They’re Four Types of Soils
The seeds represent the Gospel, the Sower represents anyone who proclaims it, and the various soils represent people’s response to it.
Wayside / (Roadside) - (hard – birds come and eat it)
Stony - (shallow – no root)
Thorny - (choke out the plants as they grow up together)
Good - (produced abundantly)
The moral of this parable is that not everyone who hears the Christian gospel will understand and / or believe.