In the spring on the site, many summer residents with annoyance find yellowed leaves of garlic planting. And this is not only an unpleasant effect, but also a sign that the agricultural technology of growing winter garlic is broken. After all, following the yellowing of the leaves, the plant stops growing at all, and the cloves rot. Why the winter garlic turns yellow in the spring and what to do, we consider in this article.
- Low spring temperature
- Low soil acidity for growing
- Nitrogen deficiency
- Insufficient watering plants
- Lack of potassium
- Diseases of winter garlic and yellowing of leaves
- Major plant pests
Low spring temperature
First of all, the leaves of winter garlic turn yellow in spring due to the low temperature. And this is the main reason.
The snow no longer covers the plant, and it becomes vulnerable - the roots weaken, and the energy for development is taken from the leaves. 
Basically, a deep landing leads to freezing of garlic. Therefore, in order to avoid the appearance of yellow leaves, plant this crop preferably at depth 5-7 cm And to prevent the appearance of yellowness in the spring, you can cover the young saplings with a film.
Low soil acidity for growing
In order for the garlic to be pleased with its harvest, it should be planted in neutral soil. If the land on your site is characterized by high acidity, it should be lowered. To do this, in the autumn digging in the soil add lime. 
With increased acidity, the rate of lime per hundred parts - 50-70 kg, for acidic - 35-45 kg, for weak acid - 30-35 kg. After making lime site must be carefully dig.
Nitrogen deficiency
Lack of certain nutrients, including nitrogen, is also a cause of yellowing of the foliage and the appearance of a reddish tint. 
If you notice that the tips of the leaves turn yellow in winter garlic, the first thing to do is to urgently fertilize the soil with manure or urea (urea).In this case, the urea is recommended to water the plant right through the leaves.
Insufficient watering plants
Garlic plantings like moisture, so the soil should be loose and well hydrated - so it is enriched with oxygen.
Watering is particularly relevant at the beginning of the growing season. 
It would be nice to use highly effective additives that help loosen the earth and structure it, increasing the degree of absorption of moisture and nutrients.
Lack of potassium
A potassium deficiency can also harm a young plant. In most cases, yellowing leaves for this reason is observed in cold spring. 
The roots in this case do not receive enough nutrition from the soil and begin to take potassium from the leaves. Potassium deficiency can also be determined by the uneven growth of leaflets, they droop and become thin.
Diseases of winter garlic and yellowing of leaves
The most common diseases accompanied by yellowing of garlic leaves, are:
- White rot. The leaves of the plant first turn yellow and wither, the bulbs are covered with mold and rot. Plants are dying one after another, and on their surface a fluffy whitish plaque is seen. Most often the disease occurs in the spring, with a nitrogen deficiency.
- Basal rot. Although this type of fungus is present in almost all soils and does not cause any problems if the plants do not survive stress. Manifested by yellowing of the leaves, which moves down. In principle, the symptoms do not differ from white rot, only the plant rots more slowly. It is necessary to combat this nuisance in advance by treating the planting material with a disinfecting solution (for example, "Thiram").
- Aspergillosis or black mold. Perhaps the most dangerous disease that often affects an immature plant.Symptoms - the bulbs become soft, the leaves turn yellow.
- Fusarium The source of this disease is excess moisture. The leaves begin to turn yellow from above already in the process of ripening. This disease is characterized by brown stripes on the stems. If winter garlic turns yellow due to Fusarium, the first thing a plant should be treated with is solution potassium permanganate.
- Penicillus or blue mold. It affects mainly the plant after harvesting as a result of careless handling. Garlic gradually turns yellow and dies.
- Rust. Loves high humidity. It appears yellowish spots and specks on the leaves. Over time, the foliage turns orange and brown. Fighting method - processing cloves before landing.
Garlic often turns yellow from fungal diseases. Of course, Fusarium and Bacterial Rot are easier to prevent than to cure.Therefore, before planting, the teeth of a plant should preferably be disinfected with a weak solution of potassium permanganate or with “Maxim” and “Fitosporin” preparations, filling the planting material with a solution for 15-30 minutes. Even if you did not do this before planting, you can pour on the beds with the solution.
For prophylaxis, it is also possible to disinfect the soil by treating it with a solution of copper sulfate (copper sulfate) or saline. At the first signs of damage to the plant, it is urgently necessary to process garlic plantings with fungicides or similar preparations.
Major plant pests
Garlic landings may be attacked harmful insects:
- onion flies;
- onion tick;
- onion covert;
- stem nematode worms;
- onion moth;
- tobacco thrips;
- root tick.
Various drugs will help to cope with such a nuisance. Their composition will deter pests and stop their spread.From onion flies and other pests, dusting wet leaves with a mixture of wood (vegetable) ash and tobacco dust helps.
