On Apr 21, 6:30*pm, Zz Yzx wrote:
Plastic lanscape edging and stakes.

Or even redwood bender baord and stakes.

-Zz

As per ZZ's comment

Plastic landscape edging (available from amazon & elsewhere) ~$10
for 20ft roll.... 6" high

Nail / staple to edge of a Trex or wood 1x4. Make some 5' sections.

cheers
Bob