Specially blended to support the growth of dry, healthy bulbs and vibrant flowers, the Westland bulb planting and potting mix provide the perfect environment for root growth. It contains added Zinc Complex which helps build and sustain plant immunity to better withstand pest and disease. It also has added grit to keep roots dry and the correct balance of essential nutrients and trace elements to help bulbs thrive. This specialist compost will feed and hydrate plants when they need it and will establish a strong root system for a longer, healthier life.