An ideal native perennial for shade in dry gardens
They crouched at the toe of a north-facing cliff, all hearts and flowers in a mass of pink.
It flew by so fast I was unable to look closely, so I parked and hiked back to the rock face. Fine land slide material had built up over many years in one spot, just inches at the toe. In this well-drained, relatively infertile mineral soil grew the Pacific bleeding heart (Dicentra formosa). It was my first view of the plants in habitat, a very curious place for an understory perennial to grow.
The plant was large, so it had been growing there a long time. The species, like many herbaceous California perennials, dies back with late summer drought, then flourishes again with the rains. That means it liked it right there, and if we create similar conditions with northerly exposures and rapid drainage, the species becomes an ideal native perennial for shade in the dry colourful garden.
The bleeding heart I knew in horticulture is native to China, where it was taken from the mountains and planted in gardens early on. It did not come west until Scottish botanist Robert Fortune gathered one from a mandarin’s garden around 1850, and sent it to Britain’s Kew Gardens. The Victorian rage for anything sentimental made the heart-shaped flowers wildly popular in gardens. Naturally this was shared in America, where division made them easy to multiply.
Since then it has become a beloved plant, with sentimentally shaped flowers appealing to just about everyone. The long sprays of dangling magenta hearts on thin wands are charming as they bob and sway in the breeze, although it’s not a wind-tolerant plant. It is, however, the best choice for spring beauty around large shade trees where ferns and sedges thrive.
The results of European breeding have resulted in superior varieties. The long-time garden favourite is the variety ‘Luxuriant,’ which is a big beautiful plant widely used by the landscape industry.
The Dutch have been breeding Dicentras for some time now, seeking hybrid variations in the plants to start a new named form. Many are the results of crossing Dicentra spectabilis (Zone 3) with Dicentra formosa. Others are the result of crossing their offspring. This intensifies the genes that hail from two continents separated by the Pacific. It is also remarkable that both species evolved separately to become so similar. This makes it possible for the dominant drought-resistant genes of the native to be more easily transferred on to the next hybrid generation.
The roadside plant in alluvial deposits is not typical for Dicentras. They live in a woodland environment where there is a porous duff layer on top of the soil. Use bleeding heart as a problem solver. Bring colour to barren side yard views along with very early bulbs. Plant them around trees to share their natural duff. It’s traditional in China to plant bleeding hearts in conjunction with rock work, perhaps because they are found in the wild in such associations.
In times of drought, consider growing native Dicentra formosa for a beautiful plant that thrives during the rainy season, then dies back to the ground for heat of fall.
The species may be difficult to find, but it’s worth the hunt. You’ll agree when such delicate beauty jumps out of winter with hearts and flowers to announce the arrival of a drier than average spring.