Myrtle spurge (Euphorbia myrsinites) is a distinctive, appealing plant for diverse landscapes. Its succulent appearance and drought tolerance make it a favored choice for xeriscaping, rock gardens, or dry borders, popular for low-maintenance groundcover.
Myrtle Spurge Characteristics and Growth Habits
Myrtle spurge has thick, fleshy blue-green leaves arranged spirally around trailing, low-growing stems, forming a spreading mat. In spring, bright chartreuse-yellow bracts (often mistaken for flowers) add vibrant color, making it a unique ornamental.
As a low-growing, spreading groundcover, it effectively covers open garden areas. Its natural resilience allows it to withstand dry conditions, making it suitable for arid or water-wise landscapes, establishing readily with minimal intervention.
Essential Care Requirements
Myrtle spurge thrives in full sun, encouraging denser, more compact growth. While it tolerates partial shade, too much can result in leggy growth and less vibrant coloration. Ample sunlight ensures its characteristic bushy form and rich leaf hues, benefiting its appearance and health.
Myrtle spurge prefers well-draining, rocky or sandy soil. It dislikes rich, heavy, or waterlogged conditions, which cause root rot and plant decline. Amend heavy clay soils with grit or sand to improve drainage, foundational for its long-term health.
Once established, myrtle spurge is highly drought-tolerant with low water requirements. Infrequent watering suffices, even during dry periods. Avoid overwatering, a common cause of root rot and fungal diseases. Allow soil to dry completely between waterings to mimic its natural habitat and promote root health.
Pruning and Maintenance
Prune myrtle spurge to maintain shape, remove spent flower stalks, or manage size after blooming in late spring or early summer. Trimming stems keeps the plant tidy, encourages denser growth, and controls its spread.
Deadheading (removing spent flower stalks before seeds mature) is useful to prevent excessive self-seeding and spread. While it doesn’t eliminate all seed dispersal, it significantly reduces new seedlings. Integrate this into routine garden care to manage propagation.
Myrtle spurge does not require fertilization, adapting to lean, nutrient-poor soils. Excessive fertilization can lead to overly lush, weak growth. A balanced soil without rich amendments is sufficient, simplifying care as it needs no regular nutrient inputs.
Managing Spread and Environmental Considerations
Myrtle spurge is an aggressive, invasive species in several regions, including Colorado and Utah. It propagates through prolific self-seeding (seeds widely dispersed) and via underground rhizomes, forming dense colonies. Its vigorous growth outcompetes native vegetation, causing ecological concerns.
Manage its spread by consistent deadheading before seeds mature. Manually remove unwanted plants, including roots, to control existing populations. For new plantings, select locations where spread can be contained, like defined garden beds or containers. Where invasive, choosing native alternatives is more environmentally responsible.
Safety When Handling
All parts of myrtle spurge contain a milky white sap that can cause skin irritation (rashes, blisters, inflammation), especially in sensitive individuals. Avoid direct contact to prevent adverse reactions. Be aware of this before handling.
Wear protective gear when working with myrtle spurge, especially during pruning or removal. Gloves protect skin from sap; long sleeves protect arms. Eye protection (safety glasses) is advisable to prevent splashes, which can cause significant irritation. These precautions ensure a safer gardening experience.
If sap contacts skin, immediately wash the affected area thoroughly with soap and water. If sap enters eyes, flush with plenty of water for at least 15 minutes and seek prompt medical attention. Seek medical consultation for severe irritation or persistent symptoms after exposure.