sower
noun
sow·er ˈsō(-ə)r 
plural sowers
: someone or something that sows: such as
a
: a person who plants seed
A sower looking forward to seed catalogues might be glad this Christmas to be given a dibble. 
The New Yorker
The New Yorker b
: a machine or tool for planting seed
… fuel costs for agricultural machinery such as tractors and sowers and harvesters … Jared Diamond
Jared DiamondFinally, with the dark moon in place, the fields cut and fertilizer spread, our son Clark and I used a hand-crank seed sower to spread the seed mixture … Philip Case
Philip Case c
: a person or thing that promotes the spread of something (such as fear or doubt)
Readers of Dante will recall that, in the Inferno, a special slice of hell is reserved for the sowers of discord—schismatics who tried to advance themselves by dividing institutions. James Poulos
James PoulosIt's good to know this particular Saturday Night Live sketch was cut for time and not vetoed, because Will Ferrell playing a sower of chaos in the form of a high school drama teacher is pure magic. Nick Romano
Nick Romano
Word History
Etymology
Middle English sower, sawere, from Old English sāwere, from sāwan "to sow entry 2" + -ere -er entry 2
First Known Use
before the 12th century, in the meaning defined above