black flies

My mum used to spray them with a very diluted mix of water and washing up liquid. She did the same with the roses to get rid of greenfly. She was so ahead of her time on the being a green gardener front.

The nasturtiums attract the blackfly and in doing so protect your other plants. Try emptying your washing up water over them. It's an old trick....not sure if it works but worth a try.

thank you . they are in pots so have moved them away from other plants. I will try and squash them but there are hundreds of them!

Squash them with your fingers and pick the worst leaves and bin them.

I was told that if you plant marigolds around them they deter the black flies.