I just moved to South Jordan and I have clumps of grass pok-a-dotting my lawn. Some say it is crab and others say Johnson. The clumps are hard and raised.



There are several clump grasses that can be "weeds" in lawns.  Tall fescue is a perennial clumping bunch grass with wide blades, dark green shiny leaves and a link to images of tall fescue http://www.invasive.org/search/action.cfm?q=tall%20fescue .  Crab grass is an  annual plant that has a shallow fibrous root system with a seed head with 3 to 4 finger-like spikes.

Johnson grass - here is link to selected images of Johnson grass http://www.invasive.org/browse/subject.cfm?sub=3075

So perhaps from these pictures you can determine what you have in your lawn.  Or you can come by our office with a fresh sample for identification. We will have Master Gardeners on Monday August 25 from 1 pm to 4pm at 2001 South State Rm S1008 hold a plant problem diagnostic clinic to help folks identify their plant problems and provide management recommendations.

Posted on 22 Aug 2008

Maggie Shao
Horticulture Agent, Salt Lake County

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