Long before my white supremacy garden (https://tonytomeo.wordpress.com/2017/09/21/white-supremacy/), I noticed that some white flowers were inferior to their more colorful counterparts. Brent (to the left in the picture in that other article I just cited) is often pleased to remind me of it. Only a few flowers are at their best in white. I, of course, am pleased to remind Brent of them. Then, he reminds me that black flowers are very rare, as if that makes them special. I then remind him that most black and dark flowers are pollinated by flies, so must imitate the fragrances of what flies are attracted to.
Callas, lilies, gladiolus, camellias, oleanders and dahlias all excel in white. They are at least comparable to their more colorful varieties. White callas, gladiolus and oleanders are actually superior to those more colorful. Some but not all varieties of rose, hydrangea, wisteria and tall bearded iris are exquisite in white as well.
Then there are plants like bougainvilleas, crepe myrtles, geraniums and angel’s trumpets that are less impressive in white. Bougainvilleas and crape myrtles just are not quite as bright in white as they are in their vibrant pinks and reds. White geraniums and angel’s trumpets are relatively weak, and white geraniums do not drop faded flowers efficiently.
Many white flowers do not even try to impress. They throw their pollen to the wind and let it do the work. Color is for flashy flowers that want to attract pollinators. Pyracantha and photinia flowers, for example, are neither colorful nor big and flashy, but are very numerous. They are somewhat fragrant, just in case some sort of pollinators happen to be interested. Other wind pollinated flowers do not even offer that much.
Nocturnal flowers that rely on nocturnal pollinators might be big and fragrant, but are mostly insipid pale white. Some are slightly blushed with yellow or pink. They are not bright white only because they do not actually use the brightness of their white to get noticed. They instead use ultraviolet or infrared color that is invisible to us. Many of these seemingly bland flowers have rather flashy patterns of stripes, spots and blotches that are only visible to nocturnal animals and insects who can see ultraviolet or infrared light. Many flowers that are active during the day use this technique in conjunction with visible color (that we can see) as well. Regardless, it does nothing for us, since we can not see it.
Some flowers are better left in the garden rather than cut and brought in. Society garlic, Tulbaghia violacea, looks like it would be an ideal cut flower, with nice bare stems. The aroma suggests otherwise. It smells something like a strongly aromatic combination of onion and garlic. Even in the garden, it might be a good idea to keep it at a distance. Deer and rabbits do not mess with it.
You can say what you like about nasturtiums. My landscape designer colleague, Brent Green certainly did when he named them ‘dago pansies’. They are still one of my favorite flowers, and just might be my favorite, even though none are convincingly white. They were my first. I discovered them when I was very young. They were growing near an old English walnut tree in my great grandfather’s garden. He noticed that I liked them, so found some seeds underneath to send home with me.
Modern garden varieties of pampas grass found in nurseries are generally non-invasive. Their flowers are described as ‘sterile’, and therefore unable to produce seed. What that really means is that they are exclusively female, and unable to produce seed without male pollinators. However, they have the potential to be pollinated by naturalized pampas grass, and sow a few hybrid seed.
Many people have a favorite color. I learned how seriously some people can take their preference for a particular color when I was in high school, and taking care of the yardwork for a few homes in the neighborhood. There were three tract homes next to each other. One was grayish blue, with a silvery blue Sedan deVille in the garage, and a garden of blue flowers. The middle house next door was soft amber yellow, with a buttery yellow Oldsmobile 98 in the garage, and a garden of exclusively yellow flowers. The house next door to that was iron oxide red, with an exquisite rich red Electra in the garage, and a garden of, you guessed it, red flowers.
The statute of limitations allows me to discuss this now. It happened thirty years ago, in the spring of 1987. The famous landscape designer, Brent Green, was my roommate in the dorms at Cal Poly, San Luis Obispo. As the bearded iris started to bloom, Brent immediately noticed a bed of uniformly pink bearded iris off the edge of a lawn in the inner campus. He watched it bloom from beginning to end, and occasionally updated me on the progress. During the process, he convinced me that these iris were very rare. Neither of us had ever seen pink bearded iris before. We had no idea that they could easily be purchased from mail order catalogs or nurseries.
‘Moonshine’ is probably the epitome of fernleaf yarrow, Achillea filipendulina, even though it is technically a hybrid. From the middle to the end of summer, its three inch wide corymbs (flat-topped trusses) of tiny bright yellow flowers stand as high as three feet above ferny and gray basal foliage. Bloom is best in full sun and warm exposure. Established plants do not need too much water.