[cromptondot]

Can someone tell me wheredo aphids come from? I have a Croton.The second one,the first one started shedding leaves one at a time,they curled up,dried up,and fell off. Iwatered it,like the tag said,no luck. Now I am on the second one,the leaves started doing the same thing,I have it in a very sunny window,in a well drained pot,the tag says high light,high water.Yesterday I noticed it was covered with aphids,I treated it right away with the solution for that,today there is no sign of them but a leaf was still curled up,falling off. I use the same bag of potting soil in all my plants,but this is the only one affected. What can I do?:(