Underlay Fertiliser and Water Crystals 4 kg Covers 160 m2 Helps bed in new lawns in 5 brilliant ways. All-in-one mix of slow release nutrients and water crystals to power new growth. Helps new lawns thrive. Establish new lawns faster than ever before. Includes beneficial microbes to build healthier soil. Helps new roots get the water they need. Proven safe for ALL turf types including Zoysia, Buffalo and Couch. Australian made and owned.