Turtlehead
Chelone
Also comes in white.
Turtlehead blooms from August through September.
This entry comes from our curated library and has not yet been independently checked against outside sources. Curated is not unreliable: a standing audit keeps every entry internally consistent, and the source-by-source check is working through the whole library in the open.
Growing Turtlehead
Plant it in part sun. It prefers high water. It is hardy in USDA zones 3–8. Expect it to reach about 3 ft tall and 1.6 ft wide at maturity, in roughly 2 years.
When to plant Turtlehead
Plant Turtlehead in early spring as soon as the soil is workable, or in early fall at least six weeks before your first frost, so roots establish in cool weather. For the middle of its hardy zones 3 to 8 range, spring means April to June and fall means August or September. Once settled, it blooms from August to September.
Month-by-month timing for your zone is on the planting calendar: for the middle of its range, start with zone 5 in April.
Good to know about Turtlehead
Curated from university extensions, botanic gardens and other primary sources, with the source named on every note.
Worth knowing
White turtlehead is the main native host plant for the Baltimore checkerspot butterfly: females lay eggs on it and the caterpillars feed on the leaves. per NC State and Penn State
Drought tolerance is disputed
Wisconsin says established plants tolerate drier soil; NC State says it needs steady moisture. Keep it moist to be safe: dry stress brings mildew and flop. per Wisconsin and NC State
Built for bumblebees
The nearly closed flower shuts out small bees; only strong bumblebees pry it open and buzz the anthers, one removing over 36 percent of the pollen per visit. per Journal of Pollination Ecology and NC State
Pinch back for sturdy stems
Cut the stems back by about half in late spring for a bushier, shorter plant that stands up without staking. It still blooms and needs no deadheading. per NC State and Penn State
Deer and rabbit resistant
The bitter foliage makes deer and rabbits mostly leave it alone, though Wisconsin notes browsing varies by place and species, so resistance is not absolute. per NC State and Wisconsin
Named for a turtle
The flowers look like a turtle's head with its mouth slightly open; the genus name Chelone is Greek for turtle. per NC State
What pairs well with Turtlehead
Good companions share its growing conditions and add something it lacks: an earlier or later bloom, a lower carpet in front, or structure through winter.
Joe Pye Weed
Takes full sun to part sun and high water; both are strong pollinator plants; its seed heads stand through winter, for structure and the birds; taller at 5.9 ft, for the layer behind it.
Goatsbeard
Takes part sun to part shade and moderate to high water; blooms in early summer, before this one opens; both offer pollinator forage, in different months; taller at 3.9 ft, for the layer behind it.
Summersweet
Takes part sun to part shade and high water; opens in midsummer and overlaps into this one's season; both are strong pollinator plants; taller at 5.9 ft, for the layer behind it.
Hellebore
Takes part sun to part shade and moderate to high water; blooms in late winter, before this one opens; both offer pollinator forage, in different months; evergreen, so the bed keeps its shape through winter.
Spirea
Takes full sun to part sun and moderate to high water; blooms in late spring, before this one opens; both offer pollinator forage, in different months; echoes the pink.
Climbing Hydrangea
Takes part sun to part shade and moderate to high water; blooms in early summer, before this one opens; both offer pollinator forage, in different months; a soft color beside the pink.
Asiatic Lily
Takes full sun to part sun and moderate to high water; blooms in early summer, before this one opens; both offer pollinator forage, in different months.
Flowering Crabapple
Takes full sun to part sun and moderate to high water; blooms in mid spring, before this one opens; both are strong pollinator plants, and they feed in different months; stands well above at 20 ft, a canopy to plant beneath.
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