Category Archives: winter flowering plants

Christmas Heather, Erica or Calluna?

Any plant that blooms during the shortest and darkest days of the year is a sure bet to get my attention.  Even when the weather is cold and rainy a Christmas heather will brave the elements and keep on blooming. Along with their relatives the true heathers,  they are great additions to the garden. You often see this variety grown as a holiday gift plant because the flowers last for such a long time.

Technically Christmas heather is actually a heath from the family ericacaea  which includes our native Western azalea, gaultheria, madrone and manzanita. Sound confusing? Is there a difference between a heath and a heather?

Heath or erica are mostly native to northern and western Europe. There are a few varieties from South Africa but these are not as hardy for cold temperatures. Christmas heather ( erica canaliculata ) is an evergreen, deer resistant shrub reaching about 6' tall and 4' wide. They tolerate heavy soil with little to occasional irrigation and do best if not over irrigated in the summer. Rosea is a popular winter-flowering pink variety while Rubra blooms with deep pink flowers. They are good on slopes.

Scotch heather (calluna vulgaris ) generally start blooming in mid-summer. The buds never open so remain colorful from August until hard frost. They are often grown close together in rock gardens making a colorful display of patchwork color.  Fields of mauve, pink and rose can be found all over Scotland and England where the shrub grows wild. There are over 700 cultivars now available with foliage colors of chartreuse, yellow, russet or grey being as showy as the flowers. Colors intensify in winter and provide as much visual impact as the summer flowers.

Heathers are not too particular about fertility but need good drainage. They are a good choice for the top of  retaining walls, banks or in raised planters where the soil drains well.  Acidic soils around the edges of a conifer grove would be ideal. They blend nicely with grasses for wild gardens and do well in large pots.

Where heathers grow wild they were used to create brooms and dusters. They were also used to pack crates of whiskey and other breakables for shipping and so were spread around early on and found their way to North America along with traditional brooms.

Flowers of all heaths and heathers make good cut flowers, lasting for weeks, whether or not the stems are immersed in water.

Both of these species have shallow root systems so be careful not to plant them too deeply. Good drainage is important and if your soil is heavy clay amend it with compost and peat moss or create a raised bed. Otherwise they prefer rocky or unamended soils and little fertilizer. Water regularly during the first year until the root zone has become established. Top dress with wood chips or other mulch.

To prevent them from becoming leggy and woody, prune right after they finish blooming be careful not to prune into bare wood but right below the dead blossoms.

By choosing varieties of both heaths and their close relative heather you can have color year round but the sight of the delicate blossoms in the drabbest months of the year is a most welcome addition to any garden.