California grey rush

Juncus patens | Also known as: California gray rush, Blue rush, Spreading rush | Rating: 0 votes | Print / Pdf

Run to get your spreading rush in time for spring!

One of the most common species of rush, juncus patens is also one of the most preferable due to its attractive dome-shaped habit. Its tall, lean stems are usually grey or blue-green in colour, thus the reason it is known by some as the blue rush, but its vigorous spreading trend means it is best known as the spreading rush. It thrives in marshy areas with its light brown six-tepalled flowers emerging in spring from the side of the stems rather than in spikes at the top. Spreading rush grows best in acidic, marshy soil, so it is perfect for ponds, lakes and stream banks. But it can also be planted in containers and maintained in city gardens.

Rate it:
Known dangers?
  • no
Height [m]
  • 0.3 - 0.6
Spread [m]
  • 0.3 - 0.45
Dominant flower colour
  • Brown
Flower Fragrance
  • No, neutral please
Flowering seasons
  • Late spring
  • Early summer
  • Mid summer
  • Late summer
Foliage in spring
  • Grey-green
Foliage in summer
  • Grey-green
Foliage in Autumn
  • Grey-green
Propagation methods
  • seed
  • division
Growth habit
  • Clump-forming
  • Acidic
  • Neutral
Hardiness zone
  • Z7-9
Heat zone
  • H9-6
Winter temperatures [°C]
  • -18 - -1
Heat days
  • 45 - 150
  • poorly-drained
  • boggy
  • water feature
Soil type
  • sandy
  • Clay
  • loams
Sun requirements
  • Full sun
  • Partial shade
  • Exposed
  • Sheltered
Standard category
  • Aquatic & semiaquatic plants
  • Semiaquatic plants
Grown for
  • Ornamental Foliage
Creative category
  • Kid Approved
  • For Beginners
  • Pond plants
Garden type
  • Bog garden
  • Containers
  • Pond
Gardening expertise
  • beginner
Time to reach full size
  • 2 to 5 years
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