Ants in greenhouse

[Jayell]

My greenhouse base is flagstoned and there generally tends to be a handful of ants scurrying about on/between the flags most days

Weather here today has been a mixture of thunderstorms and warm, muggy spells.......went into greenhouse late afternoon and there were hundreds of ants and a lot of flying ants on the base and the inside of the glass

I guess I have an ants nest underneath the flags but it's not really practical at the moment to be lifting flags to find the nest as my greenhouse is fully populated with grow bags full of tomatoes and cucumbers

Have put ant powder in between the flags, will this get rid of them?

[follyfancier]

a mixture of icing sugar and borax will kill them off very quickly,just sprinkle it in the cracks,but don,t get it on your edible plants and don,t forget to wash your hands afterwards

[eddiek]

kettle of boiling water poured between the flags.Not a very nice death but its instant

[rowanwitch]

jeyes ant bait little plastic things filllled with some sort of poison they work pretty well and don't contaminate the things around them

[johnk]

Why are the ants a problem?