What is the most common material used as a hydromulch?

• A. Straw
• B. Recycled paper
• C. Plastic
• D. Wood fiber

Answer: (B)

Hydromulch works by including a mulch component in the seed slurry that shields seeds, slows erosion, and helps the mix stay in place as it dries. Recycled paper is the most common option because it disperses evenly with the slurry, creates a uniform protective blanket over the soil, and biodegrades relatively quickly, leaving little residue. Its use also takes advantage of waste paper streams, making it cost-effective and readily available for hydroseeding projects. While other materials like straw or wood fiber are used in some mixes, paper-based mulch is favored for its easy pumping through equipment, good distribution, and timely breakdown. Plastic, on the other hand, would not degrade and can interfere with soil health, so it isn’t used as the mulch component.