I love the dark flowers, the ones that are nearly black, but the thing is these flowers are not really noticeable in a garden setting from afar. As such a gardener is wise to add some white flowers to really brighten a garden. I have selected some of my favorites based on ease of growing. Ease of growing is also why I have selected Perennials, once planted, you will have years of enjoyment.
Astilbe
Astilbe is also referred to as False Spirea, Meadow Sweet, or False Goatsbeard, it is know for its feathery white plumes. Astilbe does best in a shady moist area, thus bringing bright color where it is needed most. It prefers acidic soil and I recommend adding peat moss, or other organic matter, at planting time to retain moisture. It comes in other colors and various heights. You can grow Astilbe in full sun provided the ground is moist enough.
Bellflower
As their name suggests Bellflowers have loosely spaced blossoms that are the shape of bells. They come in shades of purple and various heights. I really like the tall white ones because of their unusual appearance, almost a delicate airiness. They work well in bouquets and I am often surprised I don't see them in more gardens.
Candytuft
This is the shortest plant on the list and also the earliest bloomer. Candytuft produce sprays of small white flowers that will form a carpet of petals if you have enough plants. These perennials look very showy when planted under a deciduous tree, around an evergreen shrub, or in a rock garden. It is one of the few perennials which should not be cut back in the fall. Instead you should cover it with fallen leaves or snow for the winter.
Delphinium
Most people think these only come in blues and purples, but recent developments have seen white Delphiniums become available. I find these especially appealing when included in a planting of the darker colored Delphiniums. Plant delphiniums in rich soil or add some well rotted compost. I use tomato cages to provide stability to the tall spikes of flowers. In areas with longer seasons, a person can get a second showing by cutting the first flower spikes down low right after they are finished. Delphiniums are fast multipliers and will spread nicely.
Shasta Daisy
Daisy's of any kind are a must for any garden. The Shasta Daisy is a very easy to grow plant, and a sure attention getter. They will reseed themselves, so will spread if not deadheaded. They work very well in bouquets, and by cutting some flowers it is possible to extend the blooming season. Of all the plants I have mentioned, I believe this is the easiest to grow and care for.
Yucca
Not a plant on many "must have" lists, I am including Yucca mainly for people who have problem dry areas and need a plant. Yucca has an appearance much like a desert plant but is able to live through cold, snowy winters. It has sword like leaves and produces a tall stalk of off white flowers. Yucca will multiply and can be divided when you see new plants along side the original.
