The seeds are the word of God (Mk 4:14-4:14)

“The sower

Sows

The word.”

 

ὁ σπείρων τὸν λόγον σπείρει.

 

Mark said the seeds were the word (ὁ σπείρων τὸν λόγον), without any further clarification.  Matthew, chapter 13:19 was more explicit with the seeds as the word of the kingdom (τὸν λόγον τῆς βασιλείας).  Luke, chapter 8:11, was ever more specific when he explicitly said that seed was the word of God (τὸν λόγον τοῦ Θεοῦ).  Mark said that the sower (ὁ σπείρων), either Jesus or his apostles, was sowing the word (τὸν λόγον σπείρει), the word of the kingdom, or the word of God into good ground, so that it might bear fruit.

Jesus explains the sower (Mt 13:37-13:37)

“Jesus answered.

‘The one who sows

The good seed

Is the Son of Man.’”

 

ὁ δὲ ἀποκριθεὶς εἶπεν Ὁ σπείρων τὸ καλὸν σπέρμα ἐστὶν ὁ Υἱὸς τοῦ ἀνθρώπου·

 

Only Matthew has this explanation about the parable of the weeds that was earlier in this chapter, 13:24-30.  Jesus answered his disciples (ὁ δὲ ἀποκριθεὶς εἶπεν), via Matthew.  The sower of the good seeds was the Son of Man (Ὁ σπείρων τὸ καλὸν σπέρμα ἐστὶν ὁ Υἱὸς τοῦ ἀνθρώπου), plain and simple.  In other words, Jesus, the Son of Man, is the great householder who sows only good seeds, the word of the kingdom of heaven.