I plan to build a raised garden bed for vegies at about hip height for my mum to reduce bending. So it will be about 1.2 meters tall however I am just wondering how deep the soil should be and what to use.
I mean, I obviously don't want to have the dirt 1.2m down therefore how deep should I make it. About 30-40cm? Is that right?
And what should I use for the base. Just wood or a plastic tub/pond?
What about drainage?
Or should I just have dirt 1.2m down? With a wood frame and weed mat on the inner sides. Though the pressure when watered may be too much?
Any assistance would be helpful!