Last week I talked about some of the white spring flowers, but a whole array of white flowers bloom well into the fall. I can only mention a few.
White Flowers for Summer
One of the more unusual white flowers that grows in my garden is Artemesia lactiflora. Most of us think of artemesias as having silvery foliage and insignificant flowers. My Artemesia lactiflora grows in a very upright clump with reddish-maroon stems and very dark toothed foliage. The tall flower stalks have open sprays of small white flowers. It’s very hardy, deer proof and a good spreader.
When I looked up online nurseries for Artemesia lactifllora I saw that all the descriptions said it grew from four to five feet tall. Not in my garden. Everyone agrees it is not a demanding plant, and some say drought tolerant. The Plant Delights catalog says given a damp spot it will be spectacular. My garden is well drained. Maybe that explains its meager three foot height. Or the problem may be that I do not have Artemesia lactiflora Guizhou a particular cultivar. I don’t remember where my plant came from.
Garden phlox is a gorgeous midsummer bloomer that comes in many colors. It seems to me that interest in tall garden phlox has declined recently, with a matching decline in cultivars. Often the only available white is David which gained its fame because of its mildew resistance. Powdery mildew does not damage phlox, or even migrate to another type of flower, but many people find it objectionable. Phlox has no other real problems. David starts blooming in August and lasts into September.
I recently found an online nursery, Perennial Pleasures in East Hardwick, Vermont that specializes in phlox and sells over 90 phlox cultivars including Flame White, a very short white phlox, Flower Power which begins blooming in mid-July, Midsummer White which is very tall, mildew resistant, the earliest blooming of the phloxes and one of Perennial Pleasures favorites. There are other whites including the heirloom Miss Lingaard which is mildew resistant, and many other shades of pink, purple and blue.
Everyone loves daisies and Shasta daisies make it possible to have their cheerful blooms in the garden. Many Shasta daisies like Alaska grow to two feet or so and can get floppy, but that can be moderated by cutting them back in the spring. Tinkerbelle is a dwarf Shasta, only eight inches, and it is perfect for front of the border.
All Shasta daisies belong to the Chrysanthemum family, but are sometimes listed as Leucanthemum. Fluffy really looks more chrysanthemum-like with very double, shaggy flowers around a yellow center. Remember, all these summer bloomers like sun, good garden soil which should be enriched every year; they will tolerate some drought.
A wonderful vine is the pale moonflower vine. How lovely to have big white fragrant flowers that you can watch open as it gets dark. Moonflowers are like giant morning glories. Some people say they have trouble getting them to germinate, but soaking the seed for 24 hours can help with that. Once you have a thriving vine it may very well self-seed every year.
I grow white Henryi lilies near the house and they have been very happy at the end of my Herb Bed. I had the big glamorous white Casa Blanca lilies in the Lawn Beds, but deer always ate the swelling buds. If you don’t have deer Casa Blanca lilies are easy to grow and can tolerate some shade where they look especially beautiful. I haven’t had trouble with lily beetles, but that may be a blessing of the Heath climate.
White Flowers for Fall
Asters come into bloom in late summer and fall. Aster novi-belgii Bonningdale will reach a height of two feet or a little more and produce clusters of double white flowers around a yellow center. Asters should be treated like chrysanthemums by pinching them back until July 4 for stronger, bushier growth and more flowers. They should be deadheaded to prevent reseeding; Asters are tough long-lived plants that will make a substantial clump in two or three years when they can be divided. They are not fussy about soil.
Boltonia Snowbank, sometimes known as false aster or starwort, is a grand tall plant, up to five feet with starry daisy-like flowers. It can be pinched back in the spring or even be cut back for bushy growth in the fall. This is a vigorous plant that will need dividing every three years , but you can also dig up the new plantlets that spread out around the mother plant to give away. Because of its size and its exuberant bloom late into the fall this is a great addition to the perennial border. There is also a pink variety.
Before I started paying attention I thought of Japanese anemones as spring bloomers. However, it is Anemone sylvestris like Madonna that is the low growing anemone that blooms in the spring, in sun or shade and resistant to both deer and rabbits. Japanese anemone like the three foot tall Honorine Joubert blooms for a long season in late summer and well into the fall. Honorine Joubert has sprays of two inch flowers, white petals around a golden crown of stamens and a greenish center. Andrea Atkinson is similar except that it is shorter. Japanese anemones develop into generous clumps and they make quite a show in the fall. In spite of their delicate appearance they have strong wiry stems. I have enjoyed mass plantings at the Berkshire Botanical Garden in September
Between the Rows February 7, 2015