I respectfully disagree. The OP has three DD's, one of whom is ready for college now. Putting a 529 fund in her name for immediate use is wise, and because funds are needed soon, this account will be handled in a conservative way so that capital is available for immediate use.
DD's #2 and #3 however could be years away from college. Funds in their names should be set up and allowed to be handled more aggressively because there is more time for them to grow.
Example: We put in the same amount for all three kids when we set them up, but made the eldest one more conservative as he was going to draw from them soon (he didn't, but we thought he was going to). The middle child was a medium-type plan, and the youngest was more aggressive. This third account grew by more than $10,000 in five years. Granted, the market today is not what it was during this time period, but the eldest son's account grew less than half that amount. What the plan's manager will do depends on how quickly one needs to access the money. If the manager knows it's "safe" to invest for several years, he can put it into higher yield stuff. For example, a 90-day Certificate of Deposit does not have as high a yield as a 2-year one.
Just my two cents -- something the OP should talk over with her financial professional.
-Dorothy (LadyZolt)