you could get neem but it takes a few week before it works,but i used it with great succes in veg.
You can hose them away depending on how bad it is,they will normally die before making it back to the plant,or a pyrethrum spray will do it.

hope this helps to get rid of the little bastards.
bigguy
bigguy1977 Reviewed by bigguy1977 on . Need help with Aphids I am on week 4 of veg and I just got a mad rush of aphids that I cant kill. Im still very new to growing and I have only been sparying "Safe" bug spary every two days, with no luck killing them. I have been pulling all my plants out every two days to clean the room top to bottom. My room is a 8 foot by 6 foot room with 2 1000w lights. Fresh air intake with air filter, a 6" exhust fan going to the outside and one door to the room. What else can I try doing? Rating: 5