Perennial · Lamiaceae family
woolly hedgenettle
Stachys byzantina
In short a 10-second read
Woolly hedgenettle (perennial) grows to 0.3–0.45 m tall and 0.3–0.45 m wide when mature. It grows best in full sun to part shade, in dry to average soil. It flowers in June–July; the flowers are pink or purple. Hardy to −32 °C.
× spread 0.3–0.45 m
Where to plant
Sun, soil, frost.
It grows best in full sun to part shade, in dry to average soil. Hardy to −32 °C.
Sun
Tolerates several positions — choose to suit the rest of the garden.
Soil and water
dry to average · watering: little
Soil: sandy, loamy, gravelly, clay
Soil pH 5.5–8
Frost
It copes with a normal winter outdoors.
How much space it takes
Mature size.
The mature plant next to a person (175 cm).
Next to a person
Reaches maturity in about 2–5 years. The final size depends on the cultivar and the spot — we give the range from smallest to largest.
Calendar
What to do and when.
Months for Central Europe. The line shows the current month.
The year at a glance
Flowers
June–July · pink or purple
Pruning
deadhead spent flowers (as needed)
Planting
container plant: March–May, September–November
Winter protection
not needed
Overwintering
It copes with winter on its own.
It overwinters outdoors without protection, hardy to −32 °C.
- Needs no protection
- Hardy to −32 °C
- Evergreen — green in winter too
What to combine it with
Same needs, different flowering.
They share the same sun and soil and flower in other months — so the bed flowers for longer.
Frequently asked
Quick answers.
When does woolly hedgenettle flower?
In June–July; the flowers are pink or purple.
Does woolly hedgenettle tolerate shade?
It tolerates part shade (3–6 hours of sun), but not full shade.
How much space does woolly hedgenettle need?
At maturity 0.3–0.45 m wide and 0.3–0.45 m tall; recommended spacing 33 cm.
Does woolly hedgenettle survive winter outdoors?
Yes, without protection, hardy to −32 °C.
Where the data comes from
We compared the data in 17 expert sources. Last checked 28 September 2026.
Show sources (17)
- NC State Extension Gardener Plant Toolbox — Stachys byzantina
- Missouri Botanical Garden Plant Finder — Stachys byzantina
- GBIF Backbone Taxonomy — Stachys byzantina
- GBIF Occurrence Search API — Stachys byzantina
- Wikidata (CC0) — Stachys byzantina
- Bamberger Staudengarten (Strobler), katalóg
- Sarastro Stauden
- RHS Plant Finder
- Foerster-Stauden, katalóg
- Iowa State Extension - How to Plant Perennials
- RHS - How to grow perennial plants
- Invasive plant lists — this species is not on them: EU, Slovakia, Czechia, Germany, Poland, Denmark
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