Terrible infestation here for the last couple of months - even the new shoots of plants which are never normally affected are covered. The only effective (organic) way I’ve found of getting rid of them is squishing them by hand - yuk! Then a day or two later, they’re back. The air is full of them on an evening. Normally by now the ladybirds and birds have got the situation under control - but not this year, even though there are plenty of ladybirds about. Just too many aphids, I fear. Guess we have last summer and a mild winter to thank.