Not edible
Toxic to dogs, cats and horses; sap can make skin sensitive to sunlight.
Yarrow
Achillea millefolium
Start yarrow indoors 9 weeks before your last spring frost, then plant out around your last spring frost. Space plants 12 in (30 cm) apart.
Photo: NPS Photo, Public domain · source
When to plant
Timed from your frost dates, so it holds wherever you garden. Give yours and every step below becomes a date.
Optimal Indoor Start
From seedRecommended- Start indoors9 weeks before your last spring frost
- Begin hardening off1 week before your last spring frost
- Plant outaround your last spring frost
Growing yarrow
- Spacing in the row
- 12 in (30 cm)
- Between rows
- 18 in (46 cm)
- Planting depth
- Surface sow or no deeper than 1/4 inch (needs light)
- Sun
- Full Sun
- Mature height
- 2-3 ft
- Hardy to
- USDA zone 3
- Life cycle
- Perennial
Feeding
- How often
- Rarely: it does best in lean, well-drained soil. Rich soil or fertilizer makes it spread fast and flop; a thin layer of compost in spring is the most it needs.
Your yarrow, planned to the day.
Canopy turns these timings into dates from your own frost data, places every plant at its spacing on your garden map, and tracks it all the way to harvest.