Autumn flowering of fruit plants - causes and consequences


In the yard is autumn, which means that nature is getting ready for bed. Foliage flies from the trees. Birds fly south. But what is lilac blooming? Chestnut candles blooming? Flower buds have swollen on the apple tree, thorn bushes are covered in color, Veronica winks 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: after all, everything that is left without explanation leads to anxieties and superstitions. But, in fact, scientists for many years, and not unsuccessfully, have been studying the causes and consequences of such a strange phenomenon. Let's figure it out and we.

Autumn flowering plants.

However, it was noted that autumn flowering of trees and shrubs does not happen on a 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 features of the culture include a short growing season (northern varieties differ in this feature), the plant begins to bloom in autumn due to a long period of heat, especially if there was a significant cooling before.

This often happens with honeysuckle, which has a northern origin. By the end of August, the culture completely ends the period of formation of flowering buds and, if conditions allow, it begins to bloom. Moreover, the warmer, the more intense its flowering.

Autumn flowering turn.

The essence and consequences of autumn bloom

The flower bud in fruit plants forms for almost a year. Depending on the culture and environmental conditions, it is about 300 days, capturing summer, autumn, winter and early spring. However, under certain circumstances - excess nutrition combined with high temperatures during the formation of flowers - this process is accelerated several times 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 bloom is a partial loss of next year's crop. Simply put, what was supposed to bloom in the spring has bloomed before the winter, and new buds in the winter will not have time to form due to inappropriate conditions.

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

What to do with flowers blooming at the wrong time?

Given that perennial crops spend energy on the process, albeit small, but flowering, flower buds preparing to dissolve, when they are detected, must be cut off. Especially if they appeared on young plants.

How to prevent the autumn flowering of garden crops?

Accelerated development of a flower bud occurs mainly in dry summer conditions (stress inhibits the growth processes of shoots and accelerates the development of flower buds of the flower) in combination with subsequent sharp moistening (heavy rainfall or watering) at a suitable temperature regime.

Therefore, timely flowering garden care during the summer and early autumn, such as regular watering and pest control, helps prevent autumn blooms. As well as the choice of varieties corresponding to the climatic zone, the development period of which fits into the conditions of the region.

Autumn violet forest flower.

A little more about untimely flowering

Untimely late spring or summer flowering

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

Flowering of trees and shrubs in unusual late spring terms is not massive and is marked by the dissolution of only a few flowers. It is associated with the late development of individual flower buds as a result of malnutrition, cold autumn, freezing shoots or any other stresses.

Flowering at the end of summer can often be seen on the growth of the current year. It occurs in early 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 a growth and manage to go through the stage of flower bud formation before the start of autumn, which, under favorable conditions, then results in untimely flowering.

Winter flowering

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

Annuals and biennials

What about herbaceous plants? Untimely flowering is characteristic of them. Annuals in warm autumn often bloom due to the awakening of sleeping buds. But perennials bloom after a brief decrease in temperature, managing to undergo spring vernalization in a short time.

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