This cartoon by Chappatte from the International New York Times shows two stalls in an open-air market. The one on the left is selling homegrown organic produce. The one on the right, which also has a 'Homegrown' banner is manned by a Jihadist recruiter (note the posters and the pile of sheets with a pen and a 'Sign Up' sign).
The cartoonist plays on two meanings of the word homegrown. Homegrown can be used to describe things grown in someone's garden rather than on a large farm. However, homegrown can also mean 'belonging to one's own particular locality or country', and in recent times, the expression homegrown terrorist has come to mean a citizen or resident of a Western country who plots attacks within the country’s borders — a phenomenon sometimes referred to as homegrown terrorism. Although it's not made explicit, the cartoon was probably inspired by the incident in Ottowa on Wednesday when a lone gunman attacked the Parliament and killed an unarmed Canadian soldier. It later transpired that the gunman was a recent convert to Islam whom Canada's security services had identified as a threat, placing a hold on his passport that would keep him from traveling abroad to join conflicts in Syria and Iraq.