If our turn from sin and remission of same is an actual event, there is no symbolism.
If the word of God is planted in us (heart) it can bear fruit if the ground of our heart is good. That is an event.
If seed are planted in a good ground situation, they will grow a plant that can bear fruit.
That is an event.
Jesus explained the parallel (of the sower) to the disciples in private.
Romans 1:20 kjv
20. For the invisible things of him from the creation of the world are clearly seen, being understood by the things that are made,
even his eternal power and Godhead; so that they are without excuse:
21. Because that, when they knew God, they glorified
him not as God, neither were thankful; but became vain in their imaginations, and their foolish heart was darkened.
Two events. Two events paralleled. Two events explained together in Matthew13, Mark4, Luke 8.
Creation tells the whole story, but it is hidden in symbolism. Romans 1:21 says the hidden was denied (if you think about it). The explanation of the parable of the sower is a call to think. It is a call to compare creation with ultimate spiritual reality.
I could not understand these thoughts for years and years. I do not judge those who do not see this.
Walking through the agriculture museum in Jackson Mississippi helped some. The bovine 4 stomachs helped me see the stages of digestion. Our thinking process goes through stages of understanding. If we deny creation reality we become darkened in our understanding. I am probably the chief offender.
This is intended to help, but it can be seen in other ways.
Mississippi redneck
eddif