Advice on scrafiers
1. What is scarifying?
A thin felt layer on your lawn is created naturally. It protects the grass against moisture loss and heat. However, if this layer becomes thicker than an inch, it begins to stifle and acidify the lawn. This leads to brown spots and moss. With a scarifier you remove moss and felt, and you cut the roots. This is how to counter the growth of new moss. It's also important to aerate your lawn so moisture, air, and nutrients can penetrate the soil again.
2. Scarifying when?
You can scarify the lawn once or twice a year. The first time should be in the spring, at the end of April or the beginning of May. It has stopped freezing at night and that's important for restoring the soil. You preferably do it on a a slightly humid day, because this is beneficial for the recovery of the soil. If your lawn does not look any better after the summer, scarify again. Do it before it starts freezing at night again.
3. How to scarify?
To stimulate the recovery of your lawn, you should scarify when the grass is slightly damp. Mow the grass first, so the scarifier is easier to get into the soil. Next, scarify both the length and width. This way, you cover every part of your lawn. The blades remove the moss and felt. Conduct the aerating with the knife roller. It pricks holes in the soil, so that moisture, air, and nutrients are absorbed.
4. Sowing, fertilizing and liming
Scarifying can cause bare spots in your lawn. It's a matter of sowing and fertilising grass seeds in order to get the lawn in a good condition again. The liming of your lawn can help. Do so when the soil contains too much acid. A less acidic soil can also be achieved by an increase in sunlight or in the case of a too humid soil, a drainage.
5. The best scarifying machine for you
If you have a small lawn up to 200 m², an electric scarifier with a cutting width of up to 37 cm is a good choice. If your lawn is bigger, a wireless and more powerful machine with a large working width is what you're looking for. There also are lawn scarifying machines with a container that ensures collecting all the moss and decaying neatly together, so you don't have to rake them together afterwards.