If you are planning gardening or a landscaping project, it is essential to understand the difference between topsoil and lawn soil. Topsoil is a general term for any soil used as a loose, upper layer of soil in a garden bed, whereas lawn soil is often made of specially blended nutrients optimized for grass growth.
Topsoil Uses Can Include Fixing Uneven and Patchy Lawns
You may even notice areas of your yard that are slightly uneven. Topsoil is a great remedy for both problems. To grow grass, simply spread topsoil across the area so it is 1 inch deep. Evenly distribute grass seeds and till the soil to combine.
But why shouldn't you use it by itself as a growing medium? Due to its poor soil structure, topsoil isn't a good medium for plant roots or even flower beds.
Loam soil holds moisture but also drains well when you water the lawn. It is able to retain nutrients and allow air flow, making it the most ideal soil for plants. Sand is the largest soil particle. Sandy soil drains well, is quick to warm up in spring and easy to cultivate.
Adding soil over grass can be another effective form of repairing a lawn. It is possible to dump new soil over top of what you have, and prepare it for sod or seed. This option will save you money on excavation costs of removing the old soil and grass.
Again, remember to mow the lawn the day prior to applying the top dressing; the longer the grass the more sandy loam or clean river sand required to cover the area and a deeper layer of soil will make it harder for the grass to grow through it.
Usually, 8 inches of topsoil is needed to fill a new garden bed or raised bed. If you intend to add topsoil to your lawn, you will need approximately 4-6 inches of topsoil to give you the healthy lawn you desire.
Recommended depths for topsoil • General gardening: for most planting, such as for a herbaceous border, you'll need around 8 inches (200mm) of topsoil. Lawns: four to six inches (100mm-150mm) of topsoil is required to let the roots of a newly laid lawn establish themselves.
Shovel out a small amount of your material, working in small areas, a few square feet at a time. Using your shovel, “fling” the materials with a smooth, sweeping motion similar to hitting a hockey puck, spreading the topdressing over the lawn to a depth of ⅛ to ½ inch.
Soil Depth is Crucial
Topsoil is typically thought of as the top 6 inches of soil. We recommend adding at least 2 to 3+ inches of topsoil and rototilling it 2 to 3+ inches into the existing dirt to get the recommended 6 inches depth.
Topsoil Myth 4: Rich Soil Never Needs Fertilizer
Those nutrients usually need to be replenished every so often for the healthiest growth, no matter which type of soil you have. This is especially true for the soil where you grow annual flowers and vegetables, which suck up a lot of nutrients to fuel their rapid growth.
Topsoil is dense with minerals and organic matter, which gives it a much darker color than other gardening soils. Some might argue that topsoil is the most valuable soil layer in your garden. Garden soil is used as an additive to replenish the nutrients and organic materials in your garden.
It's best to use it wherever you're lacking soil, for example, to fill in a low spot in your lawn, or as a base layer in a new garden that's missing a foundation of soil. If you use topsoil in a garden, you'd still have to add additional compost or manure to help your plants thrive.
Will grass seed germinate on top of the soil? Yes; in fact, germination will suffer if too much soil is placed on top of the seeds. The experts at Jonathan Green recommend placing a thin layer of mulch or topsoil over them to help keep them moist and warm and promote growth.
Poor soil that is hard and compacted is often the problem when it comes to growing a great lawn. When soil is too alkaline and compacted, air, water and nutrients cannot get down to the roots, and the grass will not grow properly. Lawns thrive in slightly acidic to neutral soil with pH levels between 6.2 and 7.0.
Reinvigorate Your Lawn
By spreading grass seed over your existing lawn, you can thicken up the thin areas, and your lawn will start to look terrific again.
To start off you will need to clear the existing area before laying down your new soil. Then lightly turn over approximately the top 5 inches of the existing soil, this will loosen the ground and help make sure you get the best from your new topsoil.
The average topsoil cost is between $10 and $50 per cubic yard, or $150 and $500 per truckload, including delivery.
Length in feet x Width in feet x Depth in feet (inches divided by 12). Take the total and divide by 27 (the amount of cubic feet in a yard). The final figure will be the estimated amount of cubic yards required.
As a general rule, 4 inches of topsoil is usually adequate. However, you may want to add more if the area has a lot of clay, or the area is rocky. You may want to put down sand or gravel if the drainage is poor.
On an average, it takes about 100 years to produce ONE INCH of topsoil; like any other resource soils must be managed, protected, conserved, and maintained if they are to continue feeding the ever hungry peoples of the world.
It can take 500 to 1,000 years for one inch of topsoil (the upper layer of soil containing the most organic matter and microorganisms) to form through the interaction of bedrock, climate, topography, and living organisms.
Most types of grass can grow through 2 inches of topsoil placed on top of it if the existing established plants are healthy. Grass often grows through topsoil when a thinner layer of topsoil is placed on top of an old lawn.