Thea,
The German web site (you can get the link on the reference page) chronicles spring and summer looks of the cultivar plus flowers. They also show plants from a number of different growers. So you might do winter, spring, summer plus flowers, when they occur.
Plants look very different in different gardens. I'm always amazed how much brighter the colors of Lynn's semps are compared to mine and she's about 10 miles away! Melissa grows mine so big that I can't believe them! I'm sure you'll find that many of your cultivars don't behave exactly the same either.
Kevin
