This happens quite often in Seville, but I’ve heard of it happening outside of cathedrals across the country of Spain. Usually older women will be standing outside the cathedral, seeking to capitalise on people’s good nature by pretending to bless you or convince you that the herbs they are holding have some healing properties.
What they really want you to do is take the rosemary so they can take your money. The frustrating part of this is that they can be very aggressive, similar to the bracelet scam that takes place in big European capital cities, they will try and force the rosemary upon you. When you take it in your hands so it doesn’t fall on the floor, they will chase you down until you pay them.
Do not approach or make eye contact with these ladies, try to avoid them if possible.