Thinning is removing surplus plants.
When you sow in seed
holes, you put in four or five seeds. They grow together.
There are too many
of them and some must be taken out.
Then the plants that are left can grow
As a rule the two best plants in each seed hole are left.
should be done when the plants have a few leaves, but before they are too
In pulling out the surplus plants, the soil is disturbed.
So it must
be pressed down again round the plants that are left.
The first weeding and
thinning are done at the same time.