With the onset of the first serious frosts, every gardener is faced with the question of the fate of his favorite variety. Dug up tubers require immediate processing, otherwise they may rot or dry out long before the onset of warm weather. Refrigerator often becomes the only accessible place in a city apartment where a stable temperature regime can be ensured.
However, storing rhizomes in a household appliance has its own subtle nuances, ignoring which leads to loss of planting material. The main problem is humidity control: dry refrigerator air draws out moisture, and excess dampness provokes rot. The optimal temperature for wintering dahlias is from +3 to +5 degrees Celsiuswhich fully corresponds to the conditions of the main chamber or freshness zone.
In this article we We will analyze in detail the entire technological process, starting from autumn digging and ending with spring awakening. You'll learn how to properly prepare tubers, how to wrap them, and how often to check the condition of the root ball. Proper packaging will avoid drying out of the tubercles and the spread of mold in a confined space.
Preparatory stage: digging and primary processing
The start of work always occurs after the first autumn frost, when the foliage turns black, but the stem has not yet begun to rot. Tubers should not be left in frozen ground, as the thin skin is damaged and bacteria can penetrate inside. Carefully dig up the bush from all sides with a pitchfork, trying not to damage the root collar, where the dormant buds are located dormant buds.
After removal from the ground, the stems are cut off, leaving stumps about 10-15 centimeters high. Root tubers must be thoroughly rinsed under running water, removing all remaining soil. To disinfect, it is recommended to soak them for 30 minutes in a weak solution of potassium permanganate or a specialized fungicide, which will kill fungal spores.
The key point is proper drying before storing. Place the processed tubers in one layer in a ventilated area for several days. Wet areas will quickly lead to the development of rot, so make sure that the stem cuts are completely hardened and the surface is dry and rough.
⚠️ Attention: Never store tubers with mechanical damage or signs of rot. Even one infected specimen can destroy the entire crop, since mold spores spread instantly in the confined space of the refrigerator.
Before final packaging, inspect each rhizome for integrity. If you notice minor damage, you can sprinkle it with crushed coal or treat it with brilliant green. Only absolutely healthy and dry material is ready for the next stage - packaging in paraffin or vermiculite.
☑️ Preparing tubers for wintering
Packaging methods for the refrigerator compartment
The choice of packaging material directly affects the success of wintering. The main task is to create a buffer zone that will smooth out changes in humidity inside the refrigerator. The most affordable way is to use newspaper or craft paper. Each tuber is tightly wrapped in several layers, creating a kind of cocoon.
A more modern and effective method involves the use of vermiculite or peat. Root tubers are placed in plastic bags or containers, sprinkled with moistened (but not wet!) filler. This allows you to maintain an ideal microclimate around each root, preventing wrinkling.
For especially valuable varieties, waxing is often used. The tuber is quickly dipped into molten paraffin, allowed to harden and packaged. Such a film completely eliminates the evaporation of moisture and the access of oxygen, transferring the plant to a state of deep anabiosis. However, in the spring, such tubers require careful cleaning before germination.
| Packing method | Advantages | Disadvantages |
|---|---|---|
| Paper wrapper | Cheap, availability | Risk of drying out, requires frequent checks |
| Vermiculite/Peat | Stable humidity, protection | Takes up more space, requires a supply of material |
| Waxing | Maximum protection from drying out | Labour-intensive, difficult to remove in spring |
| Dense polyethylene | Tightness | High risk of rotting without ventilation |
Regardless of the method chosen, avoid using sealed, sealed bags with no filling. Condensation will inevitably form in them, which will become a habitat for bacteria. If you use bags, be sure to leave them slightly open or make several punctures with a needle for air microcirculation.
Placement and temperature conditions in the refrigerator
The correct placement of packaged tubers inside the refrigerator is critically important. You should not put them in the door, as the temperature there fluctuates greatly when opened. The ideal place is the bottom shelf of the main chamber or a special compartment for vegetables and fruits, where the mode is most stable.
Make sure that there are no fruits that emit ethylene, such as apples or pears, next to the dahlias. This gas accelerates ripening and can provoke premature bud germination or, conversely, accelerate tissue aging. It is better to allocate a separate shelf or bottom drawer for flowers.
Temperature control is your main tool. If you don't have an accurate thermometer in your refrigerator, purchase a separate device and place it next to the tubers. A temperature drop below zero will lead to tissue death, and an increase above +7 degrees will trigger active biochemical processes.
⚠️ Attention: Avoid placing tubers in close proximity to the back wall of the refrigerator or evaporator. There, the temperature can drop below zero, which will lead to freezing and rupture of the cellular structures of the root.
If your refrigerator is equipped with a system No Frost, the air in it is very dry. In this case, the use of moistened vermiculite or double paper wrapping becomes mandatory. Without additional protection, tubers can lose up to 30% of moisture in just one month of storage.
Humidity control and regular inspection
The storage process should not be left to chance. Every two to three weeks it is necessary to conduct an inventory audit. Remove the tubers, carefully unwrap the packaging and carefully inspect the surface for mold or soft spots.
If you notice a light white coating, this is a signal of high humidity. Gently wipe the affected areas with a cloth soaked in a fungicide solution, dry and replace the packaging with a dry one. If rot is detected, damaged tissue is cut out with a sterile knife to healthy tissue and the cut is processed.
If the tubers begin to wrinkle and lose turgor, it is necessary to urgently increase the humidity. You can lightly spray the filler (vermiculite or sawdust) with water from a spray bottle or replace the paper wrapper with a thicker one. The main thing is to prevent complete dehydration, since sluggish tubers in the spring produce weak shoots.
Regular inspection allows you to identify problems at an early stage. A healthy tuber should be firm, elastic and evenly colored. Any changes in color to gray or black, the appearance of an unpleasant odor indicate that the process of decomposition has begun.
Typical mistakes when storing in an apartment
Many flower growers make mistakes, believing that the refrigerator will solve all problems automatically. The most common of them is the laying of under-dried tubers. Moisture remaining on the surface in a confined space creates a greenhouse effect, ideal for the development of pathogenic microflora.
Another mistake is using too dense, non-porous materials without ventilation. Plastic bags tied tightly in a knot become a moisture trap. Tubers suffocate and rot in a matter of weeks, even at the right temperature.
The light factor is often ignored. Although the refrigerator is closed, frequent opening of the door and light from the lamp can stimulate growth processes. If you notice that the buds have swollen or begun to grow, the storage temperature should be reduced slightly, if the design of the device allows it.
Can dahlias be stored in the freezer?
Absolutely not. The temperature in the freezer is -18°C or lower. The water in the plant cells crystallizes, forming sharp ice crystals that tear the cell walls. After defrosting, such a tuber will turn into a shapeless mess and will not sprout.
Spring awakening and preparation for planting
With the onset of March-April, depending on the climate zone, the tubers begin to prepare for the new season. Take them out of the refrigerator, remove the packaging and inspect them carefully. If the root tubers have overwintered in paraffin, carefully remove the shell, being careful not to damage the awakened sprouts.
Divide the nest into sections using a sharp, disinfected knife. Each part should have one living bud and part of the root collar. Be sure to treat the cuttings with ash or brilliant green and dry them for 24 hours before planting in the ground or sprouting
To speed up the growing season, the tubers can be placed in boxes with wet peat or sawdust and placed in a warm, bright place. After 2-3 weeks, strong shoots will appear, which will allow you to flower 2-3 weeks earlier than usual. This is especially important for regions with short summers.
Quality preserved planting material is the key to lush flowering. Healthy, elastic tubers quickly begin to grow and form a powerful root system. Don’t be lazy to follow the storage technology, and your dahlias will thank you with abundant and long-lasting flowering.
Is it possible to store dahlia tubers together with vegetables?
It is not recommended to store dahlias together with vegetables, especially potatoes. During storage, vegetables release moisture and ethylene, and can also be a source of fungal diseases (for example, late blight), which can easily spread to flowers. It is better to allocate a separate compartment or box for flowers.
What to do if the tubers have dried out?
If the tubers have become light and wrinkled, but have not rotted, they can still be saved. Try soaking them for several hours in a solution of a growth stimulator (for example, Epin or Zircon) or simply in warm water. Then wrap it in a damp cloth and place it in a warm place. Some tubers can restore turgor and sprout.
Is it necessary to remove old roots before storage?
Thin suction roots that formed in the summer usually die off or rot by winter. Before storing them, they can be carefully removed, leaving only the thickened tubers and root collar. This will reduce the risk of rotting and save space.
How to understand that a tuber is gone?
A spoiled tuber becomes soft, flabby, and when pressed, liquid may be released from it. The color of the fabrics changes to dark gray or black, and a characteristic unpleasant smell of rot appears. Such specimens must be immediately thrown away away from healthy supplies.