While most annual weeds are easy to keep under control by hoeing and mulching, perennials tend to be strong and fast-growing, so a little more effort is required to eradicate them. Perennial weeds include wildflowers such as spear thistle, red valerian and celandines, and more ornamental plants like golden rod, curled tansy and some species of grass. You can’t always predict what’s going to be a problem, as some weeds thrive in a particular soil type or situation.
Perennial weeds can be identified and treated accordingly by their root type. Being aware of what you’re dealing with, whether it’s deep tap roots or short, spreading weeds, will help you take effective action.