Identifying Yellow Loosestrife (Lysimachia punctata): A Vigorous June Bloomer

Key Identification Features

Tall central stem with whorls of bright yellow flowers held close to the stem. Blooms in June. Hardy zones 3–4.

Growth Habit and Hardiness

Spreads aggressively by rhizomes. Can become invasive in moist soils.

Potential Invasiveness Concerns

Monitor and contain. Remove unwanted shoots promptly.

Reputable Information Sources

• Image reference
• WSU plant profile