Grass · Poaceae family
silver spike grass
Stipa calamagrostis
In short a 10-second read
Silver spike grass (grass) grows to 0.5–0.9 m tall and 0.8 m wide when mature. It grows best in full sun, in dry soil. Hardy to −23 °C.
× spread 0.8 m
Where to plant
Sun, soil, frost.
It grows best in full sun, in dry soil. Hardy to −23 °C.
Sun
Elsewhere it will grow less well.
Soil and water
dry · watering: little
Soil: loamy, humus-rich
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
Pruning
cut back to the ground (February–March)
Planting
container plant: March–May, September–October
Winter protection
not needed
Overwintering
It copes with winter on its own.
It overwinters outdoors without protection, hardy to −23 °C.
- Needs no protection
- Hardy to −23 °C
- Dies back in winter and regrows in spring
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.
Does silver spike grass tolerate shade?
No, it needs full sun.
How much space does silver spike grass need?
At maturity 0.8 m wide and 0.5–0.9 m tall; recommended spacing 80 cm.
Does silver spike grass survive winter outdoors?
Yes, without protection, hardy to −23 °C.
Where the data comes from
The data is indicative — we are still comparing it with further sources. Last checked 28 September 2026.
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