The answer to 'why is my stone walkway weeds' is that weeds can easily grow in the cracks and gaps between stones in a walkway. This is a common problem homeowners face, as weeds are opportunistic plants that will take root anywhere they can find soil and moisture. The main causes are improper installation, lack of maintenance, and environmental factors like soil type and moisture levels.
To address this issue, you'll need to remove the existing weeds and then take steps to prevent future weed growth. This may involve re-laying or repairing the stone walkway, applying a weed-blocking barrier, and regularly maintaining the area by hand-pulling weeds or using a selective herbicide. Depending on the extent of the problem, you may be able to handle this as a DIY project, but for more complex or severe weed infestations, it's best to consult a professional landscaping contractor.