Kadoosje wrote:

I have quite some land which I want to turn into a nice wood for the
community children to play in.

I was wondering (to figure out how much it would cost me) how many trees per
square kilometre or per square ha I have to plant?

In the temperate climates of the USA the general advice with conifers
(pine, fir, spruce, larch) is to plant them 8' apart then plan on
thinning them to 16' apart when they fill in, usually after 20 years. I
did this with 3 acres and it has worked beautifully. They are not 40
years old. I used eastern white pine, norway spruce and european larch.
You wouldn't want spruce where children play since it has a stiff sharp
needle. Also, larch is a deciduous conifer but is absolutely beautiful
in the spring when the new needles come out. It also has fall color
when the old needles turn color. I would imagine that Belgium has
similar species of trees that do well.

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