Consider the specific requirements of the plants you want to grow. For example, if you're planting cool-season grasses, laying topsoil in the fall is ideal. Alternatively, if you're planting warm-season grasses or certain vegetables, early spring may be a better option.
A constant, fresh supply of organic matter is necessary to keep it growing healthy. While routinely adding an extra layer of topsoil to your lawn can be helpful, fall is the most opportune time to do so. This is because the winter can be a particularly difficult time for the plant life on your property.
You must top dress in the growing season, NOT in winter. It is usually best to top dress in spring or as soon as you have reached your regular weekly mow. The earlier in the growing season the better. Generally late spring to early summer is best.
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.
Top dressing should be done annually or when you begin to notice common lawn problems like an uneven terrain, which is usually caused by water runoff, repeated freezing and thawing, tunneling critters or simply the settling of the existing topsoil over time.
Loss of Cropland
Fertile topsoil is a precious agricultural resource and some agronomists consider topsoil to be a nonrenewable resource. Once lost, topsoil renewal is extremely slow. In fact, it takes more than 100 years to replace 2.5 cm (1 inch) of topsoil once it is lost.
In general, use potting soil for container gardening, garden soil for planting in flower or vegetable beds (you have to mix it with existing soil), and topsoil for larger projects or if your lawn or garden is in need of greater soil volume (for instance, if there's been soil erosion from strong winds or heavy rains).
Top it off: If the level of soil has dropped, add fresh planting mix also known as potting mix. Ideally, the soil comes to within an inch or so of the rim of the planter or raised bed. Use a fork or hand tool to blend the new soil into the old soil. Blend new soil into the old soil.
Although it's possible for grass to grow through the topsoil, this can only be successful depending on the thickness of topsoil applied as a top dressing. Please note that before applying topsoil over existing grass, you will need to mow the turf first.
Degraded soil makes growing food more difficult and expensive. Without healthy soil, farmers won't be able to grow nutrient-dense food to feed our growing population. The calculated loss in the region is part of a critical issue; some experts suspect that Earth will run out of usable topsoil within 60 years.
On most soils they are best incorporated by cultivation in spring (March and April in most of the UK) just before growth starts. Sandy soils are best manured from late winter. However, autumn application can also work on all but sandy soils.
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.
A rototiller also does a good job of loosening the soil but you still need to level it. If you are adding topsoil, while it may cost a bit more, it is worth it to have the landscaper loosen the soil first, then apply the topsoil, and then have the landscaper return to mix the 2 soils together.
Top dressing is the addition of a thin layer of top soil worked into your lawn, primarily in the early fall, when there are still three to four standard mows remaining before the winter.
Before you begin top dressing, remember: When exactly to start top dressing your lawn (fall for cool season grasses, spring for warm season grasses). To test for soil pH, as pH affects nutrient uptake. If the pH is off, the grass will not be able to effectively absorb nutrients.
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.
Many think that putting topsoil over the seeds would protect it, but in fact, that will actually suffocate the seedlings rather than doing any good. We suggest that straw, hay, or any other type of mulching material be used.
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.
Rich topsoil is as beneficial for new grass as it is for old. Few people realize they can significantly boost the health of their lawn by carefully adding new topsoil. If you simply pile the soil on, you can kill the grass.
Use compost. Whether you make it at home or use a service, compost is a great way to add life back to your soil. As a bonus, it also prevents green waste from going to a landfill, which reduces your waste footprint and prevents the generation of harmful methane gas.
Sometimes starting withfresh potting soil is the best option, but if last year's plants did well, there may be a little life left in that potting soil. With careful attention and a little effort, potting soil can be reused, saving the intrepid grower a few bucks along the way.
Landscape professionals often call topsoil fill dirt – but it's really not actual dirt. Dirt is what you find when you excavate a basement or attic. No plants thrive in dirt. Topsoil, on the other hand, contains natural organic matter from leaves, grasses, weeds and tree bark that can help sustain plant life.
Other than just soil, topsoil is also made up of a mix of rocks, water, contaminants and other organic materials like plant roots, sticks and weeds. In it's raw state like this it isn't very useful, because these rocks, sticks etc will hold back the roots of new plants from sprouting and can restrict water flow.
Any time you stir up soil and water it, you'll get weeds – even if added soil was "clean." Weed seeds are typically throughout topsoil, and it's when they're brought close to the surface and watered that they germinate.
In addition to beautifying your landscape, mulch helps prolong the life of your plants and keep your soil intact. Over time, mulch will break down and effectively become topsoil but it shouldn't be used in lieu of topsoil.