grass and fescue rhizomes - Knowledgebase Question

Seattle, WA
Avatar for cougar_villa
Question by cougar_villa
August 30, 2006
I have Kentucky blue grass and tall fescue in my lawn. How deep are the rhizomes? I want to place some bricks to separate between my lawn and my flower bed. If some creeping rhizomes manage to go underneath the bricks, how far do the blocked rhizomes go horizontally before they stop? Any suggestions about the size of the bricks.

Answer from NGA
August 30, 2006
How deep the grass roots will grow depends upon your soil type and how often the grass is watered. You might want to place 4-5" of barrier between the lawn and flower bed (there are plastic and metal barriers on the market) and then top the barrier with decorative bricks. Standard sized bricks can be laid end to end or even buried half-way into the ground (longways) so you have only 3-4" above ground.

Best wishes with your landscape!

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