WISTERIA

Wisteria are vigorous, twining vines with wide landscape uses but gardeners must be  committed to keeping the wisteria in bounds as it can easily become invasive. Among their attributes wisteria are very hardy, vigorous, long lived vines with the ability to climb high. The wisteria plant is greatly valued for its large, pendulous flower clusters that occur in the spring. Flowers are pea-like and may be white, pink, lilac-blue, bluish-purple or purple in color.

 

 

Wisteria when kept with in bounds makes a stunning addition to any home garden

Wisteria when kept with in bounds makes a stunning addition to any home garden

The wisteria fruit/or seed is a long, green flattened pod that is not particularly ornamental.(inside the pod ,the seeds are flat round  and shiny resembling brown smarties but are  poisonous if ingested) The wisteria plant climbs by means of twining stems and has alternate, pinnately compound leaves. Older, established wisteria plants may have a twisted, woody trunk several inches in diameter.
Wisteria Plants that have been grown from seed remain in a long juvenile stage and often do not bloom for 10 to 15 years or longer.Wisteria  Plants that are grafted, and plants grown from cuttings or layered from a flowering Wisteria  plant will usually begin flowering much earlier than seedlings.

Wisteria Plant Profile

Plant type: woody ,perennial , spring flowering vine

Hardiness Zone 3-9

Plant Care category: easy ,Wisteria is one plant that seems to thrive on a certain amount of neglect

Bloom Time: spring ,May early June.
Color: wisteria blooms in an array of colors Violet/Lavender,Purple ,mauve ,bluish pink lilac,Fairly long flowering up to 2 months with possible second lesser show in September on some wisteria varieties..particularly those varieties natural to the US.

Size Height and spread 15-30 ft.

Uses:  divider, used on trellis or arbors covers unsightly sheds and garages

Light Requirements: Sun to Partial Shade, In order to bloom well, wisteria require a full sun (six or more hours of direct sun per day)

Soil Requirements: moist, dry, rich, but will tolerate poor soils but wisteria Prefers deep, moderately fertile, moist soil that does not dry out excessively. Wisteria  will adapt to most soils, though they prefer a neutral to slightly acid soil pH of 6.0-7.0 for best results.

Pruning: lite pruning in July heavy pruning late October to January Annual pruning is required to maintain wisteria plant quality; it is not advisable to allow the wisteria vine to grow randomly and take over surrounding plants and structures.as it is invasive by nature Pruning will also help reduce the vigor of the vine and promote flowering.

 

Wisteria in blossom

Wisteria in blossom

Other details:The wisteria  is attractive to bees, butterflies and/or birds

Foliage:Deciduous ,Smooth-Textured

Seed is poisonous if ingested
All parts of plant are poisonous if ingested
Wisteria  Self-sows freely; deadhead if you do not want volunteer seedlings next season

Propagation Methods:From woody stem cuttings,From semi-hardwood cuttings.The wisteria vines that you purchase from the garden centers  have usually been grafted, layered or taken from cuttings.  if you want to add to your wisteria stock,start additional vines from your own wisteria plant, by layering the lower side shoots ,it is the easiest method  to follow. Do this in the spring. Actually the lower growing wisteria  vine tendrils  will often come into contact with the ground and root on their own. Simply cut the new rooted wisteria shoots away from the mother vine and you have a new wisteria plant. Best time to do this is in springtime.
A 12 to 18 inch  wisteria vine tip  can often be started in water alone. but  the addition of a  little rooting hormone to the water, may help speed up the  process. Smaller cuttings 6 to 9 inches long can also be started in soil. Whether you do it in soil or water, the best time is to take these cuttings is in the late winter, just before the wisteria s new growth starts.
New wisteria vines can also be started from seed, but seedlings are very slow to flower. It may take 8 to 10 years or even longer for the first wisteria blooms to appear.
Wisteria is difficult to move once established, so it is important to plant where it can remain undisturbed.

The biggest frustration often faced  by gardeners when growing wisteria is that the wisteria tends to  have a longer than average juvenile period (the period before it becomes mature enough to  blossom) and sometimes fails to bloom at all.  The best bet is to start with grafted wisteria plants or those produced from cuttings rather than those grown from seed. The wisteria may also fail to flower if it doesn’t receive adequate  sunlight;   also the wisteria will not volunteer many blooms if it has been over fertilized  an indication of this is there is excessive vegetative growth around its base stimulated by excess nitrogen fertilizer;it can also fail to flower if it is pruned too heavily in winter and spring, Wisteria flowers develop in buds near the base of the previous year’s growth,so be careful. Also, in severe winters, wisteria flower buds may be injured or killed by cold or frost.

 

Wisteria in flower always reminds me of bunches of grapes on the vine

Wisteria in flower always reminds me of bunches of grapes on the vine

Some practices that may  induce non-blooming Wisteria to flower: a heavy application of a super phosphate fertilizer ,it is often said that a wisteria can be shocked in to producing flowers by severe pruning of new growth in late spring or early summer,or by  root pruning in late fall, Root pruning of wisteria vines  serves to check top growth and favors flower production and must be combined with summer pruning to be effective. Use a spade to cut vertically into the soil (about 18 inches deep) and about four feet from the main trunk, all around the wisteria vine.
INSECT AND DISEASES That Trouble Wisteria Vines

On the whole Wisteria is a pretty trouble free vine and is seldom bothered by insects and only occasionally by problems like mildew.

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9 Responses to “WISTERIA”

  1. carol Says:

    I planted two new wisteria plants. One plant is getting spotted yellow leaves. Is this normal? Any suggestions?
    Carol

  2. wanrey Says:

    The yellow spotted leaves could be from transplant shock. While wisteria is a hardy plant, new actively growing vines do need to be watered on a regular basis until they establish a root system.

    Leaf Spots (fungi – Phyllosticta wisteriae, Septoria wisteriae): Different fungi may cause leaf spots on wisteria. Pick off and destroy spotted leaves. Fungicide applications are normally not necessary.

    Leaves Mottled, Distorted indicates Mosaic Virus
    Viruses are transmitted to wisterias by aphids. The first symptom is usually a yellow spotty discoloration, a “mottling” or “mosaic” pattern on the leaves. Eventually the plant dies. There is no cure, and infected vines should be removed. Prevent virus outbreaks by controlling aphids, keeping weeds down, and sterilizing tools used for pruning other plants or cutting flowers.

  3. carol Says:

    Thank you for your help. How can I tell the difference between leaf spots (fungi) and leaf mottled (virus). Both have yellowing spotted leaves. I do not see any aphids. I did however just plant the wisteria about 5 weeks ago. Plant is rapidly growing but even new leaves are showing spots.
    Any help you could share would be appreciated.
    Carol
    8/5/08

  4. Naser Breca Says:

    Can someone tell me if Wisteria is poisonous or not ’cause today I got an email from a friend and Wisteria was ranked as the first poisonous plant in a row of ten other ones.

  5. BEX Says:

    MY WISTERIA MUST HAVE HAD 1000 FLOWERS EITHER STARTING TO BLOOM OR IN BLOOM.. WE HAD A BAD FROST LAST WEEK AND NOW THEY HAVE ALL SHRIVLED UP AND ARE HANGING LIMP ON THE VINE. WHAT SHOULD I DO TO REVIVE MY BEAUTIFUL PLANT? I HAVE TWO PLANTS. ONE ON EACH SIDE OF AN ARBOR IN MY GARDEN. THEY SEEN TO BE PRETTY HARDY AS I PRUNE THEM ALL THROUGHOUT THE LATE SPRING, SUMMER AND EARLY FALL. I LOST ALL OF THE BLOSSOMS LAST YEAR TO THE FROST BUT HAD A FEW LATE BLOOMERS IN THE LATE SUMMER. I BELIEVE BOTH PLANTS TO BE AMERICAN WISTERIA.

  6. helen Says:

    My wisteria is over a fish pond on a trellis the leaves are constantly falling off, this is a mature vine and other wise looks very healthy what could be the problem

  7. wanrey Says:

    To be quite honest I don’t really know you haven’t supplied much info off hand the only things that I can think of is if vine is very close to pond it may be too damp for it ,wisteria does not enjoy damp conditions, second possibly Mealybugs (Small, wingless, dull-white, soft-bodied insects that produce a waxy powdery covering.) They attack a wide range of plants, Mealybugs can weaken a plant leading to yellow foliage and leaf drop.Mealybugs often look like small pieces of cotton and they tend to congregate where leaves and stems branch.Only thoughts on topic without more information

  8. Ginny Says:

    I am having some trouble establishing my wisteria. It has been in the same spot for 5 years. Full sun with a trellis to grow up and every year it just re-sprouts from the roots with new growth but the vines from the previous year don’t produce any leaves or new growth so I end up just cutting them back in the late summer when I am sure they are not going to do anything else. Someone said the soil may not be acidic enough? What do I do to change this?

  9. Jordan Says:

    Thanks for all of the information, but I have a few questions.
    I got my mother a Wisteria close to eleven years ago and it’s never bloomed. We haven’t been pruning it in the seasons that you suggested, and when we do it’s pruned dramatically. It looks like a very healthy plant with light green levees. Could our lack of proper pruning be the cause behind our lack of blooms?

    My second question is about the propagation. We might be moving soon and we don’t want to leave without our wisteria, how long does it take for the different methods to produce roots? Right now I’m trying the hard wood method and I’d like to know when I should check for roots.

    Thanks again.

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