Inch by inch, row by row
Gonna make this garden grow
All it takes is a rake and a hoe
And a piece of fertile ground

That's the way a wonderful children's song by David Mallet starts.  It's entitled "Garden Song" and continues this way:

Inch by inch, row by row
Someone bless these seeds I sow
Someone warm them from below
'Till the rain comes tumbling down.

Grain for grain, sun and rain,
Find my way in nature's chain
Tune my body and my brain,
To the music from the land.

Plant your rows straight and long,
Temper them with a prayer and song.
Mother Earth will make you strong
If you give her love and care.

Those words from the chorus which say, "Inch by inch, row by row, Gonna make this garden grow." remind me of our text for today.  Jesus made clear that the Kingdom of God grows the same way.   He says, "The kingdom of God is as if someone would scatter seed on the ground, and would sleep and rise night and day, and the seed would sprout and grow, he does not know how.  The earth produces of itself, first the stalk, then the head, then the full grain in the head."