I posted before about eco-friendly ways to deal with ants in the garden. Today I dug up the small box of potatoes I was growing (harvest small but hopefully tasty!), to discover an ants' nest, or at least a lot of ant eggs, in the bottom of the box.
This was especially irritating as I'd seen fewer ants around of late, and was hopeful that the cinnamon was doing the trick.
On this occasion, I did decide to try the boiling water, primarily aimed at getting rid of the eggs. As the potatoes were out of the box, it wasn't going to destroy any plants; and despite my reluctance to kill them, I am really not up for hosting an ants' nest on my 5m x 1.5m balcony.
After the boiling water (a kettle-full over the couple of buckets that the compost had been transferred into), I chucked a watering-can full of cold tap water in as well, in the hope of drowning or scaring away any remaining ants. Or at least convincing them to take their nest elsewhere.
Watch this space for results... [sigh] Unfortunately I think it's going to be hard to get rid of them altogether, since I have a lot of plant-pots that I'm loathe to dig out altogether; so there's always somewhere else for them to go.