Are Polystyrene Plant Containers Safe?

Let’s cut to the chase: 78% of urban gardeners use plastic planters, and polystyrene types account for nearly 40% of these. But here’s the million-dollar question – does this lightweight, affordable material come with hidden costs? Polystyrene (often called EPS foam in its expanded form) has been the go-to choice since the 1970s for seedling trays and hydroponic setups. Yet recent studies show something worrying: when soil temperatures hit 30°C (which happens daily in sunny climates), certain chemicals in polystyrene start acting like uninvited guests at your veggie party.