Turtlehead
Chelone obliqua
Late-summer color for the damp, half-shaded corner where most border plants sulk.
Spacing & sowing
- Plant spacing
- 17.7 in
- In-row spacing
- 17.7 in
- Between rows
- 19.7 in
- Square-foot density
- Not suited to SFG
Growing
- Type
- Flower · Perennial
- Botanical family
- Mixed / other
- Sunlight
- Takes full sun or part shade, and puts up with more shade than most border plants.
- Watering
- Never let it go dry — this is one for the damp end of the border.
- Feeding
- A balanced fertilizer in spring is all it asks for.
- Frost tolerant
- Yes
- Flowering
- August
- Pruning
- Cut the stems down in late autumn, or leave them standing until early spring.
Through the year
- Mar–Apr Spring Growth
- Apr–Aug Bud Break
- Aug–Oct Flowering
- Oct–Nov Growing
- Nov–Dec Winter Dormancy
- Jan–Mar Winter Dormancy
Companions
Lobelia cardinalis, Eupatorium, Persicaria amplexicaulis, Molinia grasses
Pests & problems
Garden allies
Beneficial predators that hunt this plant's pests — grow their favourite flowers nearby to recruit them. companion plant
- Beneficial nematodes Steinernema & Heterorhabditis spp.Hunts Slugs & snails
Microscopic worms watered onto damp soil that hunt down soil-dwelling grubs and release a bacterium that kills them within days. Timing is the whole thing: warm, damp soil and a small target grub, which means late summer for most of what they are used against.
- Centipedes ChilopodaHunts Slugs & snails
Flat, fast, one pair of legs to a segment — and a predator, unlike the slow round millipede it is constantly confused with. It hunts slugs, cutworms, springtails and woodlice by night under mulch and stones. Learn the difference and leave this one alone.
- Frogs & toads AnuraHunts Slugs & snails
A resident toad works the beds every night for slugs, cutworms, and weevils. Recruit them with water — even a sunken basin pond — plus damp shade and an upturned-pot toad house; skip the slug pellets that poison their prey.
- Garden birds PasseriformesHunts Slugs & snails
Both things are true: birds strip your currants and a brood of blue tits takes several thousand caterpillars out of one fruit tree in a fortnight. Net what you must and welcome them everywhere else — a nest box near the apples is worth more than a spray.
- Ground beetle CarabidaeHunts Slugs & snails
Fast, glossy night hunters that patrol the soil surface for slugs, cutworms, and root-fly larvae. Give them daytime cover — thick perennial edges, stepping stones, a log — and skip the tillage that wrecks their burrows.
- Hedgehog Erinaceus europaeusHunts Slugs & snails
A European animal, and worth saying so plainly: there are no hedgehogs in North America, and the ally that does the same night shift here is the toad, the opossum or the ground beetle. Where they do occur, cut a gap in the fence and skip the pellets.
- Rove beetle StaphylinidaeHunts Slugs & snails
Slim, quick beetles with short wing cases that hunt in soil and litter, taking root-fly eggs and larvae, fungus-gnat larvae, and mites. Mulch and undisturbed ground keep them resident year-round.
- Salamanders & newts CaudataHunts Slugs & snails
Damp-loving hunters of slugs, worms, woodlice and beetle larvae that spend the day under a log or a stone and work the beds at night. Companions to the toads: they want the same damp shade, the same log pile, and the same absence of slug pellets.
- Snakes & lizards Colubridae & PhrynosomatidaeHunts Slugs & snails
A garter snake works the beds for slugs and voles and a fence lizard clears grasshoppers off a sunny wall. Almost every snake a gardener meets is harmless and useful; give them a log pile, a warm flat stone and a bit of cover and they stay.
The Cottage Garden Companion — the gardener's herbarium at cottagegardencompanion.com