Boost your native plants' growth with Martins Native Planting Mix! Our specially formulated mix is perfect for growing low phosphorus tolerant plants in either pots or directly in the ground. With its free draining properties and controlled release fertilizer, this mix will give your plants the nutrients they need for up to 9 months of growth. For best results, add a low phosphorus or native fertilizer towards the end of this period. Only the best for your natives!