Perennial · Cistaceae family
Common rock-rose
Helianthemum nummularium
In short a 10-second read
spacing 11¾ in
Where to plant and how much to water
Sun, soil and water.
It grows best in full sun, in dry to average soil.
Sun
Soil
Watering
Frost
How much space it takes
Mature size.
The mature plant next to a person (69 in).
Plant 11¾ in apart.
Reaches maturity in about 5–10 years. The final size depends on the cultivar and the spot — we give the range from smallest to largest.
Calendar
Through the year.
Typical for a temperate climate (four seasons). The line shows the current month.
The year at a glance
Flowers
May–July · yellow, pink, red or white
Planting
container plant: March–May, September–November
Feeding
March–May
Feeding
Nutrition.
Pests and diseases
Common problems and what to do.
The most common problems in Central Europe. Protection is listed from the gentlest option.
No serious pests or diseases
The source lists no significant problems.
Sources (2)
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 common rock-rose flower?
In May–July; the flowers are yellow, pink, red or white.
Does common rock-rose tolerate shade?
No, it needs full sun.
How much space does common rock-rose need?
At maturity 9⅞ in–2 ft wide and 5⅞ in–11¾ in tall; recommended spacing 11¾ in.
Sources (10) Checked 23 October 2026
- missouribotanicalgarden.org
- rhs.org.uk 2
- bamberger-staudengarten-shop.de 2 3
- yardandgarden.extension.iastate.edu
- Invasive plant lists — this species is not on them: Slovakia, Poland, Denmark
Similar plants
Have a look at these too.
Uses