For the recent eruption prevailing winds were from the north, and the volcano is on the south coast. So most of the effects were blown out to sea. But farms in the vicinity of the volcano certainly felt it:
The larger eruption in 1783 killed over half of livestock, and a quarter of the human population in the ensuing famine: https://en.wikipedia.org/wiki/Laki
https://www.nasa.gov/topics/earth/features/iceland-volcano-p... (see e.g. the photos from 5.11.10)
http://lisa.lbhi.is/lisalib/getfile.aspx?itemid=2747
https://www.vegagerdin.is/Vefur2.nsf/Files/Ahrif_eldgossins_...
The larger eruption in 1783 killed over half of livestock, and a quarter of the human population in the ensuing famine: https://en.wikipedia.org/wiki/Laki