Using the above example, I think it would be a bit ridiculous to purchase 42 bags of mulch, simply for the amount of plastic bags headed to the landfill. In some other situations, buying bags may be cheaper. The only way to find out is to compare the two options. For your own garden, do the calculations both using bags and using bulk and price them out before you spend a single cent on mulch this spring.
When used right, this mulch calculator system keeps you from blowing your entire gardening budget on mulch…. And everyone needs more plants, right?!? For more information on mulching and other garden maintenance tasks, check out the following articles:. Types of landscape mulches Pruning blueberries Organic weed control methods Reasons to skip a fall clean up. Do you use a mulch calculator at the start of each season?
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Skip to primary navigation Skip to main content Skip to primary sidebar. Step 1: Decide on the type of mulch to use There are many different types of landscape mulch, from shredded bark and pine chips to compost and pine straw. There are many different types of mulch for planting beds, including pine bark nuggets and arborist wood chips. Step 2: Determine the square footage of the garden area. To calculate the square footage of a square or rectangular garden area, multiply its height in feet times its width in feet.
Next, you need to decide how deep you want to layer the mulch. Two or three inches is typically an effective depth for most vegetable gardens or flower beds. Now take the square footage of your bed and multiply by your desired depth. Using the example above and assuming a 3-inch depth 0.
Divide this in half to get the radius of your bed. Now, take the radius and square it, or multiply it by itself. Then, multiply this figure by pi, or 3.
To calculate how many L litre bags you might need, multiply your area in square feet by the depth of mulch required also in feet to get the number of cubic feet you require. Next, convert the figure to litres by multiplying by Finally, divide your figure by to work out the number of L bags required. To help you with your calculations, here's a quick chart of coverage for standard US mulch bag sizes for mulch depth of inches. We'll then cover the process of measuring and calculating how much mulch you might need in more detail.
Here's an in-depth guide on how to measure and calculate. US gardeners are safest with feet, whilst British gardeners should probably work in metres or centimetres, but just pick one and stick to it.
Measure the length and width of the area for mulching. If you want to get the precise area of your circle, though, use our square footage calculator here. You also need to think about depth. If the mulch is going to be mainly decorative, then 2 inches is fine. To work out the volume of mulch you need, just multiply the three measurements together.
Alternatively, you can use our cubic yards calculator or cubic feet calculator. In the US, you might buy mulch by the cubic foot. If you followed the steps above using feet, then you already have the quantity worked out. In the UK, mulch is usually sold in litres.
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