So I'm not 100% sure if this is the deeper symbolic meaning you'd be looking for, but hopefully this will be helpful to see the story in a greater light.
What I've learned from looking into parables is that nothing should be overlooked, that every word has a greater meaning behind it. Interestingly I've found deeper meaning behind this by looking into farming itself. Jesus of course was speaking to many people who were farmers themselves, so he spoke in a way that They would understand.
From what I've found the Parable itself is linear, one event connects to the other. The Sower here and His seeds simple enough is representative of Jesus (also those He spreads The Gospel through) and The Message itself.
The Very First place The Sower Sows His seeds is Besides The Road. The Word Road here G3598's Metaphorical meaning is "a way of thinking, feeling, deciding" the Understanding is That The Sower Sowed their Seed into The Mind of Man, (A New Way of Thinking) you've probably seen before that G3056 Logos (In Respect To The Mind) has all these same attributes stated. And of course I'm sure you're familiar with The Renewing of The Mind.
But when The Sower Sowed their Seed into The Mind of fallen Man, The Birds Came and Ate them up. What exactly are The Birds? Also what happened to the seeds after the Birds ate them, more on that later.
Now in order to understand what Birds represent when God speaks of them we have to turn to The Old Testament and The Hebrew Pictograph writing system.
We come across this mystery many times in The Old and New Testament these "Birds of The Air" "Beast of The Field" and "Creeping Things" when looking at each word to my Surprise each letter represented a Part of The Human Body.
When speaking of Birds H5775 the letters are made up of Ayin, Vav and Pey. Ayin on The Hebrew Pictograph is Eye, Vav is used for the Word And, while Pey is Mouth. That would be Eyes and Mouth. I thought at first maybe just a coincidence, but when looking at the next word the same thing was found. H2416 is made of the letters Het and Yodh, when looking at The Picture fo Het it is a Body/Torso while Yodh is an Arm. So far we have Eyes, Mouth, Arms and Torso. At this point I figured if the last one does the same thing it must be referring to The Human Body. H7430 made of Resh, Mem and Shin. Resh is a Head of a Man, (also connected to Ears) Mem is Water, and Shin is Teeth.
So with The understanding that Birds represent Eyes and Mouth we now have an understanding of what Ate up The Seeds, The Eyes and Mouth of Fallen Man. Of course I'm sure you can think of many verses that explain Man's eyes and mouth causing corruption and destruction.
The next place the seeds land are on The Rocky Places. The Root word that Rocky Places connect to is G4074 which is Peter, (in the sense of Simon Peter) this part of the story speaks for itself, The Rocky Places are those who are Firm in Their Beliefs and show much promise at the beginning, but When The Sun rises (The Sun Rising is representative of Jesus being lifted up) being that The Lord God is a Sun in Psalms 84:11 (lifted being Him put on The Cross) they were scorched due to them having no Root (Rooted in God through The Holy Spirit)
Others fell among The Thorns which choked them out. but where in the world did these Thorns come from? remember the Birds that ate the seeds from earlier, well this is where knowing about farming came in handy.
When A Sower Sows seeds and a Bird comes and eats the seeds, the bird then digest the seeds and expels the waste onto the ground. remnants of the now corrupted seed still exist within the waste of The Bird which then goes into the ground and from there Thorns/Weeds sprout up.
The idea here is that Fallen Men who take in the Gospel then Corrupt it with their eyes and mouth, which is than used to choke out those who hear about it. "Come on you really think some Guy Rose from the dead 2000 years ago?" "What God couldn't think of a better way to save us from Sins then sending His son to be tortured?!?" I'm sure you've heard plenty of examples like this yourself.
Lastly others fell on Good Soil and yielded a crop, some a hundredfold, some sixty, and some thirty. Now clearly there is no Man who understands The Gospel/Word and bears fruit, we know from Scripture that there is No Good Man/Soil not Even One, Only God is Good. "THERE IS NONE WHO UNDERSTANDS THERE IS NONE WHO SEEKS FOR GOD" Rom 3:11 So what is Jesus talking about here in His explanation of The Parable? He clearly says "this is the man who hears the word and understands it" So Who is This Man Who can do what No other Man can in His fallen Nature?
Are Answer is in Isaiah 52:13-15 "Behold, My servant will prosper, He will be high and lifted up and greatly exalted. As many were astonished at you, his appearance was so marred, beyond human semblance, and his form beyond that of the children of mankind. Thus He will sprinkle many nations, Kings will shut their mouths on account of Him; For what had not been told them they will see, And what they had not heard they will Understand."
The Body of Christ is The Man who understands The Word, because He Is The Word. He is The Good Soil that The Seed Lands On, He is The Kingdom Of Heaven that is Like a Mustard seed that has grown larger than all the garden plants and becomes a tree, so that the birds of the air come and make nests in its branches.” (The Eyes and Mouth of Men make their New home in The Kingdom of Heaven)
“It will come about in that day,” declares the Lord, “That you will call Me Ishi And will no longer call Me Baali. “For I will remove the names of the Baals from her mouth, So that they will be mentioned by their names no more. “In that day I will also make a covenant for them With the beasts of the field, The birds of the sky And the creeping things of the ground. And I will abolish the bow, the sword and war from the land, And will make them lie down in safety." Hosea 2:16-18
And from Him through His Death the crop yields. "Truly, truly, I say to you, unless a grain of wheat falls into the earth and dies, it remains alone; but if it dies, it bears much fruit" John 12:24