Irises, or as they are called by the people, cockerels are the beloved flowers that grow in almost every gardener’s garden. But in order for bright petals to please the eye, you need to follow some rules of their content. About what to do if the irises stopped blooming, read below.
- Lighting
- Location selection
- Varietal errors
- Wrong wintering
- Recessed root
- Lack of space
- Diseases
- Feed errors
Lighting
Proper lighting is a basic requirement for successful flower growth. You need to know that irises are light-loving plants. This means that when choosing a landing site, it is necessary to consider how long it has been in the light, and whether a nearby object will not create a shadow.
Due to the lack of light, the irises will not stop growing, but this may be the reason why they do not bloom. Very often, diseases such as leaf rust or powdery mildew develop in the shade. 
To avoid such problems, choose a territory for flowers that will be well lit, at least, only in the first half of the day.
Also consider the fact that the irises quickly grow.Leave some space around them and make sure that it is also well clarified.
Location selection
In addition to illumination, other factors should influence the choice of location. First of all, landing area must be prepared in advance. To do this, make sure that:
- All weeds have been removed.
- The soil was dug up.
- The soil was fertilized.
It is worth digging up the earth by about 25-30 cm. You can choose any fertilizer. Cured manure works well. Fill it before planting and allow time to digest the ground.
Often for a bed of irises choose elevated places, about 20-30 cm. It is necessary to make a small bias towards the south side. This way you will ensure the outflow of excess moisture that the plant does not tolerate. 
Pay attention that the landing site is not too windy. The plant does not like drafts.
Varietal errors
The perennial plant belongs to the Iris family, which has more than 800 species with a huge variety of colors and shapes. All of them are distinguished not only by external characteristics, but also by conditions of detention.
Incorrect determination of the type of iris or non-compliance with the rules of content explains why the iris does not bloom. Among the most common species is bearded iris. These are the so-called cockerels, known to each of us since childhood. 
They, for example, do not like to be in acidic soil type. But the Siberian irises perceive only this type. It is necessary to take into account all these nuances and be sure to pay attention to the variety that you planted.
Wrong wintering
Some plant species can tolerate the cold season, but most still do not tolerate frost freezing. Kidneys suffer most from frost.
To avoid problems, you need to do shelter. It is important to choose the right time for this procedure: too early shelter will lead to undesirable debate, and too late - to the fact that the plant does not bloom in spring.
To do this correctly, wait for the fall (when the temperature drops to about + 5 ° C). Cut the irises and cover them with earth by about 20 cm. Instead of soil, you can take humus.
Recessed root
The root recessed into the ground, when literally one leaves and flowers are seen - the answer to the question of why the irises do not bloom. This is a common mistake of novice gardeners, which does not allow the plant to warm enough in the sun. Such a concept would be correct: one third of the root collar should be on the air, the rest should be underground. If this does not happen, the irises will continue to grow, but the flowering process will slow down.
Lack of space
It has already been mentioned above that flowers are rapidly occupying the territory, which is located near the place where they were originally planted.
If nothing is done, then in a few years the flowers will grow so large that there simply will not be room for them, and this will lead to a slowdown or no flowering.
The solution to this problem will be the division of the bush. It is recommended to carry out this procedure every 4-5 years.
Diseases
The question often arises as to why irises do not grow after transplantation. Perhaps this is due to the fact that they have adopted the disease from neighboring plants.Most often the bushes suffer from a variety of pests.
In order to avoid problems, you need to carry out prevention. It is better to do this when the sheet reaches 10 cm in length. For spraying, you can use universal types of poisons. 
In spring, the flowers most often hit the caterpillars. Granozan can be used to prevent their attacks. In summer, slugs appear. You can easily get rid of them by sprinkling superphosphate on the ground.
Also one of the causes of poor flowering can be root rot disease. If irises get infected with them, then the number of leaves may decrease (from 10 to 3-4), while the diseased plants will not produce flowers.
In this case, you need to inspect the rhizomes and remove the diseased areas. After that, it is necessary to treat the remaining root system with a solution of potassium permanganate. After that, experts recommend lubricating Novikov fluid.
Before you re-plant the plant, put the rhizome in the sun.This action will help kill all pathogens of rot, and thus prevent the recurrence of the disease. 
Feed errors
It is important to know the period when fertilizer safe for plants should occur: this can be done after the topsoil has dried out.
If you are well prepared territory before planted a plant, then it may not need additional feeding.
When there is an active growth of new shoots, as well as the laying of flower buds, the plant needs additional energy. At this moment it is necessary to produce dressing.
If the iris lacks nutrients during this period, then next year the flowers may not appear. If the plant is in a sandy soil type, it is recommended to fertilize it with phosphorus, potassium and nitrogen. 15 g per square meter.
When buying a fertilizer for the land, pay attention to what kind of iris it is intended for. 
