Ninebark - Physocarpus

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Ninebark (Physocarpus opulifolius) is an exceptionally hardy, fast-growing native shrub perfect for Southwestern Ontario landscapes. Thriving in hardiness zones 2–7, this low-maint enance plant features striking exfoliating bark, delicate spring flowers, and vibrant seasonal foliage that shifts throughout the year. Highly adaptable to clay, loam, sandy, and rocky soils—including heavy clay common to the region—Ninebark performs best in full sun to partial shade. Once established, it becomes remarkably drought-tolerant and pollution-resistant, making it ideal for naturalized gardens, borders, and mixed plantings. Plant in spring or fall with 6–10 feet spacing. Water regularly during the first season to establish deep roots, then enjoy minimal maintenance. Light pruning after flowering keeps the shrub shaped and vigorous. No fertilizer needed—a spring compost layer is sufficient. Perfect for gardeners seeking a native, resilient shrub that thrives with little intervention. Show more