Jonathan Green Green-Mulch Seed Establishment Mulch. Use Green-Mulch when seeding. Enhances seed germination, contains 1-1-1 slow release fertilizer. Completely weed-free. Instant green, aesthetically pleasing, controls erosion and is safe and biodegradable. A uniform particle size provides even distribution. No reason to rake up like straw. Contains cellulose, corn fiber and a natural tackifier to control erosion. Can be applied with a rotary lawn spreader.