2 of my Aster plants are dying (I think?)?

I planted Asters in my garden in early September. Two of the plants' flowers curled back and appeared to die. Is this just seasonal or are they sick? Should I replace them, or will they return in the Spring? There is no mold or other obvious diseases on them.

FlowersBirthday FlowersSympathy FlowersCheck the plants for aphids. They're little greenish looking bugs. Here's a link on aphid control...


http://www.planetnatural.com/site/xdpy/k...
Reply:Check out the site called the gardenweb,it should help u with this..good luckmake up