Crop Rotation Group
Miscellaneous
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Soil
Well drained fertile soil.
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Position
Full sun to light shade.
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Frost tolerant
This hardy perennial is winter hardy to -40F (-40C).
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Feeding
None generally needed.
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Companions
-
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Spacing
Single Plants: 1' 5" (45cm) each way (minimum)
Rows: 1' 3" (40cm) with 2' 11" (90cm) row gap (minimum)
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Sow and Plant
Start with a purchased plant, or sow tansy from seed. These vigorous plants spread and reseed, so it is best to start with only one plant, and grow it as a managed clump. Locate in a spot where you can mow around the clump to further manage its spread.
Our Garden Planning Tool can produce a personalized calendar of when to sow, plant and harvest for your area.
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Notes
Tansy is an eager spreader wherever it is grown, but it is such an aggressive reseeder in some climates that it is listed as a noxious weed. Growing tansy is prohibited in Colorado, Minnesota, Montana, Wyoming, and parts of the state of Washington, as well as the Alberta and British Columbia provinces in Canada.
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Harvesting
Harvest leaves when needed, and expect flower clusters in late summer. Cut back plants close to the ground in early spring.
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Troubleshooting
Tansy leaves can cause contact dermatitis in sensitive people, and the plants are poisonous to some animals when eaten.
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