What are the effects of prolonged exposure to ozone on PVC outdoor flower boxes?

Prolonged exposure to ozone can significantly impact PVC outdoor flower boxes, causing visible and structural damage over time. Ozone, a reactive gas, accelerates the oxidation process in PVC materials, leading to surface discoloration (often yellowing or whitening) and loss of gloss. The plastic becomes increasingly brittle, reducing impact resistance and making the boxes prone to cracking, especially in cold weather. UV radiation often accompanies ozone exposure, compounding the degradation. The material's flexibility decreases by up to 40% after extended ozone contact, according to plastic weathering studies. To mitigate these effects, consider applying UV-resistant coatings or choosing ozone-stabilized PVC formulations for longer-lasting outdoor flower containers. Regular cleaning and protective storage during harsh weather can also extend product life.