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Raised Garden Beds

Q.Filling A Tall Outdoors Raised Planter

Zone PO19 6DT | bengreen79 added on June 13, 2020 | Answered

Hi, I have built five square raised planters using new softwood railway sleepers. The planters are 60cm deep and open at the bottom, sitting on normal garden soil/mud underneath. We are looking to plant an ornamental tree in the middle of each one (maybe an olive – nice sunny garden?) with some grasses/flowers around the sides. My question is… can i fill the bottom of the beds with something other than soil to save money/aid drainage? and if so, what should i use and how deep would the soil on top need to be? Thank you

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