Does weedkiller lose its effect after time?

Yes, weedkiller can lose its effectiveness over time due to several factors, including degradation of the active ingredients, exposure to sunlight, and environmental conditions such as temperature and humidity. Most herbicides have a shelf life, typically ranging from 1 to 3 years, depending on the formulation and storage conditions. It's essential to check the expiration date and follow storage guidelines to maintain potency. Always refer to the product label for specific information regarding its longevity and effectiveness.