On 23 Oct 2006 09:54:51 -0700, Doug wrote:

The variety is Imperial Giants. I planted them in early May. I think
the packet said they bloom in 55-80 days. They've had plenty of time to
mature.

In my experience, garden stocks are pretty bombproof if grown in full sun,
moist but well drained soil, neutral to slightly alkaline pH.

If those are your growing conditions, could they have gotten too much N?

Kay