Preserving onion planting material until spring often becomes a headache for gardeners, especially those living in apartments. Under conditions of central heating, the bulbs quickly dry out or, conversely, begin to germinate due to high temperatures. Refrigerator in this case, it becomes an excellent, but requires caution, assistant.
Low temperatures allow you to slow down the metabolic processes inside the bulb, introducing it into a state of deep dormancy. However, simply throwing a bag of onions on a shelf means ruining the crop, turning it into mush or a moldy mass. It is necessary to strictly observe the regime humidity and air circulation.
In this article we will look at all the subtleties that will help you save each bulb until planting in the ground. You will learn how to prepare the material, what container to pack it in, and what mistakes most often lead to damage to the sets.
Preparing the sets for storage
Before placing the onion in the cold, it must be carefully prepared. Ignoring this stage can lead to the fact that even under ideal storage conditions the process of rotting will begin. Drying This is a critically important step that should not be skipped.
If you bought the set in a store or brought it from the market, spread it in a thin layer in a dry, ventilated place indoors. The temperature here should be room temperature and the humidity should be minimal. The drying process takes from several days to two weeks, depending on the initial state of the bulbs.
Bulkhead material allows you to immediately remove diseased or damaged specimens. Even one rotten onion can infect the entire stock with fungal spores. Soft specimens that have spots or a strange smell are subject to rejection.
⚠️ Attention: Never store wet onions. Residual moisture on the scales will instantly start the process of bacterial proliferation when the temperature drops.
For long-term storage, sets with a diameter of 1 to 2.5 centimeters are best suited. Bulbs that are too small (oatmeal) can dry out, and large ones (>3 cm) often go to seed immediately after planting.
Some gardeners practice warming up the seedlings before storage. To do this, the material is placed near the battery for several days. This kills possible infections and additionally dries out the scales, sealing the neck of the bulb.
Optimal temperature conditions
Understanding the physiology of the plant helps to choose the right shelf in the refrigerator. Onions are a cold-resistant crop, but they do not need extreme cold. The main task is to prevent the temperature from falling below the critical level at which tissues begin to deteriorate.
The optimal range for storing seedlings is considered to be from +1 to +3 degrees Celsius. With such indicators, life processes freeze, but do not stop completely. This allows the bulb to remain alive, but not grow.
If the temperature drops below zero, water will begin to crystallize inside the cells. Once thawed, these bulbs will become watery and unsuitable for planting. That is why storage in the freezer is strictly prohibited.
On the other hand, raising the temperature above +5 degrees can awaken dormant buds. The onions will begin to produce green feathers, depleting their supply of nutrients. By the time of planting, such material will be weak and sluggish.
It is important to consider that the temperature may differ in different areas of the refrigerator. The door is always warmer and there are differences when opening. In the depths of the main chamber, near the back wall, it is usually coldest.
⚠️ Attention: Avoid placing the seed directly at the cold air outlet. Local hypothermia can damage the upper scales.
Choosing suitable containers and packaging
Proper packaging solves two problems: maintains stable humidity and provides access to oxygen. Sealed bags are the main enemy of onions when stored in the refrigerator. Condensation quickly forms in them, creating an ideal environment for mold.
The best choice would be paper bags or cardboard boxes with holes for ventilation. The paper perfectly absorbs excess moisture and allows air to pass through. If you use plastic bags, be sure to make a lot of small holes in them.
Fabric bags made of natural materials (cotton, linen, burlap) have also proven themselves well. They allow the bow to “breathe” and prevent fogging. The main thing is that the fabric is dry and clean.
You can use food paper for baking, wrapping small portions of the sets with it. This is useful for separating varieties or batches of different sizes. Plastic containers can be used, but only with an open lid or lattice bottom.
Do not compact the bulbs tightly. They should lie freely so that air can circulate between them. The layer of sevok in the container should not exceed 10-15 centimeters.
Is it possible to store sevok in stockings?
Yes, nylon stockings or tights are a classic and very effective way. The mesh stocking provides perfect ventilation on all sides, and the bow hung vertically takes up minimal space. The main thing is that the stocking does not touch the wet walls of the refrigerator.
Placement in the refrigerator and humidity control
Where exactly in the refrigerator should I place reserves of sevka? The ideal place is the bottom shelf of the main chamber or a special compartment for vegetables and fruits, if the humidity in it can be adjusted. However, the vegetable compartment is often too humid for dry storage.
It is better to place boxes or bags of onions on the shelf above the vegetables. There the temperature is more stable and the humidity is lower. Make sure there are no strong-smelling foods nearby, although onions themselves have a powerful aroma that can be absorbed into milk or butter.
Humidity control is key to success. If you notice that condensation has formed inside the package, immediately remove the onions, sort them and dry them again. Replace wet paper or cloth with dry one.
To absorb excess moisture, you can put a bag of silica gel or charcoal in a container with onions. These substances work as natural adsorbents, maintaining a dry microclimate around the bulbs.
Check the condition of the sets regularly, at least once every two weeks. This will allow you to quickly identify the processes of rotting or germination that have begun. Timely intervention will save the bulk of the crop.
The table below will help you compare different packaging methods and their effectiveness:
| Type of packaging | Ventilation | Moisture protection | Recommended period |
|---|---|---|---|
| Paper bag | High | Medium | Up to 3 months |
| Polyethylene (with holes) | Medium | Low | Up to 2 months |
| Fabric bag | High | High | Up to 4 months |
| Plastic container | Low | High | Up to 1 month |
Shelf life and quality testing
How long can the seeds lie in the refrigerator without losing their germination? If all rules are followed, high-quality planting material retains its properties for up to 4-5 months. Usually this is enough to wait for spring planting.
However, by the end of the storage period (February-March), awakening processes can begin even at low temperatures. Check the bulbs frequently during this time. If tiny green sprouts appear, it is better not to store such onions further, but to use them for forcing onto greens or plant them in the ground, if conditions permit.
Signs of spoilage that you need to pay attention to:
- 🧅 The appearance of soft, watery areas on the neck or bottom.
- 🧅 Change in the color of the scales (the appearance of black or gray spots).
- 🧅 An unpleasant, musty odor, different from the usual onion aroma.
- 🧅 The appearance of a fluffy coating (mold) between the scales.
If you find isolated cases of rot, immediately remove the damaged bulbs. Wipe the place where they were with a dry cloth. It is advisable to sort out the rest of the material and pour it into a new dry container.
Do not store the sets in the refrigerator for too long. After 5-6 months, germination begins to drop sharply, and germination energy weakens. The critical period is the moment of swelling of the buds, after which storage becomes meaningless.
For spring planting, try to remove the onion from the cold a few days in advance so that it warms up to room temperature. A sharp change in temperature when planting in the ground can become stressful for the plant.
☑️ Check before laying
Alternative methods and common mistakes
The refrigerator is not the only place for storage, and not always the best. If you have a glassed-in balcony where temperatures hover around freezing in winter, this may be a more extensive solution. However, the risk of freezing there is higher.
A common mistake is storing the sets next to apples or pears. These fruits produce ethylene, which accelerates the ripening and germination of vegetables. Neighborhood with them will lead to rapid spoilage of onions.
Another mistake is washing the sets before storage. This is absolutely not allowed! Water will wash away the protective layer and cause rotting. You only need to peel dry onions, removing excess peel.
Some try to save frozen onions by quickly defrosting them in warm water. This is a fatal mistake. Thawing should occur slowly, at room temperature, so that the cellular structures are restored.
If you live in a private home, consider storing in a cellar, where it is easier to maintain a stable temperature and humidity without the use of electrical appliances. But for an apartment, the refrigerator remains the best choice.
⚠️ Attention: Do not store the seeds in the same compartment with chemicals or products with a strong odor (fish, smoked meats). Onions actively absorb foreign aromas, which can affect the taste of the future harvest.
Frequently asked questions (FAQ)
Is it possible to store sets in the freezer?
No, absolutely not. Temperatures below -18 degrees will kill the living tissue of the bulb. After defrosting, such onions will turn into mush and will not be able to germinate. The freezer is only suitable for storing peeled and chopped onions for cooking.
What to do if the sets begin to sprout in the refrigerator?
If the sprouts are small (1-2 mm), you can try to pick them off and use the onion for planting, but the yield may decrease. If the sprouts are large, it is better to plant these onions on greens in a box at home or use them in cooking. It is no longer suitable for obtaining onions.
Is it necessary to warm up the sets after refrigeration before planting?
Yes, this is recommended. Remove the onions from the refrigerator 2-3 weeks before planting and keep them at room temperature (+20...+25°C). This will awaken the growth buds and allow the onion to adapt, which will speed up germination in the garden.
How to understand that the set has dried out and will not sprout?
Dry set becomes very light; when you squeeze it in your hand, you feel empty, and the scales easily fall off. If you press on the bottom, it may crumble. It is better to throw away such material, since it will not sprout.
Is it possible to mix different varieties of onions during storage?
Technically, it is possible if they are equally well dried. However, agronomists recommend storing varieties separately. Different varieties may have different shelf life and susceptibility to disease. If one variety begins to rot, it can infect its neighbors.