What size boulder should you use?
This is may be the most important factor to consider. Here’s the problem: if the rocks you choose are too small, they may be lost once surrounding plant material reaches its mature size, or your rocks may look insignificant compared to other features of the landscape.
And it gets worse – if you choose rocks that are too big, they may dwarf other landscape features or just look out of place.
So how do you determine what size will work best for your landscape? Here’s the solution:
There’s a simple way to “size up” your landscape rock. Before going out to a rock yard to choose your boulders, fill plastic trash bags of various sizes with crumpled newspaper creating “boulders” of the size you think would work into your landscape design. Place these in the areas where you want to use them. This will give you a good idea of how different sizes will look in scale, as well as how many you need and where you want them placed. And they are a lot easier to move around than real boulders! You can shift, roll, tweak and perfect the placement and size before things get “heavy.”