Just noticed plenty of aphid activity on a few plants, was thinking of (or
rather being nagged into) ordering some ladybird adults & larvae and a house
and food.

Would I be better off spraying the infestation with aphid-killer and
chucking 40 quid over the fence instead? I still have a hard time believing
that if I buy ladybirds, they're not going to bugger off into the atmosphere
without even a thank-you as soon as my back's turned. I reckon I might as
well buy a 40 quid jam jar full of air and release it into my garden, and
have the same chances of finding some of it still there the next day.

Anyone with opinions/experiences?