According to NT apostolic teaching, the unregenerate heart, which is "without Holy Spirit does not accept the things that come from the Spirit of God, for he cannot understand them, and they are foolishness to him," (1 Corinthians 2:14) and he wants no part of foolishness.
There is no seeding of an unregenerate heart because it has no Holy Spirit, which is what the parable shows.
Just a question about your statement: there is no seeding of an unregenerate heart because it has no Holy Spirit, if that were true how could anyone every be saved? Think on this statement: the living word of God is the seed which when planting in the heart and mind of the lost is the only way to be converted as a disciple of Christ. They either accept it, sometimes it is a process of time, others just continue to never accept the truths of the word. Is this a true statement or not?
Here is the Berean bible translation on Luke 8:
10And He said, “To you it has been given to know the mysteries of the kingdom of God, but to
the rest,
it is in parables, so that, ‘Seeing, they may not see;
and hearing, they may not understand.’
11 And the parable is this: The seed is the word of God.
12And those along the road are those having heard; then the devil comes and takes away the word from their heart, lest having believed, they should be saved.
13And those upon the rock
are those who receive the word with joy when they hear; and these have no root, who believe for a time, and in time of testing fall away.
14And that having fallen into the thorns, these are those having heard, and moving along are choked under
the cares and riches and pleasures of life, and do not mature.
15And that in the good soil, these are those
who, having heard the word, keep
it in a worthy and good heart and bring forth fruit by perseverance.