Market Farming

["medicinal plant garden" <nan AT olemiss.edu>]

Help.  I am overwintering mature lemon grass plants(cymopogon citratus) in
8,10 & 16 inch pots, in a greenhouse that keep minimum heat at approx. 55
degrees (in N. Mississippi).  A number of my pots are infested with fire
ants (boy, do they hurt when they bite!) We are university program with no
concern for organic methods so I was told to poison the ants.  But my
personal commitment is organic and I am anxious to do this the least toxic
way.  Any suggestions, companies, etc.  If I have a good solution, no one
will insist I use poison!  I am only concerned with keeping the lemon
grass alive (not necessarily encouraging new growth) until we can separate
propagules for field plantings.  Many thanks, nan