Hi.

I'm a frustrated gardener living in a 2nd floor flat. Having had reasonable
success with a number of grow bags in part of the communal garden I took the
plunge and constructed a raised bed approx 10ft by 4ft and 18 in deep

Last year I had a major problem with ants, although the tomatoes were left
alone the carrots were chewed to death.

Although I dug out where I thought the nest was, this year they are back.

How do I get rid of them?

Are ant killers (powder) safe to use around vegetables?

Steve