A greenhouse without plastic UV protection quickly becomes a short-term structure. The plastic cover weakens, cracks, and loses its clarity, which reduces light transmission to crops. This forces growers to replace covers more often, increasing costs and labor. More importantly, unprotected plastics allow harmful radiation to penetrate, stressing plants and sometimes encouraging the growth of pests or fungi that thrive under unstable light conditions. With proper plastic UV protection, growers enjoy a stable, filtered light source, healthier crops, and covers that stand up to wind, rain, and sun. In regions like Long Beach, California, where coastal sunlight mixes with humid conditions, UV-protected plastic is the difference between a struggling greenhouse and a thriving one.