Westland Ericaceous Planting & Potting Mix has been specially blended with added zinc complex that naturally supports plant health for an abundance of stronger, healthier acid-loving plants such as rhododendrons, azaleas and camellias.Key Features:This mix is infused with nutrients that release slowly over six months, providing a steady supply of essential nourishment for sustained growth.The inclusion of slow-release iron helps maintain an optimal acidic environment around the roots, vital for the well-being of acidophilic species.Enhanced with ingredients that boost chlorophyll production, this mix promises greener, glossier foliage, enhancing the aesthetic appeal of your plants.The added zinc complex plays a critical role in building plant resilience, enabling your garden to thrive by increasing its ability to withstand various stresses.