CULT: boron toxicity - ant bait question...

This is another off the wall question - I've had huge infestations of ants this year in potting soil, between pots in stacks of empty pots, in pots containing plants.
Much as I hate to do it, I finally got tired of being swarmed by ants every time I tried to work in the irises - last straw was when my main supply of potting soil became the center of ant civilization here.
So I put several of the outdoor Terro boric acid ant bait stations out and that seems to have made enough of a dent in the populations that I can finish fall potting.
My question is this - I assume that the boron from the bait is now mixed in with the itty bitty dead ants and larvae in the potting soil. 

Anybody have a clue whether that's enough boron to be toxic to plants?
I rummaged around on the web but couldn't find any relevant info. Maybe not creative enough with key words. 
--
Linda Mann east Tennessee USA zone 7/8
East Tennessee Iris Society <http://www.DiscoverET.org/etis>
Region 7, Kentucky-Tennessee <http://www.aisregion7.org>
American Iris Society web site <http://www.irises.org>
talk archives: <http://www.hort.net/lists/iris-talk/>
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