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June 2013
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Achnatherum Diegoense or San Diego needlegrass is a species of grass.

Images of Achnatherum Diegoense at

Achnatherum Diegoense is also known as San Diego needlegrass is a species of grass.

Overview of Achnatherum Diegoense

• This species is native to southern California.
• Here it grows from:
– San Diego
– Ventura Counties
– Channel Islands
– Baja California
• These species are present in chaparral and coastal sage scrub ecosystems.
• These are found below 350 feet in elevation and prominent near streams.
• This grass is a perennial grass.
• It is of a bunching quality.
• The grass can grow up to height of 110 – 140 cms.
• The inflorescence is approximately to a length of 25 centimeters.
• The spikelet is hairy.
• This spikelet is approximately one centimeter in length.
• This is excluding the length of the awn.
• The awn measures approximately 5 cms in length.
• The awn has two distinct kinks.

Scientific Classification for Achnatherum Diegoense

• Kingdom : Plantae
• (unranked) : Angiosperms
• (unranked) : Monocots
• (unranked) : Commelinids
• Order : Poales
• Family : Poaceae
• Genus : Achnatherum
• Species : A. diegoense
• Binomial name : Achnatherum diegoense

Growing/Caring conditions

• It truly is hardy to zone 8.
• It is in flower from May to July.
• The flowers are hermaphrodite (have both male and female organs) and therefore are pollinated by Wind.
• It could fix Nitrogen.

Cultivation Details
• It succeeds in moderately fertile soil with moisture.
• The plant succeeds in full sun.
• The species tolerate temperatures to about -5°c.
• It is only suitable for the milder elements of the United States.
• These plants roots in many cases are surrounded by a rhizo sheath that harbors nitrogen-fixing organisms.
• These organisms probably contribute to the species’ success like a colonizer.
• This plant is suitable for light, medium and heavy soils.
• It prefers well-drained soil.
• The suitable pH for this plant is acid, neutral and basic soils.
• It wouldn’t grow inside shade.
• It prefers moist soil.
• The plant can tolerate strong winds but is not maritime exposure.

• Get results from sowing the seed in a greenhouse.
• Cover the seed.
• It should germinate freely within two weeks.
• Prick your seedlings into individual pots.
• Do so if they’re adequate to manage and plant them in early summer.
• Division should be done in spring.
• Larger divisions might be planted out direct in their permanent positions.
• It’s preferable to pot the smaller divisions.
• Grow them by avoiding shade in a very cold frame.
• Do so before planting them out in late spring or early summer.

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