Founded in 2008. The Landscape Juice Network (LJN) is the largest and fastest growing professional landscaping and horticultural association in the United Kingdom.
LJN's professional business forum is unrivalled and open to anyone within within the UK landscape industry
LJN's Business Objectives Group (BOG) is for any Pro serious about building their business.
For the researching visitor there's a wealth of landscaping ideas, garden design ideas, lawn advice tips and advice about garden maintenance.
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350 standard blocks equate to 7 sq m. Bed of say 75mm = 0.525cu m. With say 30% added on for additional trench width and cement mix slump = 0.75cu m. A one ton bag could be tight, but will depend on the depth of bed of course.
you need to use grit sand or a sharp sand, building sand is for laying bricks