Oleander roots

Oleander roots

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Question: oleander roots

In the hole that had contained an oleander, so with a lot of toxic residue of oleander roots, can I plant a lemon plant? or do I run the risk that the production of lemons is toxic in turn?

Oleander Roots: Answer: Oleander Roots

Hello Piero and welcome to the expert column of our website. The oleander (Nerium oleander) is a beautiful plant widespread in the Mediterranean environment. Particularly rustic, it is an evergreen shrub that grows quickly and is often used to delimit roads, roundabouts and boundary railings. Summer-autumn flowering species, it does not fear drought and has no needs as regards the type of soil as long as the cultivation area is not excessively humid and subject to water stagnation.

In addition to being famous for its qualities as an ornamental plant, the oleander has been known since ancient times for its toxic properties. In fact, every part of the plant (even the seeds) if ingested in large quantities can cause serious reactions in the organism.

As for your question or whether or not the toxic residues of the oleander in a hole can also poison the production of lemons originating from the plant subsequently planted in that hole, we would like to exclude this hypothesis a priori. The toxicity of the oleander is due to the alkaloids that the plant produces that can be framed as a sort of defensive strategy that it uses against herbivorous animals. The lemon is not able for genetic reasons to synthesize a substance similar to that produced by the oleander and furthermore the residues that the oleander will leave in the hole will undergo decomposition over time.

The lemon, for its part, has used a different self-protection strategy than the oleander, namely that of having branches with thorns able to dissuade herbivores from intending to eat this plant.

The magic of an oleander hedge, an ornamental plant with beautiful flowers

L'oleander it is a common ornamental hedge in our country. We are used to seeing the classic oleander hedge in its full bloom in the summer in holiday resorts adorning streets and villas. It is a beautiful, resistant and easy to care plant but did you know that it is a very poisonous plant?

Some precautions for its cultivation

The oleander, capable of developing from a semi-woody cutting, is able to multiply and reach a height of 3 or 4 meters even with little water available. The only necessary precautions are related to its alkaloid content which can be poisonous, especially for animals. It is therefore necessary to be extremely careful in handling it, always using gloves and washing your hands. Even the burning of the remains of the pruning, which fumes are dangerous. Precisely because it is dangerous, it is always better to rely on an expert gardener and thus avoid unpleasant situations. You can request a quote conveniently from our site.

Flowering and cheerful bushes for every garden

The oleander cutting represents the simplest and happiest way to reproduce this plant with ancient origins. According to many, the oleander was born in Asia and in the Mediterranean areas where it thrives in all climatic conditions. The oleanders characterize the landscapes of the seaside places , therefore, in places that are well exposed to the sun and with constant humidity. Yet oleanders are also the plants of the highways where they grace the traffic islands with their lively and showy flowers.

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Oleander: an extraordinary plant with a thousand shades

Oleander for your garden

We conclude our roundup of images with this latest proposal. If you have chosen to grow this plant in your garden, know that it will surely be able to give a lot of color and an intense fragrance. Do not hesitate to view our other articles in the search for the perfect plants for your outdoor.

Without butterflies and without heat seeds

As a second prerequisite for growing richly filled capsules, many hours of sunshine are required at high summer temperatures. After successful fertilization, the pods grown in hops develop from the two carpels. Conversely, only winged seeds actually ripen during a long, sunny summer. As climate change has brought us Mediterranean conditions, so local oleander gardeners can also look forward to their own seed harvest.

Oleander roots - garden

Mace of St. Joseph: from the Apocryphal Gospels according to which the pretenders of the Virgin Mary had to place a rod on the altar that St. Joseph brought, made of oleander, sprouted as soon as it was laid, making the choice fall on him.
Its origins are uncertain, it is believed to be native to Asia and is currently present in the warm temperate belt from Japan to the Mediterranean basin. In our country it is found spontaneously from the coasts (in association with Tamerice, Altano and Vitex Agnus Cactus - Macchia ad oleander and agno chaste) up to inland areas up to about 1000 meters above sea level. Only in Sardinia between the Supramonte di Orgosolo and that of Urzulei can it be found at a higher altitude in association with Vitex Agnus Cactus.
Due to its diffusion, Oleander has been a common plant since the times of time and has always struck the collective imagination. It is often sung in poems (L'Oleandro - D'Annunzio - And who cut off a branch from the oleander? Small pond - Garcia Lorca - I reflected in your eyes thinking of your soul. White oleandro), inserted in songs (Celentano : I am looking for a bit of Africa in the garden, between the oleander and the baobab tree) and became the object of a metaphor for life (In the film The fish in love by Leonardo Pieraccioni).

The plant is toxic to any animal species (it is necessary to avoid even inhaling the smoke produced by the combustion of pruning residues). It causes tachycardia with increased respiratory rate due to the content of oleandrin and nerioside, two cardiac glycosides that are particularly harmful to the respiratory, gastrointestinal and cardiac levels.
In this regard, it is said that some Napoleonic soldiers who used the branches as a spit to roast meat during military campaigns died poisoned and that once the Oleander infusion was used, with often tragic results, in practices abortive.
It also seems fashionable in Sri Lanka to leave home stressed and swallow a yellow oleander seed (Thevetia peruviana). Vandana Shiva, an Indian physicist and economist and one of the leading international experts in social ecology, says that Indian farmers who are unable to meet their debts commit suicide in this way. In fact, a yellow oleander seed is enough to stop the heartbeat.
This negative aspect of the plant was also used in fiction and in various film transpositions. In the film White Oleanden (with Michelle Pfeiffer and Renéè Zellweger) the murder weapon is a poison extracted from the oleander.
Certainly for the above, in the language of flowers the Oleander means mistrust and death and it is not recommended to give it as a gift.

The oleander has a shrubby habit, with generally not very branched stems that start from the stump, first erect, then arched outwards. The young branches are green and hairless. The old stems and branches have a greyish bark.
The leaves are glabrous and leathery, arranged in whorls of 2-3, briefly petiolate, with an entire margin and a robust and prominent central rib. The lamina is lanceolate, acute at the apex, 1-2 cm broad and 10-14 cm long.
The flowers are large and showy, radially symmetrical, arranged in terminal tops. The glass is divided into five lanceolate lobes, pink or white in the spontaneous forms. The corolla is tubular and then divided into 5 lobes, varying in color from white to pink to carmine red. The cultivated varieties are double-flowered. The androecium is made up of 5 stamens, with filaments welded to the corolline tube. 'Ovary is superior, formed by two pluriovular carpels. Flowering is abundant and gradual, it begins in the months of April or May and lasts all summer until autumn.
It is useful to emphasize that while the simple flower falls upon withering, the double flower remains on the plant even after being withered with an aesthetically pleasing effect.
The fruit is a fusiform, narrow and elongated follicle, 10-15 cm long.
Fruit of the Oleander

The seed has a variable size from 3 to 5 mm in length and about 1 mm in diameter and is surmounted by a down arranged like an umbrella (pappus) which allows the seed to be carried by the wind even for long distances.

Since the plant is poisonous in all its parts, we recommend the use of gloves to perform any maintenance work.
GROUND: oleander adapts to both arid and humid soils (but not stagnant) prefers a neutral or subacid pH (pH values ​​from 6.0 to 7.5) takes advantage of good soil fertility but also adapts to soil conditions very poor.
In case of cultivation in pots, choose taller rather than wide containers, because the root system of the oleander develops in depth.

EXPOSURE: oleander gives its best in full sun exposure but can also tolerate moderate shade conditions which, however, cause an excessive appearance of leaves to the detriment of flowering.

ALTITUDE: Minimum altitude: 0 m - Maximum altitude: 300 m

TEMPERATURE: sensitive to cold, they prefer mild climates, requiring a minimum temperature of 5 degrees. In temperate climate zones it can therefore be grown outdoors, without needing any protection. Conversely, in the northern regions it is good to repair it during the winter.

PRUNING: Oleander is a very vigorous plant to contain with an equally vigorous pruning. There are those who recommend pruning in late summer or autumn, but this work can be moved to mid-February to remove the weakest branches, to thin the plant and cut the flower stems of the plant from half to one third of their length. 'previous year, without touching the buds of the year that will surely bear the flowers.

In spring, it is good to give the oleanders a granular fertilizer and adding ox blood from time to time.

Oleander can be multiplied by seed but it is a very long operation as it takes several years before the plant can bloom and you will not be sure that the plant is the same as the "mother" plant. For those wishing to try their hand, it is good that they collect the seeds when the capsule is opened and sow them immediately (at a temperature of about 20 ° C) without any other treatment than the elimination of the pappus (by rubbing).
The best system is reproduction by cuttings and especially by cuttings in water. The cuttings are taken in spring about 10-15 cm long and cut with an oblique cut (in this way you will have a greater surface for rooting) and place them in a glass containing water. When the roots have reached 2.5 cm in length they can be planted in the pot using a soil as indicated for adult plants.
Oleander can also be reproduced by layering, or by transplanting suckers, which oleander produces in abundance. Taken in autumn, after flowering, they will be buried immediately afterwards in fertile and light soil, choosing sunny and sheltered southern exposures. The new specimen will flower after two to three years.

The most common parasite of oleanders is Aspidiotus hederae, a particular type of cochineal, which attacks the underside of the leaf. Another cochineal that invades the plant reproducing practically for the whole year is the Chloropulvinaria floccifera which manages to make the plant perish.
We also remember the leaf spotting (Septoria oleandrina), the anthracnose (Phoma exigua = Ascochyta heteromorpha), the mange (Pseudomonas savastanoi f. Nerii), the drying of the flowers (Fusarium martii), the red spider, the Fumaggine in consequence the presence of aphids that produce honeydew, etc ..

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Being a Mediterranean plant par excellence, the oleander is found in the Italian territory and especially in Europe in general. Suitable for the summer season, it abounds in the wild. Keeping it at home, you can safely leave it on the terrace or in the garden, always taking care not to expose it to excessive heat sources. It has many varieties, among which we remember the dark green leaves, hard and resistant, while the flowers are made up of smooth petals generally of pink, white, apricot or yellow color. Being a plant that adapts perfectly to the situation in which it is placed, it is certainly possible to find the oleander even if it forms sturdy hedges, even up to five meters high.

To multiply an oleander all you have to do is use cuttings of cut branches, obviously in these specific times of the year. It is also better to leave the cuttings in warm water if you want to get roots more easily and quickly. Then remember to use the cuttings that do not give flowers, or those positioned just below the flowering branch, this because in this way they will have more space to open. Use cuttings that have a length of about ten or fifteen centimeters and finally plant them in a pot filled with earth with roots of about three centimeters.

Finally, always referring to the question of the season, keep in mind that if you use cuttings taken at the beginning of spring you can obtain a flowering of your oleander even the same year. As we have seen, the steps to multiply the oleander plant in the end are not only very few, but also extremely simple. It will be enough to remember that this plant, although very adaptable to the territory and to the time, still has its preferences in reference to the temperature and, to the cuttings, as regards multiplication. Good job.

Video: Killing the Oleander