Fall hibiscus flowers

Fall hibiscus flowers

Question: fall hibiscus flowers

Good morning,

about 1 month ago I bought a beautiful red hibiscus, for a couple of days the flowers are still in bud, since it is the first time that I give it to me, what should I do so that it does not remain without a plant ??? thank you, Rossella

Fall Hibiscus Flowers: Answer: Fall Hibiscus Flowers

Dear Rossella good morning and welcome to the questions and answers section of our website. Hibiscus is a beautiful plant that is marketed in numerous varieties. Usually the varieties that we find in nurseries in spring are seedlings or plants that do not exceed 1 meter-1 meter and a half in height even if they are often even smaller (half a meter). These varieties are plants that cannot stand the cold and that for this reason in winter, at least in central-northern Italy, they must be sheltered from low temperatures and frost.

Hibiscus must be grown in a sunny position in the house because it is a plant that loves the sun and it is also a plant that must be watered frequently but strictly waiting for the soil to dry between one irrigation and the next. Exposure and watering could be the causes of the floral abscission that is occurring on your hibiscus plant. A dimly lit position can in fact cause a deficit in the photosynthetic balance and therefore a decrease in the availability of nutrients which is transmitted in a fall in the most "expensive" portions of the plant in terms of energy and nutrients. For this reason the flowers are dropped from the branches, to get rid of a burden that the plant cannot carry on, the burden of reproduction.

Another reason that may have caused your plants to lose their flowers is probably an excess of water during irrigation. When for a shorter or longer period, we supply the hibiscus plants with an excessive amount of water, intense imbalances can be created that lead to a series of bad consequences on the plant, such as the loss of flowers.

We therefore recommend that you adjust these two factors so that the light is not too low and that the watering is not excessive. In addition to these precautions, we also recommend fertilizing your hibiscus plant with liquid fertilizer to be diluted in the irrigation water. Ask your trusted nurseryman or your gardener for fertilizers which, in addition to containing macro elements such as nitrogen, phosphorus, potassium, calcium and magnesium, also contain micro elements such as phosphorus, copper, manganese and molybdenum.

The hibiscus plant. Here's how to grow it

There hibiscus plant it is very popular for growing in the garden or in pots in the apartment. There are about 300 species of Hibiscus, a genus of plants belonging to the family of Malvaceae. The beauty of this plant is contained in its splendid flowers, which come in a wide range of colors, accompanied by glossy green leaves.
In nature, hibiscus can take on the appearance of a small shrub or a sapling. When grown in our latitudes, however, the plant behaves like a perennial herb, with smaller dimensions.
Its flowers are not only beautiful, but rich in properties. They are also known as karkadé flowers, and are excellent for preparing excellent herbal teas.

But let's see which hibiscus species are most sought after by gardeners and the correct cultivation techniques.

Species and characteristics

L'Hibiscus is a genus of plants belonging to the family of Malvaceae, which as I told you includes many species, it seems about 240, which for convenience we all tend to call hibiscus. Almost all are united by the flowers produced, colorful and large.

Asia Minor is the homeland of the hibiscus, which can also be reached in this area a height of 3-4 meters. In Europe and America, where it was introduced later, the plant usually grows up to a maximum of 2 meters. Under the genus Hibiscus we find not only herbaceous plants, but also shrubs or bushes, most of which, however, have in common the bark gray and the leaves dark green ovals, as well as flowers that can be white, red, pink, orange or purple.

The existing hibiscus species, therefore, are really many, but we can at least mention the best known ones:

  • Hibiscus syriacus: it is the most widespread species in Italy, where it is cultivated for ornamental purposes, and despite its scientific name it does not come from Syria but from the Far East, so much so that it is also called Chinese hibiscus. Some varieties of this species are also used to form one hedge which fills with color during flowering.
  • Hibiscus rosa-sinensis: another species from the East, which is why it is also known as pink hibiscus of China, includes under it even a thousand variety, including hybrids. It stands out above all for its size, which can lead it to reach up to 8 meters in height and produce flowers with a diameter of 15 centimeters.
  • Hibiscus moschetous: also called water hibiscus, it is native to Asia and the United States and is particularly suitable for an ornamental pond, although it can also be grown in the garden or in pots. As usual, it produces rather large and colorful funnel-shaped flowers.
  • Hibiscus trionum: the flowers of this species, also known as vesicose hibiscus, have a typical yellow or cream color. It has a bushy habit and therefore a lower height than other similar ones, at most one meter.
  • Hibiscus militaris or H. Laevis: native to North America, it is a species that blooms in midsummer, until autumn, with colors ranging from pink to bright red.
  • Hibiscus mutabilis: it is an evergreen plant that, as you can perhaps guess from the name, has the particular characteristic of giving different colors over time, producing flowers with increasingly darker shades, as if a sort of moulting took place.
  • Giant hibiscus: cultivated for ornamental purposes, this species is appreciated above all for its particularly large flowers, which even reach 25-30 centimeters in diameter.

Regardless of the species chosen, if you can guarantee it a mild climate, protecting it in the coldest periods, hibiscus will be quite easy to grow, given that it is a resistant and versatile plant, suitable for growing both in full ground that in pot, if you want to grow it at home or on the balcony. So let's see step by step all the fundamental stages for cultivation.

An example of a yellow and red flower produced by a Hibiscus syriacus.

Other factors that lead to hibiscus flower bloom

The hibiscus flower and bud drop can also be the result of a number of other factors, such as nutritional deficiencies and environmental conditions. The bud drop on hibiscus flowers is often associated with an underlying problem that can be easily corrected. For example, insufficient watering, excessive temperature changes, and over-fertilizing can trigger the fall of blooms on hibiscus trees. Hibiscus flowers require a lot of light, high humidity, and moist soil. They also need regular feeding with fertilizer as directed.

The best way to keep hibiscus flowers healthy is to meet their needs and check the plants often for signs of problems.

Abandonment of blooms on the hibiscus tree

One of the most common causes of hibiscus flowers falling off plants is insect pests, especially thrips. These tiny insects feed on hibiscus flower buds, dropping them before flowering. Using an organic insecticide once a week as directed should help solve the problem.

Gallis is another common pest that affects hibiscus flowers. This insect lays its eggs inside the buds, turns them yellow and eventually drops them. These too must be controlled with an insecticide suitable for these pests. To find out if colony is to blame when hibiscus sprouts aren't blooming, examine fallen sprouts for signs of gnat larvae by cutting or peeling them off. It will also help pick out any yellow gems and dispose of them promptly.

Other harmful insects that can cause flowers to drop on hibiscus trees include:

  • spider mites
  • mealybugs
  • aphids
  • white flies
  • hibiscus beetle

In addition to insecticidal sprays, placing yellow sticky traps, which they find attractive, near the plant can help catch and eliminate them.

Hibiscus: species and cultivation

The hibiscus, also called by ancient peoples, owes its name at the ibis: it was believed that this bird, native to wetlands as well as many species of hibiscus, fed on the flowers of this plant. Although the misunderstanding has been clarified today, the hibiscus still bears a name similar to that of the bird.

The genre Hibiscus it includes between two hundred and three hundred species of plants, distributed for the most part between Africa and Asia, with about twenty species native to the Indian continent, six of European distribution and some New Zealand and Australian species.

Also in the Italian flora there are three species of hibiscus, which certainly cannot compete in beauty and majesty with their exotic cousins, but which should still be valued more in our own gardens.

The three species of Italian hibiscus

Hibiscus roseus, a perennial herb that grows along the waterways of the Po Valley, with beautiful soft pink flowers.
Hibiscus trionum, with ivory-white petals outwards with a dark eye inwards. It is native to Middle Eastern countries, from where it then spread almost everywhere in the Mediterranean basin, and is a seasonal growing plant.
Hibiscus pentacarpus, originally from the Pontine marshes. Now almost extinct, it has practically become an El Dorado for plant hunters who scramble to find and photograph such a rare flower. For those interested, it seems that some specimens still grow among the small protected ponds in the dense plain woods of the Circeo Park, south of Rome.

These hibiscus species were already well known to the poet Virgil that, in his work The Bucolics, he mentioned one without specifying which one: probably theHibiscus roseus as his fellow countryman.

The Chinese hibiscus

The first specimens imported into Europe were originating in China: this was the reason why the hibiscus was called "Chinese rose" for many years. European plant growers were literally dazzled by the beauty of these flowers right from the start, and it was in these years that the saying was coined to describe a very beautiful woman: "more beautiful than a Chinese rose", referring obviously to our hibiscus.

The sumptuous exotic hibiscus, magnificent flower that beautiful Hawaiian women use to put in their hair, is close relative of the humble mallow that grows on the edges of dusty roads: a large family, that of the Malvaceae, known since the past for its important healing properties.

From mallow to hibiscus

In our countryside, Malva sylvestris was an effective remedy for many problems, from toothache to respiratory problems up to insect bites while in hot countries other species of Malvaceae, such as Hibiscus manihot(syn. Hibiscus abelmoschus) still find wide applications in folk medicine. It is said that he can cure everything, including anxiety, depression and low sexual appetites.

And it is still one beautiful plant with yellow flowers, almost two meters high, with a curious musky smell, it resists discreetly outdoors even in areas with cold winters, behaving like a perennial (loss of the aerial part in autumn and fast and vigorous revegetation from April onwards).

Karkadè hibiscus

In Italy hibiscus plants are mainly used for decorative purposes in gardens and terraces, however, not everyone knows that the karkadè, a tea and coffee replacement drink, is produced from the flowers of a hibiscus. The species in question is theHibiscus sabdariffa, from which the red colored flower chalices are taken, which are subsequently dried, to then produce the infusion with a characteristic sour taste.

Another species of hibiscus used throughout Asian cuisine is theHibiscus esculentus. His fresh fruits, very similar to the typical "friggitelli" peppers of Campania cuisine, they are collected and eaten fresh or stewed for the preparation of soups.

Finally theHibiscus cannabinus, thanks to the high cellulose content in its drums, it is used by the paper industry.

The exotic hibiscus

But the best known hibiscus, the more loved and the more interesting it remains for the gardener the exotic one, called 'Rose of China': Hibiscus rosa-chinensis, grown mainly as a houseplant or balcony plant.

Only along our southern coasts can this exotic creature survive outdoors all year round, but if you grow it in pot it will give you satisfaction for a long time, growing generously and giving a quantity of colorful flowers, often wider than a hand. They only last for a day or two, but the plant produces them continuously has the advantage of being easily hybridized, and of flowering even when the specimen is still very young.

Therefore, innumerable were born varieties also with double flower, in colors from white to dark red through all shades of yellow, orange and lilac pink, even with showy flames or streaks in the heart of the petals.

Among the countless varieties, it deserves a place on the balcony the 'Jumboliscus' series, a range characterized by vigorous and robust plants that bear very large flowers, lasting for several days, rather than just one as normally happens in hibiscus, in numerous colors from cream to yellow, orange, crimson red, it also includes a cultivar changes color over time, whereby a plant in full bloom continuously presents flowers of different colors.

All other species of Hibiscus (moscheutos, paludosus, mutabilis, trionum etc.) herbaceous or suffruticosis (semi-woody) are unsuitable for pot life.

Syrian hibiscus: only in the garden

IS don't try to grow in pots not even the Syrian hibiscus (Hibiscus syriacus), if not for a maximum of two years: it is a shrub that develops a powerful root system, with taproot roots that go deep, which it can only do in the open ground. In pot, even very large, after the first year the roots must bend, reducing their activity: flowering becomes almost non-existent and if the plant remains in a container it will undergo a progressive deterioration.

Resistant and beautiful, the Syrian hibiscus has the advantage of bloom for a very long time and until the last part of summer, giving large violet-blue, white or pink-red corollas until September. There are also varieties with double or mottled flowers, white with a red throat. Unlike the exotic hibiscus, the Syriac is very resistant to cold and full sun, it is not affected by pollution and it grows rapidly, also reproducing from seed.

It can be grown as a tree with a conical upward crown, or as a hedge: over the years the tangle of the branches becomes impassable, thick with beautiful foliage and with rich flowering up to the base if you regularly practice a shortening pruning in late winter. Organic fertilization and irrigation are recommended for a better yield, but these are very easy and rustic plants, almost self-sufficient. There Drought summer is less severe than spring, when the plant prepares the branches that will give flowers. The cuttings they can be taken before the vegetative restart in spring. Episodes of aphids in spring often clear up on their own.

Hibiscus syriacus it was named after Linnaeus, who, however, got his name wrong since it is not at all a plant native to Syria, but coming from India and China. It is a deciduous hibiscus of great beauty, very versatile, which can be grown as a bush or as a small tree as it reaches four meters in height. It is especially appreciated as it can be grown without problems throughout Italy, thanks to its ability to withstand temperatures even below zero. He also grew up in green England (thus also adapting to decidedly colder climates than ours) where he is literally called "mallow tree”Due to the similarity of its flowers to this herbaceous one.

Exotic hibiscus, to grow in pots

  • Native to the subtropics of China and India, fears the cold, so much so that in Northern Italy in winter it must be hospitalized in a bright room with a temperature included between 12 and 16 ° C, thinning out the waterings. It tolerates heat well, even torrid as long as a minimum of wind, and life in coastal areas.
  • Place it in full sun from March to May and in September-October, in half sun or half shade in the summer months (however, it must not receive the rays of midday). The ideal temperature is between 18 and 25 ° C below 10 ° C, it loses the leaves and resists up to 4-5 ° C above zero.
  • Grow it in a plastic pot (also in terracotta in the South), with a diameter starting from 30 cm per plant 40 cm high, cohabitation is not recommended. Provide him with a substrate consisting of half earth for flowering plants and half soil for acidophilic plants, with the addition of a handful of peat for each optimal pot bottom drainage.
  • It is best to use water decalcified, in a regular and abundant dose from April to September, regular but scarce in the remaining months and only after drying of the substrate. It goes fertilized from May to September with half a dose of an acidophilic product every 15 days. In February-March the branches are shortened by about one third. It multiplies by branch cutting in July. -->
  • The aphids they can attack the shoots and buds in spring if the heat is excessive. The red spider it can affect specimens stored in heated rooms in winter, due to the dryness of the air. There white fly attacks plants stored in winter in too humid and poorly ventilated environments (also pay attention to root rot).
  • Although not a strict acidophile, does not like limestone and it is better to use decalcified water for watering, a substrate partially for acidophilic plants and a fertilizer for this type of plants.
  • When the environment is very hot, both in summer and in winter if the plant was kept indoors with heating, vaporize it every day with descaled water.

(Taken, in part, from "Ibisco, sensual and solar", by L. Lombroso, Gardening July 2007)

Hibiscus Care Outdoors

Hardy hibiscus plants are surprisingly easy to grow as long as they provide well-drained soil and a spot in full sun. The secret to success is enough water to keep the soil evenly moist.

This plant has absolutely no need for fertilizer, but a generic fertilizer will promote vigorous growth and flowering support.

Don't worry if your hardy hibiscus plants die to the ground after a hard frost in the fall. Just cut them to a height of 4 or 5 inches, and then wait for the plants to grow back from their roots in spring once the temperatures start to warm up again.

Don't assume your plants are dead unless they show up with the first hint of spring, as hardy hibiscus typically doesn't appear until May or June - then they quickly bounce back with a mass of flowers all the way to the fall .

Video: How to Prune and Maintain Tropical Hibiscus