Growing Gillenia

Gillenia is a genus of two hardy perennial species native to open woods and rocky slopes with fertile soil in eastern and southern North America. These low-maintenance plants are somewhat drought-tolerant, unbothered by deer, and suited for Zones 4-8.

Light: Full sun to part shade including dappled light. Plants benefit from a bit of shade during the hot afternoon in warmer areas.

Soil: Rich, moist, well-drained soils, with high organic content; neutral to slightly-acidic pH. Mulch with leaves, hardwood bark, or Pine bark chips.

Watering: Moderate water needs if planted in moisture-retentive soil. Water deeply in times of drought or extremely hot weather, especially in sunnier locations. Plants are moderately drought-resistant once established.

Fertilizer: Like many native woodland plants, when grown in conditions similar to those of their native habitat, Gillenias do well with just compost, particularly decomposed leaves. If you feel that fertilizer is necessary to promote growth and blooming, apply a slow-release granular fertilizer, preferably organic, sparingly in spring.

Pests/Diseases: No serious insect or disease problems, although slugs my occasionally dine on leaves.

Dividing/Transplanting: These clump-forming plants can be divided, but that is not required, unless plants get congested or you wish to make more plants. To divide, on an mild overcast day, simply dig up the entire clump, brush off excess soil and cut through the root ball with a sharp knife, saw, or shovel (make sure that each division has roots and stems with leaves). Re-plant in the desired location with a little added compost, then water well. Dividing and transplanting can happen in spring, but is best done in early fall, so that plants can recover before winter without affecting the next season’s blooming.

Companions: Gillenias are lovely underplanted with low carpets of native plants such as Creeping Phlox (Phlox stolonifera) and Foamflower (Tiarella cordifolia). Hellebores, with their bold dark green leaves, contrast beautifully with Gillenia’s delicate sprays of pink or white flowers.

Continuing Care: Almost no care is required by these plants. An inch or two of compost or decomposed leaves in spring is beneficial. These semi-woody plants stand up well to winter and add interest through the cold season if left standing. Cut back old stems in spring to make way for new growth.