Susan - I think your ZD and MIP are a little ahead of mine. I think all my old garden roses are close to the same stage right now, a little bigger than chickpea size. The hybrid teas are all at different stages. The buds on my Peace roses look like they almost doubled in size in the past couple of days. My Belinda's Dream buds are still fairly small, with a few larger buds that look like they'll open within a few days. It is not easy to guess, and I don't know if I'm right, but now I am thinking I will have quite a few blooms in about ten days, which is close to right on schedule. I do think the warmth plays a huge factor, especially when it gets warmer overnight, like it has started doing here the past few nights.

Alot of factors, I think. Also, I have found that the blooms that last the longest on the bush have buds that open the slowest, regardless of the bud size. Also, some tiny buds open into big roses (Snowbird).