Where there is hatred, let me sow love

Where there is hatred, let me sow love. -- St Francis' Prayer

How, exactly, is love planted? 

In a culture as overrun with hatred as an abandoned lot with weeds, how do we make a difference? 

Love is planted by loving. Fig trees grow more fig trees; grape vines grow more grapes which grow more grape vines. "The chicken or the egg?" is meant to be an endless puzzle because each generation must come from the one before it. Love is planted by loving.