Perennials That Are Juglone-Tolerant

Full Sun

• Full-sun sites receive direct sunlight for more than six hours a day. Hollyhocks, common in these zones, tolerate juglone. These long-lived perennials grow 2 to 6 feet tall and are hardy in U.S. Department of Agriculture Plant Hardiness Zones 3 to 8. Hollyhocks bloom from June through August with large, pink, yellow, red, purple and white flowers. Hollyhocks prefer full sun and well-drained soil. Garden phlox also tolerate juglone and prefer sites with full sun and moist, rich soil. Garden phlox grow 3 to 4 feet tall and bloom from summer to fall, with blossoms ranging from blue to red. Hardy in USDA hardiness zones 4 to 8, garden phlox thrive with regular applications of fertilizer.

Light Shade

• Light-shade sites receive direct sunlight for five to six hours per day or receive a shifting, equal pattern of sun and shade. Heuchera, or coral bells, thrive in light shade and resist juglone. These mounding perennials grow up to 18 inches tall and produce abundant pink, red and orange flowers from late spring through midsummer. Coral bells grow in zones 3 to 8 and prefer moist, well-drained soil. Bee balm also grows in sites with light shade and moist, well-drained soil. This juglone-tolerant perennial blooms from spring to late summer with red, pink and purple flowers. Plant this 2- to 4-foot tall plant in zones 4 to 9.

Partial Shade

• Partial-shade sites receive less than four hours per day of direct sunlight or a dappled pattern of sun and shade. European wild ginger prefers partial shade and tolerates juglone. This little perennial grows up to 8 inches tall and has attractive, glossy foliage. Hardy in zones 4 to 7, European wild ginger requires moist soil.

  Sweet woodruff can also grow in partial shade under juglone-producing trees. This perennial ground cover blooms with small, white spring flowers and has fragrant foliage. Sweet woodruff grows up to a foot tall and is hardy in zones 4 to 8. Plant in moist, well-drained soil.

Full Shade

• Full-shade sites don't receive direct sunlight, but do get reflected light. Bugle weed tolerates sites with both juglone and full shade. This small perennial grows from 4 to 12 inches tall and can be grown as a ground cover. Bugle weed blooms in spring with lavender flowers and prefers moist, well-drained soil. Bugle weed is hardy in zones 3 to 9. The wood anemone also prefers full shade and thrives in moist, well-drained soil. This juglone-tolerant perennial grows 4 to 8 inches tall and produces white spring flowers. The wood anemone has attractive foliage throughout the season and is hardy in zones 3 to 8.