Autumn Flowering Of Fruit Plants - Causes And Consequences. Photo

Table of contents:

Autumn Flowering Of Fruit Plants - Causes And Consequences. Photo
Autumn Flowering Of Fruit Plants - Causes And Consequences. Photo

Video: Autumn Flowering Of Fruit Plants - Causes And Consequences. Photo

Отличия серверных жестких дисков от десктопных
Video: 4 Reasons Why Your Fruit Tree is Not Producing Fruit 2023, January
Anonim

It's autumn outside, which means that nature is getting ready for sleep. Foliage flies from the trees. Birds fly south. But what is it - lilac blooms? Are the chestnut candles in bloom? Flower buds have swollen on the apple tree, thorn bushes are covered in color, Veronica is winking with blue lights on the lawns?.. Untimely flowering of plants always surprises and raises many questions: why is this happening, what are the consequences, how to deal with it? And sometimes it scares you: after all, everything that remains without explanation leads to anxiety and superstition. But, in fact, scientists have been studying the causes and consequences of such a strange phenomenon for many years, and not without success. Let's figure it out and we.

Autumn flowering plants
Autumn flowering plants

Content:

  • Features and causes of untimely flowering of fruit crops
  • The essence and consequences of autumn bloom
  • What to do with flowers that have blossomed at the wrong time?
  • How to prevent autumn flowering of garden crops?
  • A little more about untimely flowering

Features and causes of untimely flowering of fruit crops

Flowering of plants in autumn, and sometimes in winter, late spring or even late summer, occurs quite often in the temperate climatic zone. In some years it is more widespread, in others it is less noticeable. But it can theoretically be repeated two to four times during the growing season.

At the same time, untimely flowering is more often observed on crops from the Rosaceae family. It includes the stone fruits familiar to all of us - plum, thorn, sweet cherry, cherry, bird cherry; pome fruits - apple, pear, mountain ash, irga, hawthorn; and part of berry crops - blackberries, strawberries and raspberries of one-time fruiting. But it also happens on nut-bearing and ornamental plants, in many species of annuals and on biennial herbaceous plants.

What is the reason for this phenomenon? With many factors at once:

  • A sharp drop between dry and then humid warm weather;
  • Exposure of plants to gases;
  • The degree of intensity of direct solar insolation;
  • A jump in temperatures downward, and then steadily warm weather;
  • Exposure to toxic substances;
  • Severe damage by insects, animals or mechanical fractures.

However, it was noticed that the autumn flowering of trees and shrubs does not occur in cloudy autumn and does not occur later than the initial stage of organic dormancy of the buds.

A separate reason is the variety. If the varietal characteristics of the culture include a short growing season (northern varieties differ in this feature), the plant begins to bloom in the autumn due to a long period of heat, especially if there was a significant cooling before that.

This often happens with honeysuckle, which is of northern origin. By the end of August, the culture completely completes the period of flower bud formation and, if conditions permit, it begins to bloom. Moreover, the warmer, the more intense its flowering.

Autumn flowering blackthorn
Autumn flowering blackthorn

The essence and consequences of autumn bloom

A flower bud in fruit plants is formed for almost a year. Depending on the culture and environmental conditions, this is about 300 days, including summer, autumn, winter and early spring. However, under certain circumstances - excess nutrition in combination with high temperatures during the period of flower formation - this process accelerates significantly and can take only about two months (60 days).

What is the biological significance of this phenomenon is still unknown. However, it is clear that the consequences of autumn flowering are a partial loss of the next year's harvest. Simply put, what should have bloomed in spring faded before winter, and new buds during the winter period will not have time to form due to inappropriate conditions.

In addition, during flowering, plants consume stocks of photosynthetic products, which reduces their winter hardiness and frost resistance. Therefore, it should not be surprising that in severe winters they are damaged by frost.

What to do with flowers that have blossomed at the wrong time?

Considering that perennial crops consume energy on the process, albeit small, but the flowering, preparing for the dissolution of flower buds, if found, must be cut off. Especially if they appeared on young plants.

How to prevent autumn flowering of garden crops?

The accelerated development of flower buds occurs mainly in dry summer conditions (stress suppresses the growth processes of shoots and accelerates the development of flower bud tissues), combined with subsequent sharp moisture (abundant rainfall or watering) at a suitable temperature.

Therefore, timely comprehensive care of the garden during the summer and early autumn - regular watering and pest control allows to prevent autumn flowering. And also the choice of varieties corresponding to the climatic zone, the period of development of which fits into the conditions of the region.

Forest violet autumn flower
Forest violet autumn flower

A little more about untimely flowering

Untimely late spring or summer flowering

It happens that flowering occurs later than the usual spring dates, with a delay from several days to several weeks. And sometimes flowers can be seen on trees in mid to late summer. What is the reason for this phenomenon?

Flowering of trees and shrubs in late spring periods unusual for them is not massive and is marked by the dissolution of only a few flowers. It is connected with the delayed development of individual flower buds as a result of lack of nutrition, cold autumn, freezing of shoots or any other stresses.

Flowering at the end of summer can often be seen on the growths of the current year. It is found on early-growing varieties. It is provoked by an early warm spring in combination with the subsequent sunny, hot summer: trees and shrubs enter the development phase early, quickly form growth and manage to go through the stage of flower bud formation even before the beginning of autumn, which, under favorable conditions, then results in untimely flowering.

Winter bloom

Premature flowering in winter - January, February - can be seen exclusively in the south. In the Caucasus, in the Crimea, during these months, the temperature often jumps to high marks (+ 17 … + 24 ° С) and lasts long enough, awakening the buds to flowering. During such periods, black apricot, almond, cherry plum manage to bloom. But, unfortunately, the returning cold does not give them the opportunity to set fruit.

Annuals and biennials

And what about herbaceous plants? Untimely flowering is also characteristic of them. Annuals in warm autumn often bloom due to the awakening of dormant buds. But perennials bloom after a short-term drop in temperatures, having time to pass vernalization in a short time.

Thus, the process of secondary, or re-flowering, is not so unique or inexplicable. Yes, it surprises every time, and even somewhat alarms. But given that not more than 1% of flower buds usually bloom at the wrong time, it does not bring much damage to the crop or decorative plants. Therefore, you should not be afraid of him. And, if possible, you should help your garden properly prepare for winter.

Popular by topic