Upload & Sell: Off
You may have already gotten your answer, but if you have the 18-55IS kit lens, a number of people have stated that it is not a bad close-up lens. Per the specs, it will do .33X at 9" at 55mm. So that would be fine for flowers and many other things. If you have that lens, give it a try as well.
Has anyone used this lens for close-up?