I don't understand why people say aeration encourages root growth. Air kills roots. They even have special pots with holes on the sides for 'air pruning' roots.
When roots do not get oxygen the root cells will be unable to produce ATP from respiration and will eventually die. Roots use oxygen to absorb and make use of nutrients in the soil. Roots need a source of oxygen in the soil in order to grow. When a root is exposed to air without the protection soil (or other means to keep the root from drying out completely), the roots will eventually die. Also, a root will die if it is growing in waterlogged soil conditions. Dry air is the mechanism of action in air pruning.
If it’s long enough that you would normally cut the grass or longer, yes. It allows you to see the conditions of the grass better. Also produces less ‘fluff’ when you scarify.
I think if you want to remove bumps and hollows with top dressing you need to cut low first. Otherwise I’d leave it a bit longer, especially towards the end of the growing season.
Depends on the season and the weather. As we come into autumn, you can cut lower as the temperatures come down into the teens - most evaporation comes from the soil, not the grass leaves. Also makes it easier to clear leaves with shorter grass
You don't need to put autumn feed & moss killer after using the methods shown in the video. If you do use the mix its counter- productive as you're left with the same results the following year. Scarification removes the moss and dead or pressed in longer bits of grass. Aeration allows water to get through. The moss killer is temporary and doesn't fix the issue but the people in the shop will tell you its great so you keep coming back wasting money on there products
And if you have a bigger lawn and feel its too much work, just buy a leaf rake, one shown in the video while manually scarifying and a pitchfork. Then just do a little bit here and there, you don't have to kill yourself and you'll gradually have the same results over time.
The question was, will applying autumn fertilizer be detrimental to new grass? That is my question too. I want to apply phosphorus to encourage root growth. Will applying autumn fertilizer cause new grass to die?
