Bible Verses About Seed: Preaching the gospel

And he spoke to them many things in parables, saying: Behold the sower went forth to sow.

Which is the least indeed of all seeds; but when it is grown up, it is greater than all herbs, and becometh a tree, so that the birds of the air come, and dwell in the branches thereof.

If we have sown unto you spiritual things, is it a great matter if we reap your carnal things?