Magnolia sheds leaves


Question: magnolia sheds leaves

Good morning, after the great cold, my magnolia has lost many leaves and the remaining ones are more opaque than usual, what can I do to reinvigorate it thanks.


Magnolia is losing leaves: Answer: magnolia is losing leaves

Dear Walter good morning and thank you for writing to the expert of our website. First of all, in order to be able to answer them more fully, we should understand what type of magnolia it is and especially if the plant is in a pot or in the ground.

The winter just ended was a very harsh winter and some garden plants suffered a lot from the low temperatures. It was also a very dry winter and where the cold did not hit it was the lack of water that weakened many plants. The evergreens in fact maintain a vegetative level even in winter which, although low, requires a minimum amount of water to ensure that the plant does not go into water stress.

To exclude any parasitic attacks, we advise you to check the apexes, leaves and buds of the plant, in order to check if there are ongoing attacks of pathogens or parasites.

Once the presence of any diseases has been excluded, we recommend that you fertilize the plant and irrigate frequently in order to accelerate the improvement of the plant's health conditions. Over time the plant will recover from the damage of the cold and will return to the appearance and color of last year.



Filippo di Catania asks:

It would appear to be a fungal attack of cersospore or something similar.

Fungi attack plants under stress, perhaps excessive heat, drought.

I could slightly and I would leave it to the will of the plant to drive back vigorously in spring, a passage of a cupric it certainly wouldn't hurt.

Paolo Zacchera


Considering the many species and varieties, it must be premised that, with the exception of a few evergreens, magnolias are for the most part deciduous and can be divided into two groups: those that bloom before emitting the leaves and those that bloom after emitting the leaves. The most famous and most useful magnolias for a spectacular spring flowering belong to the first group, such as Magnolia campbellii, Magnolia stellata, Magnolia denudata, Magnolia kobus, while Magnolia liliiflora emits leaves and flowers simultaneously.

The most common species in Italy as ornamental plants are:

Japanese magnolia

Its name is magnolia kobbus, also known as Japanese magnolia due to its origins. It has a compact habit and in pot it can reach a height of 3 - 4 meters.

This species tolerates calcareous soil, so it does not require special attention in irrigation: however, it is preferable to use distilled water, such as water from the conditioner, but if the tap water is moderately calcareous it will not be necessary to acidify it.

Its flowers are starry and appear before the leaves, between the months of March and April.

Magnolia obovata

This species occurs naturally in high mountain forests in Japan and in the Russian Kurile Islands, where it grows on the slopes of active volcanoes. It is the origin of many common Japanese magnolias grown today. Its leaves are so large that they are used in Japan for wrapping and preserving food.

Magnolia denudata

It is one of the 'mother' species of modern magnolias, cultivated in Buddhist temples as early as 600 years before Christ. Today it is the official flower of the city of Shanghai.

Magnolia precia

Native to eastern Asia, it produces white and fragrant flowers with deciduous foliage.

Magnolia glauca

Originally from America, it produces tulip-shaped flowers of a creamy-white color, fragrant, with summer flowering.

Magnolia grandiflora

Mangolia grandiflora is one of the most common plants in gardens. It is a gigantic tree: it can reach 25 meters in height and is an evergreen plant. The roots represent almost a third of the mass of a tree, we keep this in mind when we decide the location.

It has a medium-slow growth but in 4 years it can grow 12 meters safely for small medium gardens dwarf varieties such as'Little Gem'(The dwarf magnolia'Little Gem 'Is an optimal choice for those who have a space in a small garden: in 15 years it can reach 3.5 meters in height).

It has a sturdy and erect trunk, dark bark and a very thick cone-shaped crown.

The leaves are lanceolate, dark green on the upper side. The flowers are cream colored and appear from May to September. They release a very pleasant scent.

It should be placed in partial shade or in the sun, depending on the climate. It loves humidity and rain very much, which is why we find it mostly in the North.

Magnolia macrophylla

Unmistakable for its giant, deciduous and slightly delicate leaves, of a soft green color, 80-100 cm long, it produces large, creamy white flowers. This plant is appreciated more for the size of the leaves than for the flowering, which, moreover, occurs in the summer is less noticeable.

Magnolia sieboldii

The sieboldii variety is native to southern Asia. It blooms in summer, producing very large, cup-shaped flowers. The color ranges from white to pink.

The crown is rounded but develops in width. The leaves are oval and dark green. In autumn they turn yellow.

Magnolia acuminata

Another very interesting species is the acuminata, native to North America. In this case the tree is up to 30 meters high.

The flowers are yellow and green and appear in spring to last until mid-summer. The leaves are green and elliptical in shape. The fruits are similar to cucumbers and are a beautiful bright red.

Magnolia Jade Lamp

It is perhaps the most elegant species with its pure white flowers with soft petals. Also in this case it is a shrub with deciduous leaves, which emits abundant flowering in early spring, before the leaves appear.

Magnolia liliiflora

It is a shrub with deciduous leaves, up to 3 m tall, with fragrant, open flowers of white-pink color internally, red-purple on the outside. It is characterized by the abundant and fragrant flowering, which fills the plant from April. It is very weatherproof and withstands cold down to -20 ° C.

Starry magnolia

magnolia stellata - Public Domain

The star magnolia is a tree native to Japan, which tolerates low temperatures well. In the open ground it can reach a maximum height of 5 meters while in pots it reaches a maximum of 3 meters

It has a rounded crown and deciduous leaves, which from a light green color reach bronze in autumn. It gives a beautiful flowering in spring, with star-shaped flowers, white or pink in color. Each flower is made up of about ten long petals.

Magnolia starry is also available in the pink-flowered variety: Magnolia stellata var. Leonard Messel, has the same development as the white-flowered variety plus it is very fragrant. The stellate Magnolias are suitable for use in even mixed and spontaneously growing hedges, even if there are specimens even 5 meters high, as a rule they do not reach 300 cm.

Magnolia soulangeana

It is a deciduous plant with an imposing height: depending on the variety it reaches up to 6 meters and more. Flowering is abundant and limited to spring. It is a hybrid species. Its characteristic appearance is given by the foliage rich in branches and the rounded shape. The leaves are deciduous and dark green.

In spring, flowers similar to tulips appear but with a longer shape, up to about 10 cm. The colors range from white to pink and purple. The following varieties are known:

Magnolia solangeana var. superb sunrise

It is also referred to by many growers M. soulangeana julan: has pure white flowers and large, light green leaves that reach the size of 14 cm and 10 cm wide.

Magnolia solangeana var. soulangeana

It has the same characteristics as the previous variety, it differs only in the color of the flower: pinkish white.

Magnolia solangeana var. satisfaction

It is a new variety introduced by the Dutch, slightly smaller flowers, light pink inner petal and deep pink outer petal.

Magnolia solangeana denutada var. yellow river

It is a new variety introduced by the Dutch, it produces flowers that are generally slightly smaller than the classic soulangeane and its characteristic is its color: yellow.

Magnolia solangeana var.red lucky

It has a wonderful goblet with a light pink background with streaks of deep pink that start from the base of the flower and fade as it rises.

Magnolia delavayi

It is a small evergreen tree, a little sensitive to intense cold, but above all sensitive to snow that can break the branches. It is an evergreen with large, not shiny leaves. Even in this species, the flowering, not very showy, occurs in summer, the flowers are creamy white and almost yellow.

Magnolia Tripetala

It is a stripping species with leaves that can reach 60 cm, it produces white flowers.

Magnolia Wilsonii

This species is a small deciduous tree or shrub, with the characteristic of having pendulous, cupped, white flowers with very evident dark-colored stamens.

Magnolia campbelli

This species can also reach large sizes, it is stripping, with large leaves, such as white or deep pink flowers.

Other varieties

Among the deciduous Magnolias, the Magnolia George Henry Kern, which produces semi-double and fragrant calyx flowers in April and July, of an intense pink color with a white interior. It is obtained from the crossing, in this case between the Magnolia Stellata and the Magnolia Liliflora Nigra.

For color lovers, we recommend the Magnolia Susan which in April and May produces many flowers in shades of purple and purple in the shape of a tulip.

For lovers of the beautiful yellow Magnolia Yellow Lantern which in April and May, before the formation of the leaves, produces many tulip-shaped buds of a straw yellow color.


How to prune the magnolia without damaging it

For a correct and complete operation, worthy of a professional gardener, it is necessary to proceed step by step.

The perfect time to intervene with the magnolia pruning is June, before the summer heat and after the first flowering, so as to lighten the plant and allow it to grow stronger.

Arm yourself with gardener's shears, saw, branch cutters, fertilizer (preferably liquid) and gloves.

First it is essential disinfect tools immersing them for half an hour in a solution of hydrogen peroxide, so as to kill any plant bacteria.

Proceed with the elimination of dry, broken and damaged branches.

Now you will have a complete picture to intervene with the real pruning, giving the magnolia the shape you prefer.

Proceed by cutting i branches from the canopy and without damaging the tree, so as to avoid unpleasant consequences.


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16 Answers:

This answer was helpful for 2 people

I should have more details in order to give you an answer.

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Green Garden

This answer was helpful for 1 people

the magnolias are not pruned after winter
let us ask ourselves what magnolia is
and where and
soil analysis in the first place
visual leaf analysis

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This answer was helpful for 1 people

Good morning,
the problem in similar cases is always to be found in the root system, as already written in another post.
It is possible to intervene with an injector pole in the soil and to administer soil bacteria, enzymes, fulvic and humic acids and certainly, the Trichoderma fungus which protects the roots and induces resistance in the plants.
Another possible intervention is the injection to the trunk with biological fofsphites. the plant changes appearance in a few weeks (sometimes days).

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Parks and Gardens

This answer was helpful for 2 people

Good morning Mattia,
without photos it is not possible to make a diagnosis, but the most plausible is ferric chlorosis. You may try to administer chelated iron (one of the products used is Sequestrene, following the directions on the package).
Keep us updated.
Sincerely,
Fabrizio Di Meo

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Domos Consulting Snc

This answer was helpful for 1 people

Hello,
in my opinion it is not a fungal disease, as fungi occur with fairly high temperatures and rains. If during the winter period with low temperatures, the problem remains must be something else. My advice is to have the whole plant by an agronomist, before carrying out any unnecessary operation or treatment.
For Agr. Fabio Ferrara -

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Vigne E Giardini S.n.c.

This answer was helpful for 2 people

it could be a ferric chlorosis (iron deficiency), and the causes can be the most varied.
The cure is the administration of chelated iron (SEQUESTRENE), I would do a shock treatment: 40 gr. at the base of the plant, moving the soil and burying it, then water after 3 days you give it by foliar, 10 gr. for 10 l. of water, well mixed and diluted, the best thing is to dissolve for example in a 1 l plastic bottle. the 10 gr. with 1/2 l. of water, shake the bottle very well, when it is well dissolved pour the mixture into the sprayer, add the remaining 9.5 liters, spray it IN THE EVENING on the plant, wetting all the leaves well.This treatment can be repeated after about twenty days, while the radical nourishment can be repeated after 10 days.
To recap: day 1: at the root - day 4: at the leaves - day 10: at the root day 20: root day 24: leaves, day 30: root (at this point the Magnolia should have recovered if needed, you can redo via folgiare at 44 Day.) Clear? In a month you would consume 140 gr. of seizures, they sell it in boxes of 1 kg so you can still have leftovers (keep in a cool place!)
Do not miss the water. Ideally, protect the magnolia from sunburn with a shade net or parasol (but not if it's a tree.) Until it's green again. agricultural expert gabriele

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This answer was helpful for 3 people

it could be a ferric chlorosis (iron deficiency), and the causes can be the most varied.
The cure is the administration of chelated iron (SEQUESTRENE), I would do a shock treatment: 40 gr. at the base of the plant, moving the soil and burying it, then water after 3 days you give it by foliar, 10 gr. for 10 l. of water, well mixed and diluted, the best thing is to dissolve for example in a 1 l plastic bottle. the 10 gr. with 1/2 l. of water, shake the bottle very well, when it is well dissolved pour the mixture into the sprayer, add the remaining 9.5 liters, spray it IN THE EVENING on the plant, wetting all the leaves well.This treatment can be repeated after about twenty days, while the radical nourishment can be repeated after 10 days.
To recap: day 1: at the root - day 4: at the leaves - day 10: at the root day 20: root day 24: leaves, day 30: root Day.) Clear? In a month you would consume 140 gr. of seizures, they sell it in boxes of 1 kg so you have some leftovers (keep in a cool place!)
Do not miss the water. Ideally, protect the magnolia from sunburn with a shade net or parasol (but not if it's a tree.) Until it's green again.

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This answer was helpful for 1 people

Hello, the problems can be different, without photos and without a global view of the plant and its location, it is not possible to understand or make a diagnosis.
However, keep in mind that many plant diseases are physiological, we are not dealing with an orchard, where there is a need to have a good product to make an income.
There are few pathogenic infestations that can kill a plant and most of the time it comes too late.
There are many aesthetic pathologies.
It is always nature, and the plant has its natural defenses.
It will certainly solve it, but I advise you to call and view the tree as a whole, by a specialized and honest technician.
Sincerely
Agr.Andrea Albertazzi

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This answer was helpful for 2 people

Hello, without photos it is extremely difficult to make a diagnosis. You speak of September 2013 and in that period it did not rain excessively. The damage, as well as due to a pathogenic fungus, could also be due to external causes. I have often seen leaf malformations due to hormonal herbicides used nearby. Due to the heat, clouds of vapors can rise which, hitting the aerial part of the plants, can cause damage of this type. Show the leaves, the whole plant better to a person expert in your area. Please, let's stop drastically pruning the plants, thinking about strengthening them. We get the completely opposite effect. Trust in experienced people, since you also have an emotional bond with the plant. It will be money well spent, were it not already too late.

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Habitat Nature

This answer was helpful for 1 people

It is necessary to evaluate whether the problem depends on physiological or pathological causes.
It could be caused by fungal disease and if there is no presence of spots and only curling it could be powdery mildew or be of a climatic nature considering also any damage from excess heat, lack of water or even excess.
Without seeing and ascertaining certain conditions it is difficult to establish it. In any case, I recommend that the pruning be followed by spraying with copper which has a disinfectant function.

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This answer was helpful for 2 people

Hi, the curled leaf is usually the signal of a fungal attack, if then a white patina also appears on the leaf plate, you could be almost certain that you are in front of powdery mildew (also called bad white). Excessive pruning as well as not serving to solve the problem could even accentuate it creating other problems. We recommend viewing it to an expert to plan phytosanitary interventions.

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Gerosa Gardens

This answer was helpful for 1 people

Treat with systemic fungicide.

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This answer was helpful for 1 people

Hello Mr. Mattia,
The ideal would be for him to send us some photos to be able to make a precise diagnosis.
From your description, I think it is a fungal attack that causes deformation of the leaves. He could have a broad-spectrum fungicide treatment carried out (that is, which fights different types of fungi), he will see that the plant will benefit in a short time, the new leaves will see them grow healthy. But then again, the vision of the leaves is essential. I also invite you not to drastically prune the plants, wild pruning does not solve these pathologies, let us be assisted by professionals. Furthermore, in some places, such as in the Lombardy region, there are laws that sanction the owners and operators who pollard the plants. Topping means the pruning of trunks / branches with a diameter greater than 10 cm. Exempt from the sanction only by requesting authorization from the competent municipality, which will assess the motivation for topping.
Thank you for contacting us
with regard

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Infinity Green - the infinite green

This answer was helpful for 3 people

Hi Mattia, the problem this year is the incessant rains, which make some microelements unavailable, and with the heat they greatly favor fungal attacks, but without being able to see the plant it is difficult to make a diagnosis. I recommend that you remove a curled leaf from the magnolia in question and take it to the nearest agricultural pharmacy, they will surely recommend iron chelate, humic acids for deficiency and a fungicide for disease.
Kind regards from Lello Dicarlo of Agrigardensud

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Agrigardensud Cooperative Society

This answer was helpful for 1 people

Good morning Mattia,
leaf curl could be caused by a fungal infection (for example, powdery mildew frequently causes malformations to young shoots on which a white patina can subsequently form which corresponds to the mycelium of the fungus). To make a precise diagnosis you should see the plant, or at least some photographs of the symptoms. If it is a fungal disease, it appears every year when the environmental conditions are favorable and the pruning of the plant has no effect. Indeed, a drastic pruning is always to be avoided. It is sufficient to carry out phytosanitary treatments with the right products and times (which must be defined only following an appropriate diagnosis).

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Studio arbora

This answer was helpful for 1 people

It could be a fungal disease, however you can try to treat it with a white summer oil together with a fungicide, and in addition to that of fosetyl aluminum both at the root and on the plant itself.

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Passalacqua Brothers #Giardini D'Autore

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Reasons for the magnolia tree with yellowing leaves

If you see yellow magnolia leaves on the tree in your garden, don't panic. It might not be very serious. In fact, it might be natural. Magnolias shed their old leaves all year round - it's part of their growth cycle, and those older magnolia leaves turn yellow and fall to the ground. Watch carefully to determine if new leaves are growing to replace those yellow magnolia leaves. If so, you can relax. If not, continue troubleshooting.

Another reason you might have a magnolia tree with yellowing leaves is the acidity of the soil, or the lack of it. Magnolias do best when the soil is neutral or slightly acidic. Purchase a soil pH tester at your garden store. If the soil is alkaline (with a high pH), it is recommended to consider a transplant to another place or an amendment of the soil to increase acidity.

Poor watering is another reason why you may have magnolia leaves turning yellow and brown. Too little water can cause drought stress, which results in yellowing leaves on magnolia. Too much water, or soil that doesn't drain well, can drown tree roots. This can also cause yellow magnolia leaves.

Yellow magnolia leaves can also be a symptom of sunburn or insufficient light. Assess the location of the tree and figure out if sunlight could be a problem. Generally, trees prefer a growing site that gets good light.

Sometimes an iron or other nutrient deficiency can cause yellowing of leaves on magnolia. Do a comprehensive nutrient test on your soil and find out what the tree is missing. Buy and apply a fertilizer that delivers the missing nutrient.


Three curiosities about magnolia

The most common species of this plant are characterized by white and pink flowers. In the language of flowers these two colors represent the purity and the modesty: this is why giving a magnolia as a gift means considering the other person persevering and dignified.

There magnolia bark it is used in natural aesthetic medicine for the creation of beauty masks. The fragility of the shrub hides purifying powers the particular fragrance, on the other hand, is an excellent solution to carve out a moment of relaxation.

In Georgia they have been discovered archaeological finds of this plant: until a few decades ago, it was traditional to plant a magnolia tree in every private flowerbed, with the belief that it carried luck is economic security.

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