153.5 yd² * 0.6 yd = 92.1 yd³. What is the top-selling raised bed soil product? Calculating Depth. Find a level area for the raised bed or one where minor modifications will make it level. Add the following items in the estimated quantities below. We have a Soil Calculator link on the Harrod Horticultural website that works out the quantity of soil you will need but I have done this for you - you will need 1500 litres of compost for the 3 beds in total. Calculate Soil Requirements. Calculating how much soil you need for a raised bed planter box is relatively easy--as long as your eyes don't roll when you are asked to do a bit of math. 2 Divide any of the dimensions you measured in inches by 12 to convert them to feet. x Width. Hi DaNelle – We have tall raised beds that we originally filled with half regular soil and half ‘organic garden soil’ that we got from a reputable place. 1) enter dimensions of planting area, 2) enter desired depth, then 3) click the “Calculate how much I need” button. Compost soil near you, low delivery fee. Raised Bed Soil Recipe. Our Garden Mix is optimized for filling – or revitalizing – elevated raised beds and containers, with lots of nutrients and beneficial microbes for growing lush, healthy vegetables & flowers. 14 Comments. Soil for raised planting beds comes pre-mixed with the right blend of soil, soil conditioners and nutrients for optimal outdoor growing of herbs, flowers, fruits and vegetables. I want to ensure equal coverage of soil to a depth of 6 inches. Raised garden beds – Our Doc’s Garden Bed Kit comes with all the Soil 3 needed to fill your bed; If you have your own raised garden bed, use our Soil 3 Calculator to find out how much you need based on the depth; Spread over the entire bed and mix/till into the existing soil. Different plants can require different soil pH levels. This is just your foundation mix. In my example (shown below), I am calculating a 4’x4′ (or 48″x48″) raised bed that is 6″ deep. If the area has turf, remove the top layer of grass or place recycled cardboard or multiple layers of black and white newspaper on top to suppress the existing grass or weeds. If you are not sure how high to make your raised bed, consider what you want to grow. Depth is measured in meters(m). The amount of soil you need to purchase to fill your raised bed garden depends on the size and depth of your bed. To calculate volume in rectangular raised beds enter the dimensions of your bed below: Length. Tired of mixing? By far, the easiest way to calculate quantities is to use the soil calculator above! A blend of compost, sand, silt, and peat moss. How many soil bags do I need for a raised bed? Height (m) x width (m) x length (m) = cu m of soil. The last thing to do is to assess the estimated weight of the required soil and its cost. Next, determine the size and height of the raised bed. Just add some soil revitalizer before planting for the growing season. For instance, a raised bed that is 6 feet by 6 feet has a square footage of 36 feet (6 x 6 = 36). These mixes facilitate the right amount of drainage, and some even help with pest and weed control. Calculation Formulas Square or Rectangle (Length x Width x Depth) The area of a square or rectangular garden is easy to calculate. As you can see in the picture above, for my 4’x4′ bed that is 6″ deep, I will need 8 cubic feet of soil. To calculate a square yard, multiply the area by 9. Area a: L x W x D ÷ 27 = Cubic Yards. 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