age, considering they were container grown.
  • DE LUXE QUALITY - This label guarantees a luxurious quality of manually selected plants that, compared to their height and age, are exceptionally dense and beautiful.
  • EXTRA - These plants are usually mature and bigger specimens with exceptional overall appearance.
  • STANDARD (as described in the plant form) means a tree with a trunk of 190-210 cm and a crown at the top, unless specified differently. The commercial size for trees is their girth measured in the height of 1m from ground.
  • HOBBY - These plants are of the same quality as our standard-quality plants but younger and therefore cheaper.
  • SHRUB - a woody plant with branches growing bushy from the ground level.
  • HALF-STANDARD or MINI-STANDARD - a small tree with shorter trunk, its size is usually specified.
  • FEATHERED - These are trees with branches growing already from the base of the trunk and up along the stem.
  • GRASSES and PERENNIALS - Sizes given usually read the diameter of the pot or the clump, as specified.
LARGE PLANTS over 150 cmspecimens, screening and hedging shrubs

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