What causes yellowing of garlic seedlings? What to do if yellowing occurs in garlic seedlings?

Why does garlic turn yellow for no apparent reason? That's because you're planting it the wrong way. The reason for garlic turning yellow may be due to excessive drought, insufficient fertilizer, or the threat of pests and diseases. Only the right medicine can solve the problem. Let's take a look!

Causes of yellowing of garlic seedlings

Regarding the yellowing phenomenon of garlic seedlings, I think the main reasons are lack of fertilizer, excessive watering, or iron deficiency due to cultivation in saline-alkali land. Therefore, in terms of treatment methods, countermeasures can be implemented according to the above points, which will greatly play a role in preventing and alleviating the yellowing phenomenon of garlic seedlings and ensuring and promoting the healthy growth of seedlings.

What to do if garlic turns yellow during seedling stage

1. Strengthen nutrition:

The garlic seedling stage is the period of differentiation and construction of nutritional organs. At the same time, it is accompanied by independent life and requires more nutrients. If fertilizer is lacking and nutrition cannot keep up, the seedlings will have yellow leaves and dry tips due to malnutrition, affecting normal growth. When yellow leaves appear, nitrogen fertilizers such as urea 5-8 kg/mu should be applied in time, or 0.3-0.5% urea and 0.3% potassium dihydrogen phosphate solution can be sprayed on the leaves to improve the nutritional level of garlic seedlings and alleviate the yellowing leaves of seedlings.

2. Control the amount of watering:

Although garlic cannot lack water during the seedling stage, lack of water and drought will cause the root system to not grow deeply and underdeveloped, unable to absorb water, and the plant growth will be weak. However, excessive watering and excessive moisture accumulation can easily cause root rot or mother petal rot. In particular, garlic planted with mulch has a lower ventilation and moisture dissipation capacity. Excessive watering can easily cause root rot and mother petal rot due to high soil compaction and poor air permeability, resulting in serious yellowing of leaves. Therefore, when watering garlic, you should water it at the right time and in the right amount according to the temperature, soil dryness, and growth conditions of the garlic seedlings to avoid adverse factors caused by excessive watering.

3. Supplement iron:

The yellowing of garlic in the seedling stage may also be a physiological disease caused by iron deficiency. However, iron-deficiency chlorosis is most likely to occur in saline-alkali land. When the garlic seedlings lack iron, they cannot synthesize chlorophyll, photosynthesis will be hindered, and the leaves will show yellowing. This is mainly because the soil is highly salinized, has poor air permeability, weak root absorption capacity, and iron cannot be circulated in time. For the yellowing caused by planting garlic in saline-alkali land, 0.3~0.5% ferrous sulfate solution can be sprayed in the seedling stage, or 3~5 kg of ferrous sulfate can be applied in the furrow with other mixable fertilizers before sowing to prevent and avoid yellowing.

In general, apply enough base fertilizer when planting garlic, till the soil more often during the seedling stage, add fertilizer and water according to the growth of the roots to promote root growth and strengthen the seedlings. Water at the right time and in the right amount, avoiding excessive watering that will cause serious moisture accumulation and poor air permeability, affecting growth. This can prevent and avoid the yellowing of garlic during the seedling stage.

Can garlic be watered in winter?

Can!

However, generally speaking, the water we pour in winter is wintering water. For autumn-sown garlic, in order to better and safely survive the cold winter, it is necessary to water the garlic once. I have said in my previous answers that there are many benefits of wintering water, two of which are very important: First, after watering the garlic, the water fills the gaps in the soil, and because the specific heat capacity of water is relatively large, it can slow down the rapid drop in soil temperature and cause frost damage. Simply put, wintering water is good for heat preservation. Second, when the temperature is often below zero at night, we generally do not water the garlic to prevent the water from rising quickly and causing frost damage.