Why Do Flowers Change Colors?
Three main types of plant pigments exist: anthocyanins, carotenoids, and betalains. Though these pigments are directly related to the visible colors in plants, the entire process which determines plant and flower color is quite complicated. Even cellular differences between plants can have a pronounced impact on color. Outside influences can also be a major factor which will affect plant color. This includes temperature, soil type, and even plant stress. Color changing flowers are often the result of soil conditions within the garden. Most notable are flowers that change color with soil pH. Specific species of hydrangea are best known for having this unmistakable attribute. While hydrangeas grown in acidic soils produce brilliant true-blue blooms, more alkaline soils may result in flowers that are shades of bright pink. Making use of color changing flowers in the landscape is an easy way to add interest to perennial flower beds as well. While these types of flowers most often occur on various types of shrubs and bushes, some annual and perennial flowering plants also change color. Many color changing flowers shift in hue as their blooms age and mature. One such example of this is Hibiscus mutabilis. This species of hibiscus produces white flowers, which then change to shades of pink. Throughout the season each shade of flower can be found on the plant, making it exceptionally ornamental. Color changing roses are also quite common. Low growing lantana is another good choice for flower beds. This plant’s unique, multidimensional blooms can also be attributed to each floret’s ability to morph color as it matures. Lantanas are exceptionally popular with hummingbirds, butterflies, and other beneficial insects.
