This isn't the case with the seeds of the kingdom of God. Look at this verse:
Jesus said, "What is the kingdom of God like, and to what shall I compare it? It is like a mustard seed, which a man took and threw into his own garden; and it grew and became a tree; and the birds of the air nested in its branches."
The seed sower just threw the seed into his garden and very likely forgot about it.
But that kingdom seed sprouted and grew into a tree! A tiny seemingly insignificant seed planted on the run became a tree!
This gives me comfort for sometimes my kingdom seed plantiing seems haphazard and not effective or whatnot -- but God takes any seed we plant and does something with it.