Weeds are unlikely to grow through artificial grass when it's installed correctly, as a weed barrier is typically placed underneath the turf during installation. However, in some cases, weeds can appear around the edges or through the drainage holes if there is a buildup of organic material on the surface. To prevent this, ensure that the turf is properly installed with a high-quality weed barrier and that the edges are securely fastened. Regular maintenance, such as removing debris and occasional brushing, can also help prevent weeds from taking root. If any weeds do appear, they can usually be removed easily by hand or with a mild weed killer that is safe for use with artificial turf.