We recommend that you use 3 x Stakes per 2.4m length of redcor garden edging 

For general strength requirements a minimum of 1/3 of the edging's profile height is recommended to be in the ground and the stake be approx 2 x (twice) the length of the profile height 

eg if your using 150mm Height profile we would use 300mm or 400mm stakes depending on how hard the ground was 

if you have soft ground we would recommend using angled stakes to keep the edging upright and strong 

You can see by the Galvanised image below the difference in height profiles and stake options - these are all available in Galvanised and Redcor to match the edging you choose 

for more information and more specific information about your particular job as our team in store for more information