Posted: 21/05/2014 at 15:34
If you can see them with the naked eye and they are bright red, then they are not Red spider mites. They are generally too small to see and they are brown, not red. What you have is a large number of newly hatched 'blood spiders'. Nice useful things which grow up and eat greenfly etc.
Mites by the way have 10 legs whereas spiders of course have 8.