Heuchera Primo Mahogany Monster

Available late June

Heuchera 'Mahogany Monster' courtesy of Walters Gardens

Coral Bells

'Heuchera 'Mahogany Monster' has massive glossy, mahogany red leaves that form a substantial clump of foliage. Slightly ruffled leaves can grow up to 15 cm wide. The flower stems are proportionate to the size of the clump: very thick reaching over 75 cms. The burgundy stems holds masses of light pink buds with cream flowers. Although the color is consistent throughout the season, older leaves become more coppery with age.

  • Height: 30-41 cm (12-16 in)
  • Spread: 56-71 cm (22-28 in)
  • Cold Hardiness: Zone 4-9
  • Sun or Shade: sun to shade
  • Bloom Time: mid summer
  • Leaf Colour: burgundy
  • Bloom Colour: light pink
  • Nature Attraction: bees, butterflies and hummingbirds

Growing and Maintenance Tips

Heucheras are easy to grow and fit nicely in the front of any border, rock garden, or container. They grow most vigorously and have the most intense colours when grown in partial shade (preferably afternoon shade). They can also be grown in more shade but their growth rate will be very slow.  The soil should be amended with organic matter prior to planting. It should also have good drainage and a neutral pH. If properly sited out of the way of winter winds and with reliable snow cover, Heucheras may be evergreen. If the plant looks tattered by early spring, shear off any damaged leaves to make room for the vibrant new foliage which will fill in quickly.
Heucheras can be grown under Black Walnut trees because they are resistant to the toxin Juglone which the trees emit from their roots. Heucheras are also salt tolerant. They are useful in the north along pathways which are salted. Occasionally in northern regions, Heucheras have a tendency to heave out of the ground because of the freeze/thaw cycle. To combat heaving, add an extra layer of compost around the plant's roots in the fall. In the spring, if the plants have heaved at all, the new roots will grow into the fresh new layer of compost.