Daltons experts answer questions on gardening pests, aphids.
What is the best way
Control of aphids should begin with the first appearance of these insects, before the numbers multiply significantly. They do reproduce in the usual way in early summer, however in the peak of the season the females can produce enormous numbers of offspring without having mated.
I have these little black
It sounds like your plant is being attacked by aphids (there are different colours) which have a wide range of host plants they attack, especially those with soft new growth like chives.
I have a problem with
Aphids do have a wide range of host plants they attack, especially those with soft new growth like spring onions or chives. You are spot on in your observation of aphid numbers rapidly increasing at certain times and there is a reason for this.
I have grown chives but
It may be a good idea to select a different place in the garden to grow your chives. Choose a site that is sunny and has well drained soil. Add in Daltons Premium Garden Mix which will help with drainage and provide nutrients.