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AGM plants have been through a rigourous trial and assessment programme. They are:
© � RHS 2002
Other common names
Blue oat grass
Avena candida Avena sempervirens
Helictotrichon can be deciduous or evergreen grasses, forming compact tussocks of linear leaves, with erect or arching stems bearing panicles of flowering spikelets in summer
Poaceae / Poaceae
H. sempervirens is a dense tufted evergreen grass with rather rigid blue-grey leaves to 23cm in length. Small, straw-coloured spikelets are borne in large open panicles on erect stems to 1.4m in height
All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets
While we update our systems with the new hardiness ratings you may still see old hardiness ratings in your search results. These are denoted as 'Old'.
For full details of the hardiness ratings see
Aspect South-facing or North-facing or West-facing or East-facing
Exposure Exposed or Sheltered
MoistureWell-drained, Moist but well-drained
SoilLoam, Chalk, Sand, Clay
Grow in poor to moderately fertile, neutral to alkaline, well-drained soil
Propagate by division in mid-spring
Suggested planting locations and garden types
Flower borders and beds Low Maintenance
Remove dead foliage and old flowered stems in spring
Generally pest free
May be affected by a rust
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