A plant that can communicate? Based upon the color of the sand catchfly flower, you can tell what month it is. The light pink colored flowers blossom in May while the darker colored flowers appear around 6 weeks later! Sand catchfly grows primarily in the dunes. Occasionally you find it on sandy construction sites, but it is short-lived in such soils. It prefers open, sunny and dry places. It is often found in areas which have been strongly influenced by man, such as shoulders of roads or paths.