Preserving the exotic beauty of calla lilies at home often becomes a real test for the gardener, especially with the onset of the cold season, when the plant inevitably goes into a deep dormancy phase. It is during this period that the question of where and how to provide the tubers with stable conditions becomes critically important so that they do not dry out ahead of time or, even worse, rot from excess moisture and heat. The refrigerator is often considered as an ideal place for wintering, but its use requires strict adherence to the temperature regime and the rules for preparing planting material.
Many novice gardeners make the fatal mistake of simply leaving the dug up tubers at room temperature, which leads to premature awakening of the buds and depletion of the plant even before the onset of spring. Proper wintering is not just storing the roots in a dark corner, but a complex biological process that requires control of humidity and air access. In this article we will analyze in detail the algorithm of actions that will allow you to maintain the viability of tubers and get abundant flowering in the next season.
Preparing tubers for winter storage
The first and most important stage is the timely and competent digging of tubers from soil, since their further safety in the refrigeration chamber depends on this. Callas are usually dug up after the first light frost, when the leaf mass begins to turn yellow and wither, signaling the plant's transition to a dormant state. You cannot delay this procedure until severe frosts, since frozen tubers are stored much worse and can quickly rot.
After removal from the ground, the tubers must be carefully cleaned of soil residues, but this should be done with extreme caution so as not to damage the thin skin and break off small daughter bulbs. Damage on the surface they become an open gate for infections, which in the confined space of the refrigerator spread instantly. Many experienced gardeners recommend not washing the tubers with water, but only lightly shaking off the soil, allowing them to dry completely in the air for several days.
⚠️ Attention: Never store damp or wet tubers - condensation inside the package will provoke the development of mold and rot in a matter of days.
The next step is the mandatory drying and processing of the planting material, which is an integral part of preparing for long-term storage. The tubers are kept in a dry, ventilated room at a temperature of about 20 degrees for 1-2 weeks, until a dense protective skin is formed. Only after this can disinfection be carried out with a weak solution of potassium permanganate or fungicide to destroy fungal spores.
☑️ Preparation checklist
Optimal temperature conditions and humidity
The refrigerator is a complex environment where temperature indicators may vary significantly depending on the shelf area and unit model. For successful storage of calla tubers, it is critical to ensure a stable temperature range from +3 to +7 degrees Celsius, since it is within these limits that biological processes in the plant freeze, but do not stop completely. At higher temperatures, the buds can begin to grow as early as January, and the newly established tuber tissues risk freezing.
Air humidity is the second key parameter, which is often overlooked when focusing only on temperature. In the refrigerator, the air is usually dry due to the operation of the No Frost system, which can lead to wrinkling and dehydration of calla tubers. Optimal humidity for storage it should be 60-70%, so the use of special moisturizing substrates or sealed but breathable packaging becomes a prerequisite.
The location of the tubers inside the refrigerator also matters: the bottom shelf or vegetable compartment is best, where temperature fluctuations are minimal. Planting material should not be placed near the freezer or at the back wall, where the risk of local hypothermia is highest. Constant monitoring of conditions will help to avoid unpleasant surprises during spring planting.
| Parameter | Optimal value | Critical value | Risk of deviation |
|---|---|---|---|
| Temperature | +3...+7 °C | Below 0 °C or above +10 °C | Freezing or premature growth |
| Humidity | 60-70% | Below 50% or above 80% | Wrinkling or rotting |
| Light | Complete darkness | Direct light | Awakening of the kidneys |
| Ventilation | Moderate | None air access | Suffocation and mold |
Choosing suitable packaging for the refrigerator
The choice of containers for storing calla tubers in the refrigerator directly affects the microclimate in which the planting material will be located all winter. Plastic bags, often the default choice, are a poor choice as they do not allow air to pass through and allow condensation to accumulate. Paper bags, cardboard boxes with holes for ventilation or fabric bags that allow the tubers to “breathe” have proven themselves to be the best.
For additional protection and maintaining moisture, the tubers are often sprinkled with dry peat, vermiculite or wrapped in several layers of newspaper. Natural materials they perfectly absorb excess moisture and release it back when drying out, creating a buffer zone. It is important that the packaging is spacious enough and the tubers do not lie tightly pressed to each other, which will ensure air circulation.
Alternative materials for packaging
Instead of peat, you can use dry sphagnum moss or even ordinary hardwood sawdust, the main thing is that they are absolutely dry and clean.
If you use plastic containers, be sure to make several holes in them for ventilation and do not close the lid tightly. Periodically, once every 2-3 weeks, the packaging should be opened to ventilate and inspect the tubers for the appearance of rot or mold. This approach will allow storage conditions and save planting material.
Regular inspection and care during the dormant period
The winter storage period is not the time for plants to be completely forgotten, since regular monitoring of the condition of tubers allows you to notice and eliminate problems in time. At least once a month, it is necessary to remove the packaging from the refrigerator and carefully inspect each tuber for the appearance of soft spots, mold or an unpleasant odor. Timely detection Rot allows you to save the tuber by cleaning the affected area and treating the cut with brilliant green or charcoal.
If you noticed that the tubers began to wrinkle and lose turgor, this is a sure sign that the humidity in the storage is too low. In this case, the substrate in which they lie must be slightly moistened with a spray bottle, but under no circumstances should the tubers themselves be wetted. Conversely, if condensation appears on the walls of the package or the substrate is moistened, all contents must be urgently dried and the filler replaced.
⚠️ Attention: If fluffy gray or white mold appears on the tuber, immediately isolate it from healthy ones and treat it with a fungicidal solution to prevent an epidemic.
Particular attention should be paid to daughter bulbs, which may separate from the mother tuber during storage. They also need to be inspected and, if necessary, dried, as they are more sensitive to changes in humidity. Proper care during this period will ensure that in the spring you will receive healthy and strong planting material, ready for rapid growth.
Typical mistakes and ways to prevent them
One of the most common mistakes is storing calla tubers with fruits and vegetables that emit ethylene. This gas accelerates the ripening of fruits, but for dormant plants it is detrimental, as it stimulates premature awakening of the buds and aging of tissues. Ethylene exposure It can lead to calla lilies starting to grow already in the middle of winter, when there is not enough light for normal development.
Another common mistake - digging too early or, conversely, too late, when the tubers have already been frozen. In the first case, the plant did not have time to accumulate a sufficient amount of nutrients, in the second, the tissues were damaged by cold. Both options lead to poor keeping quality and a high probability of death of planting material during the winter months.
Some gardeners try to speed up the drying process by using radiators or heaters, which is strictly prohibited. Severe dehydration leads to wrinkling and death of the growth points that are located on the surface of the tuber. Drying should take place slowly, at room temperature and good air circulation, so that the plant has time to adapt to a dormant state.
Preparing for spring awakening
Towards the end of March or At the beginning of April, depending on the climate zone, calla tubers must be gradually brought out of dormancy. A sudden change in conditions from cool and dark to warm and light will be very stressful for the plant, so the awakening process should be smooth. First, the tubers are removed from the refrigerator and left in the package at room temperature for a couple of days for acclimatization.
Then you can re-treat with a fungicide and put the tubers in a bright place for germination if you plan to plant them early in pots. At this stage, it is important to provide warmth and moderate moisture to start growth processes. Active awakening usually takes from 2 to 4 weeks, after which the plants are ready for transplanting into the ground or larger containers.
If you plan to plant directly in open ground, wait until the moment has passed there is a threat of return frosts, and the soil will warm up to +10 degrees. By this time, the tubers should already have sprouting growth buds, which will be a signal of readiness for the start of a new growing season. Properly stored and prepared tubers will bloom the same year, delighting with their grace and aroma.
Is it possible to store calla tubers in the freezer?
Absolutely not. The temperature in the freezer drops below -18 degrees, which will lead to crystallization of water in the plant cells and their rupture. Calla tubers are not frost-resistant and will die instantly.
What to do if the tuber has become soft?
Softness indicates the beginning of putrefactive processes. If the area is small, you can cut it with a sharp sterile knife to healthy tissue, treat the cut with brilliant green and dry it. If the entire tuber is soft, it cannot be saved.
Do you need to remove old roots before storage?
Yes, it is better to carefully remove old, dead roots so that they do not become a source of infection. However, it is better to leave young roots, if any, as they can help the tuber adapt faster in the spring.
How to distinguish a healthy tuber from a diseased one?
A healthy calla tuber should be elastic, heavy for its size, with a uniform color and without spots. A diseased tuber often has an unpleasant odor, soft areas, wrinkled skin or visible mold.