When to transplant irises in autumn

The days when irises were randomly planted throughout the garden in small heaps or flower beds are long gone. Now some growers not only try to grow as many varieties of these flowers as possible, but also carefully plan their site in accordance with the flowering time, plant height, and care rules. All these factors are taken into account when drawing up a variety of flower arrangements, alpine slides and landscape decoration. Iris is the best suited for this purpose. Perhaps that is why it is often chosen as a component for decorating spring-summer flower beds and flower beds. And for good reason. Despite the fact that it blooms for a short time, but unlike many flowers of its extraordinary shape, the leaves perfectly retain their green, saturated color until autumn. Timely transplanting of irises in the fall is the key to beautifully decorated flower beds.

Another advantage of these garden flowers is a wide range of colors, from snow-white to dark brown. Their aroma is also varied: from delicate caramel with vanilla to chocolate. And despite the unpretentiousness of this flower in care, it is still necessary to transplant irises. Moreover, transplanting irises in the fall is the most prosperous period.

Why is it necessary to transplant irises in autumn?

The opinions of flower growers regarding the timing of transplanting irises differ. Someone advises to plant plants in the spring, someone prefers to do it in the summer. More experienced flower lovers advocate transplanting irises in the fall. And they confirm their convictions with well-reasoned arguments.

  • By planting in early fall, you give them the time they need to root. When transplanting in the spring, you deprive them of this time, which immediately affects flowering.
  • With the arrival of spring, insects become active and actively reproduce. Many of them can cause irreparable harm to newly planted flowers. Indeed, immediately after transplantation, irises are most vulnerable. And in the fall, the number of pests is significantly reduced. Therefore, plants are also at lower risk.
  • There is a lot of hassle on the personal plot with the onset of spring. Transplanting irises in the fall will free up your precious time. It is important to choose the right time to plant the irises without haste. And with the onset of warm spring days, you will only admire your favorite flowers.

Features of the growing season of irises

Annual transplanting of irises in the fall is not required, but once every 3-4 years it is necessary to plant the plant in order to rid it of old roots. New roots will grow quickly. Without a transplant, they cease to bloom violently already in the 5th year. This is especially important for varietal flowers.

Irises bloom from the second half of May to the end of June, depending on the variety and regional affiliation. But with the end of flowering, their growing season does not end.

The growing season of irises throughout the year is divided into several stages:

  • With the onset of spring, as soon as the snow melts, they rapidly build up the aerial part of the plant. Judge for yourself, in just a month and a half, from the first shoots, they turn into lush green bushes and the first buds appear on them. It is for this reason that many flower growers advise against transplanting irises in the spring. Indeed, for rapid growth during this period, they need a well-rooted underground part of the plant. Planting irises in autumn is more preferable.
  • At the end of the flowering phase in early July, the active development of the root system begins. During this period, new links are formed, on which young buds will appear by autumn. They will bloom next spring. Therefore, if you decide to transplant irises, it is important to catch the moment when the new links have grown, but there are no buds yet. Summer iris transplantation is dangerous in that the newly formed delicate buds can be easily damaged. Despite numerous tips, it is still not worth making a transplant until mid-August.
  • By the second half of August, the root system of irises ends the phase of active development. Young buds formed on the links have grown stronger and are perfectly visible to the naked eye. This factor is of no small importance when dividing a large bush into several small ones. From now until mid-October is the ideal time to transplant and plant irises in the fall.

It's no secret that irises bloom magnificently if ideal conditions are created for them and the root system is well developed. Since the flowering period begins at the end of spring, it is quite natural that they need to create such conditions in the fall so that by this time the roots are strong and well rooted.

Comment! Delenka, fan, layering, scapula - this is how the iris planting unit is called. This is a single link of the rhizome, the length of which is 3 - 5 cm, and the diameter is 1 - 2 cm.

If you decide to transplant irises in the spring, then most of the time and effort of the plant will be spent on strengthening and rooting the root system. It's useless to wait for flowers this year.

Subject to the terms and rules for transplanting irises in the fall, in one season a bush will grow from a small seedling, which next year will give good links that can later be planted.

Some features of irises

Knowing some of the preferences of these plants will make it easy to grow.

  • Irises are very demanding on such indicators as soil moisture. Therefore, too frequent watering or groundwater located close to the surface can cause root rot. To prevent this from happening, flower growers are advised to raise the bed for planting 10-15 cm above ground level.
  • Irises do not like watering too often: it is enough to water them 2-3 times a week in dry weather. The rest of the time, you need to focus on the condition of the soil at the base of the aboveground part of the plant. If the ground is dry, then the flowers require moisture. And if the soil is moist and soft, then watering is not required.
  • The roots are always located closer to the surface of the earth. This feature must be taken into account when planting and caring for irises. Weeds must be removed manually in a timely manner. You can damage the roots with a chopper or flat cutter.

When and how to transplant irises correctly, you can learn from the following video:

Preparing the soil for transplanting

Before you start transplanting irises in the fall, you need to choose the right place for the future flower garden. The composition of the soil, groundwater, illumination strongly affect even such picky flowers.

Irises are very fond of sunlight. Especially in the first half of the day, the maximum amount of sun should fall on the flower bed. Remember where the snow melts fastest in the spring. There you need to plant irises in the fall. It will be the perfect spot for an iris paradise.

It is advisable that strong winds also bypass the place for transplanting irises.

Unlike other garden flowers, irises like loamy, slightly acidic soil. If the ground is too dense and heavy, sand should be sprinkled over the surface before digging. If the soil is light and sandy, add a little clay. You can add a small amount of well-rotted humus and ash to the soil, provided that the soil is too acidic. It will be useful to add potash fertilizers and superphosphates to the soil before replanting irises in the fall.

Important! Fertilizers containing nitrogen stimulate the rapid growth of green mass.Therefore, it is advisable to feed the flowers with them in early spring before the onset of the budding phase.

Growth stimulants when transplanting irises in autumn or spring are not recommended to be introduced into the ground. In the fall, they will not allow the roots to fully prepare for the onset of winter. And in the spring, the root system, giving all its strength to the leaves, will become weak and defenseless.

It is advisable to complete all preparatory work approximately 7 - 10 days before the start of transplanting irises in the fall. In order for the soil to compact and take on the desired consistency, the area intended for planting needs to be watered abundantly 3-4 times. During this period, the loosened and fertilized soil will compact and settle. Now you can plant irises in the prepared area.

Preparation of planting material

When planning planting works, flower growers are guided not only by such a factor as the season. The main signal when you need to transplant irises in the fall, so that they better take root and take root, is the state of the foliage. As soon as the tops of the leaves begin to turn yellow, you must immediately start transplanting.

Advice! In order not to confuse the planted irises, you can inscribe the variety name with a marker on the rest of the sheet.

An iris bush that needs an emergency transplant, it is advisable not to water or fertilize 2 - 3 weeks before planting. It is necessary to remove the rhizome from the soil only with a pitchfork and with great care. To do this, stepping back from the base by 20 - 25 cm, you must first dig in the iris around the perimeter. And then carefully remove the roots from the ground. After shaking off the rest of the soil, dry the planting material well. After drying, you can start dividing the main iris bush into small divisions.

At this stage, it is important to know how to properly separate small layers. It is highly undesirable to divide the bush for subsequent planting by hand, without special tools. So, you can not only break the roots into links incorrectly, but also damage most of the young buds. All seed will be hopelessly spoiled and unusable. Separation must be done with a sharp, clean knife. When cutting, it is important to pay attention to at least one “fan”, several young buds and a piece of root up to 10 cm long on each separated root. The cut site should be immediately treated with ash, thus carrying out a kind of disinfection.

Too long side roots of irises need to be trimmed. Their length should be between 5 and 10 cm. Longer absorbent roots will interfere with transplanting irises.

Before planting the seed in the fall in the prepared soil, it should be treated with potassium permanganate (light pink solution) or fugicide. In potassium permanganate, the roots are kept for about 20 - 30 minutes, in a disinfecting solution - according to the instructions on the package.

Important! Recently acquired rhizomes are also subject to compulsory drying and disinfection. Even if they were bought by you in specialized stores or were delivered by mail.

Iris leaves should be cut by 2/3. The shape of the cut should resemble the roof of a house. It is undesirable to completely cut off the leaves, since the process of photosynthesis takes place in them until the very frost. Irises of different varieties should be marked or signed.

Transplanting irises in autumn

The process of planting irises in autumn is very simple and consists of only three stages. The main thing is to have the desire and a small section of pre-prepared soil. It is advisable to plant flowers in dry weather.

  • The planting hole for irises should not exceed 10-12 cm in depth. In the middle of the groove, you need to form a small mound, 2-3 cm high.
  • A trimmed cut is placed on it. It is important that the absorbent roots descend along the mound to the bottom of the planting pit. Spread out all the roots gently. Do not allow them to bend.
  • And the last thing - cover the roots with earth. At the same time, keep in mind that when watering, the soil will settle by 1-2 cm. The root collar and a small part of the main root after shrinkage should be located above the ground.

Autumn work on transplanting irises ends as usual - with moderate watering.

As you can see, there is nothing difficult in transplanting irises in the fall. Most importantly, follow the plants for two weeks after the end of planting work. Each planted division should stand strictly upright, not leaning to the side.

The distance between planted flowers can vary from 10 cm to 35 cm. Why is there such a difference? When determining the distance you need, you need to consider:

  • Plant variety.
  • The height of the flowers. Low-growing varieties can be planted closer to each other, tall ones - as far as possible.
  • The frequency of transfers. If within 3 - 5 years transplanting irises is not included in your plans, then it is advisable to increase the distance between the divisions.

The author of the video will tell you about the basic rules of planting and caring for irises for novice gardeners:

Care for irises after autumn planting

Provided that the autumn is warm and does not indulge in heavy rains, the planted irises should be watered after three to four days.

Caring for irises after planting in early autumn consists in weeding in time. It is important to consider that the roots are shallow, and in order not to hurt them, it is better to remove the weeds by hand.

After transplanting irises in the fall, it is important to keep an eye on the declining air temperature. When frost approaches, it is advisable to mulch them with dry leaves, peat or spruce branches. In the Siberian region, mulching is mandatory. As soon as possible, as soon as the snow melts and there is no threat of severe morning frosts, the mulching layer must be removed. More care for irises in the fall after transplanting is not required. Mother Nature will do the rest. The first rays of spring will warm the roots and soon the first green arrows will appear on your site.

Important! When replanting irises, the soil should not be fertilized with manure. Not only do they dislike this type of fertilizer, there is a high probability of burning the root system and root collar.

Subject to the simple rules of planting and leaving, irises are gaining color in the spring. During the summer, they build up an excellent root system. But you can divide and plant the root only in the second year after planting.

Despite the fact that irises are unpretentious in maintenance, they should still be replanted every 3-5 years. Thus, you will save them from the degeneration of varietal traits. Moreover, adherence to planting dates will keep the root system in excellent condition. And thanks to her, at the end of spring, irises will delight you with lush flowering and delicate aroma.


As you can see, it is not difficult to care for irises in autumn. Perhaps it is for this reason that they can very often be found on flower beds near kindergartens and schools. After all, blooming irises are often associated with the last bell and the beginning of summer holidays.

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