Oct 13, 2015 - 01:45 PM
As far as Gardens and outdoors, the KM Ant Pro System with Gourmet Liquid Ant Bait is the best all around product / method to control carpenter ants. The reason is that provides 24/7 access to the bait and the bait will last 3-4 months. So basically, you just set this system up, and you only have to check it every 3 months. There is nothing else like this available.
The only other possibility is to use Advance Carpenter Ant Bait, and it will work too. It has to be applied every 3-4 days and the bait supply maintained this way until the Carpenter Ants are dead. How long this takes, is a good guess. Usually 3-4 weeks in most cases.
Liquid sprays will not work for Carpenter Ants outdoors.
Hope this helps.