I don't know much about geraniums, I was curious how you get two different colors on one plant. I bought a nursery plant last year and it bloomed happily pink and white striped until a few days ago, it now sports a vibrant red flower on it, I checked, it's on the same stem with the other striped ones. How is this?
Garden Fairy
Almost all of that irregular coloration in flowers is very unstable and will often produce as much as 10%-15% of solid colored blooms. There is an iris called BATIK and a perennial geranium called SPLISH SPLASH that has the same color pattern. There are several pelargoniums like this, including STARBURST RED, CONFETTI and DESIGNER PEPPERMINT TWIST. Sometimes you will even get a flower head that has some solid colored florets and some with the striping. Very cool.