The answer to 'why is my fence weeds' is that weeds can often grow along and around fences due to the ideal conditions they provide. Fences create shaded, sheltered areas that trap moisture and block sunlight, which many weed species thrive in. Additionally, fences can disrupt the natural flow of water and nutrients in the soil, leading to imbalances that favor weed growth.
To address this issue, it's important to regularly maintain the area around your fence by pulling weeds, applying herbicides, and ensuring proper drainage. You may also need to consider re-landscaping the fence line with more weed-resistant plants or materials.