Question
I have a 3 year old brick paver patio and last summer I had a great deal of moss growth between the bricks.  I tried using a vegetation killer which did not work.  I resorted to using a screwdriver between the bricks to remove the moss but it returned in a few weeks. Do you have any suggestions?  I do not want to damage the brick since it is beautiful patio.  I live in the Chicago area.  Any help would be appreciated.  Thanks in advance.

Answer
Mike - there are two approaches listed below.  The first is more "environmentally friendly", and listed by increasingly harsh levels.  The goal is to create a hostile environment so this envasive plant lets go of it's grip on your brickwork:

Approach # 1 ?Pressure-wash with lime, vinegar, or laundry powder/chlorine mix:

http://members.tripod.com/mossbusters/

A wide-spectrum herbicide didn't work before, because it is designed to kill a wide range of plant materials.  What you need is a "silver bullet" type of product.

Approach # 2 ?Use a specialty MOSS herbicide (I've listed one, and there are others out there):

http://www.lillymiller.com/moss_out.html

Neither of these methods will damage the brickwork.

Good luck! -Marc