Jonathan Green black beauty seed roll is a biodegradable seed mat that is ideal for reseeding bare spots and seeding hilly areas. Unlike other seed mats, ours contains premium Black Beauty ultra grass seed, starter lawn fertilizer, and mulch. Black Beauty ultra grass seed is naturally dark green in color, drought tolerant, and disease resistant. It is consistently ranked as one of the best grass seeds available on the market today. The biodegradable grass seed mat warms the soil below and allows light and water to penetrate so grass seed will sprout. Grows best in sunny or shady areas, and germinates in 10 - 20 days.