Just when you think you’ve had everything dealt to you and just when you think you’ve dealt with it all; just when you think there couldn’t possibly be another plant disease or chomping insect or marauding animal that you haven’t seen; just when you think that maybe, just maybe, you’ve got a few things figured out and maybe, just maybe, you have everything under control; well, that’s when Mother Nature serves you up something new and unexpected.

I’m exaggerating a bit, of course, and we have had a successful and relatively uneventful year in the garden.  But after morning inspection and a nice swim, I looked over to the east planter and saw a pile of what looked like sawdust at one corner, clear evidence of carpenter ants.  These guys aren’t after our vegetables or even the leaves or soil.  No, it is the planter itself that they are eating.  Well, strictly speaking they don’t eat the wood but they do tunnel through it.  If left unchecked, the ants’ nesting will weaken the boards, accelerate their natural decay and eventually lead to their crumbling (structural engineers these ants are not).

When carpenter ants appear around the house, I sprinkle a few teaspoons of poison in their path which, if I am lucky, they take back to the nest and share with their siblings.  With further luck (and so far, so good), the colony dies.  This is one of the few occasions where I will resort to nasty chemicals—potentially, the integrity of the house depends on it.  I have never needed much nor needed it very often and our accumulated exposure has been relatively low.

Unfortunately, I can’t use any poison in the planter.  Granted, the carpenter ant infestation appears to be well below the vegetables (at the bottom of the planter) but it is very possible that the plants’ roots have extended that deeply.  Even if not, I do not want any dangerous chemicals that close to our food.  After all, I chose to use untreated lumber to build the planters; using a chemical pesticide would not be consistent with that philosophy.

So, what to do?  It’s not like I can ask them to leave.

On the other hand, maybe I can give them a reason to leave.

I brought the hose over to the nest’s entrance and set the sprayer to “jet”.  Then I placed the nozzle directly against the side of the planter—point blank range—and turned the water on full.  Any tunnels, caverns or shafts that the ants had created should have been instantly flooded, and possibly collapsed.  At least, I certainly hope so.

Problem solved?  We shall see.