Wisteria is no wimpy flower. This ferocious vine is not short in size, fragrance, or fame.
Wisteria hysteria season is upon us. The insanity may manifest as a celebration of scent and beauty or a grumbling about being squeezed and suffocated.
Wisteria has a white, pink, or purple flower punch whether you like it or not. Some people suggest that this plant’s flowers can be consumed raw or cooked, used to produce wine, or both. Others vehemently disagree, claiming that the entire plant is poisonous, particularly its seeds. According to one source, two uncooked seeds are all it takes to kill a child. Additionally poisonous to cattle and pets, this plant.
Its appearance and smell are distinctive. Japanese novelist Murasaki Shikibu appreciated its timing and fragrance: “And then just when your regrets are the strongest the wisteria comes into bloom, and it blooms on into the summer. Nothing else compares to it. Even the color has a kind, welcoming quality.
Yosa Buson, a Japanese poet, was even more straightforward in his appreciation, writing: “In faint moonlight/the wisterias scent/comes from far away.
The size of the wisteria can also be important. It has been said that vines can grow to 65 feet high and 32 feet broad. The biggest wisteria plant was planted in California in 1894. It has 1.5 million flowers, is larger than an acre, and weighs more than 250 tons. Possibly the oldest wisteria that is still standing is the Great Miracle Wisteria in Tochigi, Japan, which is about 140 years old. The wisteria tunnel in Japan’s Kawachi Fuji Gardens, which has 330 feet of wisteria from 150 plants of 20 different species, may be even more amazing.
Never claim that wisteria is only a vine with no fruit. Even the vine itself is lethal. Wisteria can grow up to 10 feet in height in a single year due to its voracious growth. Other plants have been strangled and twined by it. Despite the fact that wisteria is not officially on the Massachusetts “do not plant list,” some kinds are regarded as invasive in particular regions. One non-climbing species can grow into thickets that obstruct the development of other plants.
Only two of the ten species of the genus, the American and Kentucky wisteria, are indigenous to the United States. Native plants can be a significant larval host for several butterflies and moths because they feature shorter, denser flower clusters, flower stalks that are less than one centimeter long, and hairless pods. The foreign plants, which are distinguished by taller flower clusters and stalks as well as dense, hairy pods, originated in Asia, were widely scattered across the country, and frequently eluded cultivation. Wisteria’s name, which can alternatively be written wysteria or wistaria, adds to the dualistic nature of the plant.
However, wisteria occasionally lets down those who adore it. It has a long lifespan and might take up to 20 years to bloom for the first time. Try these advice if your wisteria is crooked and won’t bloom: To force the plant into bloom, you can either apply triple phosphate fertilizer or, if you’re in a really ferocious (or violet) rage, slice or cut into its roots.
If you are able to force the flowers, you will have a thing of beauty and potentially everlasting joy because wisteria doesn’t have a tendency to wither on the vine, whether you want it to or not.
Author of Martha’s Vineyard: A Field Guide to Island Nature and director of the Felix Neck Wildlife Sanctuary in Edgartown, Suzan Bellincampi.
Wisteria trees are able to grow in New England.
Nothing is more beautiful than a wisteria vine in bloom in the spring. The hanging vines are covered in long, pendulous clusters of pea-like flowers in delicate pastel colors. The blooms grow in huge clusters and have a strong fragrance. Except for a few reblooming flowers in the late summer, the floral display unfortunately only lasts a few weeks before it is over for the year. Wisteria, though, serves additional purposes. As long as it is grown on a stable structure, the quick-growing vine can swiftly grow in a counterclockwise direction and provide a superb screen and cover for a pergola. Simply keep it clipped or it will take over the entire planet. Compared to Chinese species, Japanese wisteria is more resistant to winter weather.
Wisteria may grow in numerous locations around our region because it is hardy in zone 4’s warmer regions. It might thrive and endure in New England’s colder regions, but it might not consistently blossom each spring. Purchase plants from a nearby garden center, then plant them in well-drained, compost-amended soil in the summer or in the spring after all risk of frost has passed. Wisteria does not thrive in dry soils and need full light to regularly flower. Plants should be placed 5 feet apart close to the trellis or posts where they will climb.
To keep the soil evenly moist and lessen weed competition, water the soil thoroughly and cover the soil with bark mulch. In the spring, fertilize wisteria with an organic plant food.
The major issues with wisteria are a lack of blossoms and excessive growth. Reduce the size of the wisteria in late winter to encourage better blooms. For further information on how to prune wisteria vines, contact your neighborhood garden center or Master Gardener club. To guarantee spring blossoms, grow branded kinds that can withstand your climate. It could take a seedling many years to reach the blossoming stage. Grow the vine on a sturdy pole or structure because it can become very heavy as it ages. Various insects and diseases may harm the leaves, but none of them pose a serious threat. In our area, wisteria has the potential to spread. Deadhead to stop the seeds from germinating and growing.
Wisteria can be grown up a fence, pillar, arbor, or pergola. It works well as a shade structure’s cover. It should be planted in the back of a perennial border, behind perennial roses, hydrangea, and bee balm. Wisteria can be encouraged to grow up an old tree to make it appear to be growing again.
A white flowering cultivar is called “Alba.” A pinkish-white cultivar with a powerful scent is called “Rosea.” The blue cultivar “Lavender Falls” has a pleasant scent and quickly blooms again. The Kentucky wisteria variety known as “Blue Moon” (W. macrostachya) is more hardy than other kinds and is less aggressive than the Japanese wisteria.
Cambridge: Harvard University
The Harvard campus is close by, as are two of the most magnificent Boston homes covered in wisteria forms. The wisteria mentioned above can be seen on Cambridge Street, just north of campus. There is nothing quite like the wisteria-covered balcony vista shown above in Boston. You wouldn’t know that this house is right off a busy street. This charming New England house seems like it belongs in a rural fairy tale!
South of the school, there is a home with wisteria covering it. Don’t go too far or you might miss Corporal Burns Playground, so make your way there! If you’re fortunate, you might even see this classic Volkswagen Beetle outside.
Boston: Louisberg Square
Every year, it’s breathtaking to witness the wisteria decorations that surround this corner brownstone in bloom. Be sure to visit if you’re strolling through this Boston area.
Boston: Arnold Arboretum of Harvard University
This next spot can be found at the Arnold Arboretum’s Leventritt Vine and Shrub Garden. It’s a pleasure to stroll through this immaculately kept public area in any weather. Google Maps makes it simple to find the spot; otherwise, just look for the numerous lilac bushes. Directly across from that area of the arboretum will be the entrance.
Jamaica Plain: Jamaica Pond
This next spot, which is a part of the Emerald Necklace Conservancy, lies on the western side of Jamaica Pond. In the spring, it’s well worth a trip because of the neighboring cherry trees that bloom and are also very attractive.
Brookline: High Street Hill
My very favorite city is Brookline; perhaps I’m a little biased since I live there. Wisteria is easily spotted in this area just outside of Boston. In the High Street Hill neighborhood, you can find a few balconies and porches covered in wisteria, like the one below!
How is wisteria grown in New England?
There are species of this climbing vine from the pea family that are native to the US as well as Asia. Pergolas, arbors, fences, walls, and automobiles are all engulfed by its rabid growth. Wisteria is a type of vine.
The wisteria vines are magnificent. In Philadelphia one April, I saw a Chinese wisteria vine encircling a telephone pole covered in fragrant, purple blossoms. It was intoxicating to smell!
The Kentucky wisteria, or Wisteria macrostachya, is the greatest variety to grow in the North, although we are more familiar with the Japanese and Chinese kinds, like the one I saw in Philadelphia. The hardest-working wisteria, it can survive our harsh winters and still blossom in May. It’s also less forceful, making it simpler to stay within boundaries. “Blue Moon” and “Aunt Dee” are being raised by Wendy and me. Even though they produce fragrant, purple blossoms, the vine only grows to be about 15 to 20 feet tall.
Wisteria thrive in the sun and on good, well-drained soil. Having a solid support structure is essential for this vine’s growth. Over our deck, a sizable pergola is shaded by our vines. Alternatively, a strong arbor, fence, or wall will do. Simply space the vines on the trellis at least 6 inches from siding or a wall.
Pruning is the second essential. Wisteria can become out of control and perform poorly if it is not pruned twice a year. After first-year vines have been trained up a pole or other supports to the proper height, they are then topped and allowed to spread out into framework branches. Allow one leader to emerge from each framework branch each summer and prune any side branches. Reduce these leads by half in the winter. Any side branches from the previous season should be pruned back to a length of 2 inches. The supporting branches will gradually cover a space, and the side shoots will develop into brief flowering spurs.
The advice for this week is to trim back overwintering geraniums growing in a sunny window to prevent them from becoming overgrown. As a result, the plant will become stockier and bloom in April.
I’ll be discussing ground nuts on the Vermont Garden Journal the following week. I’ll see you in the garden until then.
The ideal places for wisteria to grow.
According to Kirsten Coffen, a landscape architect and designer based in Maryland, “its gorgeous spring-blooming cascade of purple (or white) scented flowers is best observed when trained on a structure, such as a robust pergola.”
Such a lush, floral canopy offers delightful shade throughout the sweltering summer months. According to Irene Kalina-Jones, a landscape designer at Outside Space NYC (opens in new tab), “We plant it on rooftops in the city, training it to cover pergolas to create shade.” “But I enjoy it grown against buildings, too,” you say.
Wisteria grows best in full sun in a protected location, such as a south or west-facing facade. When planting, work in a lot of organic matter (such as compost) to ensure that the soil is rich and well-drained.
If you want to grow wisteria up a wall or the front of a house, put some effort into building a strong structure that it can climb over many years. A tensioning system of wires is possibly preferable to a wooden trellis because wood can rot. The wires must either automatically tighten as the plant gains weight or be simple for you to tighten (via turnbuckles, for instance).
Can I grow wisteria in New Hampshire?
Even though they can grow and survive in New England’s colder regions, some plants do not bloom continuously all year long. Despite its vigorous growth, wifternia does not do well in drier soil since it need full sunlight to thrive.
Can wisteria harm my home?
In order to support the massive vine, the wisteria’s root system extends out widely and dives deep. Do wisteria roots exhibit aggression? Yes, wisteria’s root system is highly aggressive. Avoid planting wisteria next to walls or walkways because of its extensive and strong root system. These are easily harmed by a wisteria’s root system.
Experts advise inserting a corrugated panel about 6 feet (1.8 m) long and several feet (1 m) broad beside the plant to redirect the roots if you find a wisteria close to a building or pathway.
How resilient to cold is wisteria?
It is well known that wisteria take a very long time to bloom. For two to three years after planting, don’t anticipate blossoms. Some readers swear by the following technique to encourage blooming:
- To cut into part of the roots, take a shovel and drive it 8 to 10 inches into the ground approximately a foot and a half away from the main trunk of the wisteria.
- Approximately half of the roots should be damaged for the shrub to be shocked into reproduction (flowering).
- Don’t worry—impossible it’s to harm this unchecked, unwieldy, frequently invasive shrub!
- The flowers of wisteria can also be impacted by chilly winter temperatures.
Native Wisteria
Consider growing a wisteria species that is indigenous to North America if you live there, such as:
- Wisteria frutescens, also known as American wisteria, thrives in zones 5 through 9. Its original states span from Virginia to Texas, the southeast to Florida, and up into New York, Iowa, and Michigan in the north. The vine is 25 to 30 feet long, has glossy, dark-green leaves, and after the plant has begun to leaf out, develops huge, drooping clusters of lilac or purple-blue flowers. Only new wood will display the blossoms. Notably, the blossoms are typically less aromatic than those of Asian wisterias.
- In zones 4 to 9, Kentucky wisteria (Wisteria macrostachya) flourishes. Similar to American wisteria, this late-bloomer is a native of the Southeast of the United States (it is sometimes considered a variety or subspecies of American wisteria). The Kentucky wisteria is the quickest to blossom, bearing faintly fragrant bluish-purple flowers after only two to three years of growth.
- A gorgeous, silvery-blue cultivar of the native Kentucky wisteria called “Blue Moon” is particularly hardy. In late spring or early summer, it blooms. It can go as chilly as -40F. (-40C).
Non-Native Wisteria
- Despite the fact that they are frequently marketed at nurseries and garden centers, Chinese wisteria (Wisteria sinensis) and Japanese wisteria (Wisteria floribunda) are non-native, invasive species, hence we do not suggest them for North American gardens. They can reach lengths of 30 to 60 feet and are hardy in Zones 5 to 9. (and beyond in the Southern U.S.). Japanese wisteria comes in two popular kinds, including:
- Popular plant known as “Honbeni” displays clusters of pink flowers in the late spring.
- “Alba” (also known as “Shiro Noda”) yields beautiful clusters of snow-white flowers in the late spring.
Are Wisteria Toxic to Pets and Humans?
Yes, the wisteria plant contains lectin and wisterin, which are poisonous to people, animals, and even pets. If taken in significant quantities, these poisons can result in anything from nausea and diarrhea to death.
If pets or young children frequent the area, it is a good idea to remove the seedpods after the plant has flowered because the material is particularly concentrated in the seeds and seedpods. Unaware children or animals won’t think twice about eating as many seedpods as they can because they are not unpleasant to taste or have an instant effect. In case of ingestion, contact your neighborhood poison control center.