Definitely not. Vego is made from Aluzinc coated steel, which has superior Albedo capacity. Albedo is another name for reflectivity, a measurement of how much light that hits a surface is reflected without being absorbed. Research shows that soil in galvanized steel stays at an optimal and more even temperature when compared with wooden, concrete, and dark plastic beds, which soak up summer sun during the day and stay hot into the night. Research also shows that galvanized steel beds have extra benefits of improved fruit set rate, blush color and maturity.
Before Vego released Aluzinc Steel Raised Beds, our friends in Australia have used it in gardening for over 100 years. In fact, it's the most popular raised bed material on the market.