Plant Profile: Euphorbia amygdaloides subsp. robbiae

Wood Spurge is a robust, herbaceous perennial shrub that thrives as an evergreen, showcasing vibrant yellow-green flowers in the spring. This compact, bushy plant typically forms an upright mound, reaching heights of 12 to 20 inches. It has a tendency to produce new plants through runners, making it a popular choice for ground cover. When planting, it is advisable to space the plants 18 inches apart to avoid overcrowding.

This plant flourishes in dry to medium, loose, well-drained soils and prefers full sun to partial shade. However, it is sensitive to overly wet conditions, particularly in winter, which can lead to its demise. In areas with hot summer days, it benefits from afternoon shade, but excessive shade can cause the attractive clumps to become sparse. Wood Spurge is resilient and can thrive in poor soil conditions, including rocky and sandy environments.

The plant is capable of self-seeding in the garden unless the spent flowers are removed before they set seed.

A notable subspecies, robbiae, also known as Mrs. Robb’s Hatbox, distinguishes itself from Euphorbia amygdaloides by featuring broader, dark green leaves arranged in rosettes and exhibiting a more vigorous rhizomatous growth. This rapid spread makes it an excellent option for ground cover.

Regarding pests and diseases, Wood Spurge, native to Mediterranean climates, may experience stress during hot and humid summers. Fortunately, it does not face significant issues with insects or diseases. It is recommended to wear gloves when handling this plant to prevent skin irritation from its toxic sap.