Actually , most of the time the ants dont cause any trouble , except if they are " farming " aphids and in this case carrying and transporting them all over your precious plants . ...but if they are seriously disturbing the roots of my veg seedlings ,then I make an ant hotel with a nice terracotta flowerpot ..which they absolutely love and quickly move in soil and all the vast family . I have tipped this one gently over so that you may see inside .... when it is full , you just slide a tile or a spade under it and gently relocate them somewhere else , where they wont be a nuisance .
I had billions of the little wotsits running over my hands ,crawling up my legs and everywhere whilst I planted out the young Courgette plants . They cling on and bite ! Ow ! Ow ! Ow !