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n layer of soil over most of the seeds. Then you spread the straw over top of the soil. The pieces of straw are scattered in all directions, with many of them crisscrossing each other.

Remember the movie, “Honey I shrunk the Kids”? The part where they are walking through the lawn and the blades of grass are huge compared to them? This is what it’s like to be a grass seed under a mulch of straw. Those little tiny grass seeds are lost under the straw, and that's exactly what you want to protect them from the intense rays of the sun.

As the sun works its way across the sky the grass seeds actually receive filtered sunlight. Enough sun to warm the seeds so they grow, but also enough shade to protect the tender young grass plants. As the grass plants grow, they also raise the mulch with them to a degree, providing additional shade for the seeds that haven’t germinated yet. The shade that straw mulch provides also helps to retain the moisture around the seeds. Grass seeds will never get this kind of protection from hydro mulch.

Another trait of hydro-seed is that as the slurry dries, it becomes a blanket over the lawn. In the event of a heavy rainfall, running water tends to get under this blanket and carry it away, leaving big areas with no seed at all. They make a glue that you can actually add to the hydro seed mix, but my experience has shown that the glue will hold the hydro seed in place a little longer, but when it does wash out much larger areas wash because they are glued together.

With hand seeding, each seed is independent, and they fall between the nicks and crannies of the soil. In the event of heavy rain, the running water must be severe enough to wash the soil away before the seeds can be moved. I’ve installed hundreds of lawns using both techniques, for the difference in cost I’ll take the hand seeded lawn any day.

Michael J. McGroarty is the author of this article. Visit his most interesting website, http://www.freeplants.com and sign up for his excellent gardening newsletter. Article provided by, http://gardening-articles.com. If you use this article the above two links must be active.