Where does “puutarhakarkulainen” come from?

puutarhakarkulainen (Finnish) comes from Finnish karkulainen, from Finnish -läinen, from Finnish laji, from Old Swedish slagh, from Middle Low German slach, from Old Saxon slag, from Proto-West Germanic slagi, from Swedish slagg — to hit; strike; to hit, strike, throw; to hit,...

puutarhakarkulainen (Finnish): escaped garden plant, garden escape, an invasive plant that escaped from a garden