When the cold weather arrives, many gardens seem to go dormant, and it feels as though there's nothing to do until spring. However, Winter is a key phase for prepare the garden and make the difference between a dull space and one that comes alive when temperatures rise.
What is almost never mentioned is that small details, such as a few degrees more or less, or the exact place where you put a pot, can decide the future of your plants.
Throughout these cold months, The garden doesn't stop, it simply changes paceThe roots remain active, pests seek refuge, and many plants enter dormancy, but that doesn't mean you can forget about them. On the contrary: with a good winter strategy—frost protection, irrigation managementPest control, proper pruning, and special attention to temperature—you'll have a garden that will withstand the winter without drama and start spring with much more strength.
Real strategies for successfully getting through winter
One of the keys to winter gardening is Choose carefully where your children will spend their cold days more sensitive plantsEspecially those of Mediterranean or subtropical origin, such as many citrus fruits. Not all houses or gardens offer the same conditions, so it's best to adapt your strategy to what you have.
The first option is to use a protected space, such as a greenhouse, a nursery, or a small glazed winter gardenIn these structures, plants are protected from wind, direct rain, hail, and severe frost, and the temperature is usually several degrees higher than outside. It's a very practical solution for delicate collectionsbonsai, potted citrus trees, or tropical plants that do not tolerate intense cold well.
When a greenhouse is not available, another effective alternative is Place the plants in a very bright locationwith moderate temperatures, between about 5 and 10 °C. It could be a garage with a window, an enclosed gallery, a glazed porch or a poorly heated room. It is important to ventilate frequently and, if strong direct sunlight enters from the end of January onwards—especially through south-facing windows—provide some shade to avoid sudden heat waves that can upset the plants.
Some people try to make trees and plants survive the winter inside the home at temperatures of 16/18 to 20 °CThis option is possible, but it is the most complicated to manage. as explained by common gardening mistakesThis is because in many homes the heating keeps the living room above 21°C and the available natural light in winter is often limited. To approach ideal conditions, plants should be placed near very bright windows and in rooms where the temperature is not excessive, something that in practice is sometimes only achieved in cold hallways or rooms used only occasionally.
The better you know the light and temperature limitations of your homethe easier it will be for you choose the right strategy for each plant. It's not about seeking perfect conditions—which almost never exist—but about getting as close as possible to what the species needs and observing how it responds in order to adjust care accordingly.
Temperature: the detail that almost no one takes into account
Beyond the ambient thermometer, there is a factor that is hardly ever discussed and that explains many yellow leaves and losses of foliage in winter: the temperature difference between the aerial part and the rootsThis imbalance is more common than it seems, both indoors and on terraces.
In a heated room, the top of the tree or shrub can easily reach 21°C, while The pot rests on soil at 16-18 °C or even less. In other words, the canopy is "comfortable and active," while the roots, in contrast, move much more slowly due to the cold. The result is an imbalance: the leaves demand more water and nutrients than the cold roots are able to supply, and the plant becomes stressed and begins to drop leaves.
To avoid that famous situation of “hot head and cold feet”It's very useful to insulate the base of the pot from the ground. You can place the plants on a wheeled stand, on slats that allow air to circulate underneath, or use a thick sheet of polystyrene as insulation. This way, the roots aren't stuck to frozen ground and the temperature of the root ball is closer to that of the surrounding air. For practical ideas on protecting plants and pots in winter, see [link to relevant article/section/etc.]. How to protect crops in winter.
The opposite problem can also occur in houses with Underfloor heating or radiant floor heatingIn that case, the base of the pot can easily reach 20-28°C while the above-ground portion remains around 18-22°C. Now the roots become overactive, absorbing water and nutrients rapidly, but the leaves—being cooler—don't utilize them at the same rate. This imbalance again generates stress and, once more, leaf drop.
If you notice that your houseplants or citrus trees are losing leaves in the middle of winter for no apparent reason, stop and think about how can the temperature be distributed in the roomSometimes, with the simple gesture of raising the pot a few centimeters or moving it slightly away from an area of radiant floor heating, the plant stops suffering so much and stabilizes.
Protection against cold, snow and frost
Low temperatures, dry winds, and prolonged frosts are the biggest enemies of the winter garden. Interestingly, A continuous layer of snow can act as an insulator and protect the soil and roots, whereas dry cold without snow is usually much more damaging to leaves, shoots, and surface roots.
If a severe frost is expected and the ground is very dry, a good strategy is water the soil thoroughly (with the exception of succulents, such as aloe vera, crassulas, or jade trees, which prefer dryness). Slightly moist soil retains heat better than completely dry soil, protecting the root system and keeping the air near the soil somewhat warmer, reducing the risk of the roots freezing.
It is very effective for the most delicate plants. wrap them or cover them with protective materialsYou can use burlap, a special thermal gardening blanket, winter fleece, straw, cardboard, or even old blankets. The goal is to create an air chamber around the plant that acts as a protective layer and dampens sudden temperature fluctuations.
In addition to covering the above-ground parts, it's also advisable to protect the root zone, especially in perennial plants and young shrubs. For this, you can apply a good layer of padding with straw, pine bark, dry leaves, or conifer branches on the ground around the base. This plant "quilt" insulates the soil and reduces the impact of repeated frosts, although it is preferable not to use too much fresh compost in this layer to avoid excessively acidifying the soil.
If you have potted plants on terraces or balconies, remember that container roots are more susceptible to cold than roots in the ground. Wind, frost, and temperature fluctuations affect the entire volume of the potting mix. line the flowerpots with bubble wrap, straw, or similar materialsRaising them a few centimeters off the ground and placing them against a sheltered wall can make the difference between losing a plant and ensuring it survives well into spring. For practical winter pot care, check out specific recommendations on flowerpots and winter protection.
How to care for your lawn during winter
The grass also enters a kind of dormancy period as soon as temperatures drop below certain levels. Below about 5°C, the grass practically stops growingSo continuing to cut it as frequently as in summer makes no sense and, in fact, may weaken it.
During the colder months, the best thing to do is suspend the cuts or space them out much moreOnly to even out the height if there are very uneven areas. However, it is worthwhile to dedicate time to something many neglect: regularly removing the dry leaves and plant debris that accumulate on the lawn. This layer of leaves retains moisture, prevents air and light from passing through, and encourages the growth of fungi and worms.
Good winter maintenance includes comb or gently scarify the surface To remove organic matter and improve aeration. If the soil is prone to waterlogging, it can also be helpful to prick or aerate it so that the water drains better and the roots don't spend weeks "sitting in a puddle," which weakens them considerably when the heat returns.
Lawn watering in winter should be adjusted to your local climate. In rainy areas, it's usually enough to... take advantage of natural rainfallWhile in drier climates a specific amount of water may be needed, always avoiding watering during the coldest hours of the day to prevent the surface from freezing.
Irrigation and irrigation systems: what to change in winter
One of the most common questions is whether you should water in winter the same way as in summer. The answer is clear: Not only do we need to water less, we also need to water differentlyMost plants reduce their activity, transpire much less, and their roots absorb water more slowly.
Therefore, it is essential reduce watering frequency In almost all species, it's important to allow the top layer of the substrate to dry out between waterings. Otherwise, water can stagnate in the root ball, cool down too much, and promote both root rot and fungal growth. Furthermore, if temperatures drop below freezing, the retained water can freeze and cause serious damage.
In the case of automatic irrigation systems, winter is the time to Check the entire installation to prevent damage from frost.The first step is usually to shut off the water supply to the system if it won't be used for a while. After that, it's advisable to completely drain underground pipes and exposed conduits to ensure no water remains inside that could expand when it freezes and burst the pipes.
If frosts are light or sporadic in your area and you decide to maintain very limited drip irrigation, adjust the timer so that Watering should be done during the cooler hours of the day.Never use it at dusk or in the early morning, as this significantly reduces its duration. It's also advisable to check and clean drippers and diffusers, as intensive summer use may have clogged them.
Fertilization, compost and soil improvement in winter
Although many plants are dormant, winter is a great time for improve the soil and prepare it for the spring explosionThe goal is not to force growth now, but to enrich the soil so that the roots find a fertile environment when they reactivate.
In flowerbeds, terraces and shrub areas, you can gently remove the first layer of soil and incorporate slow-release organic fertilizers: well-rotted compost, worm castings, or seaweed fertilizers, such as Bokashi. These materials provide nutrients, improve soil structure, and increase beneficial microbial activity.
It is important to choose preferably organic fertilizersEspecially in winter, because they nourish the soil in the long term and prevent salt spikes that could damage sensitive roots during periods of low activity. Furthermore, organic fertilizers help retain moisture in a balanced way and prevent the soil from compacting too much during rain and cold weather.
In lawns or heavily trafficked areas, this addition of organic matter can be combined with a light reseeding or repair of bare patches on milder winter days, so that new seedlings start with a proper nutrient base when temperatures rise. If you're looking for ideas for preparing for spring with seeds and winter sowing, see seeds to sow in winter.
Planting and transplanting in the middle of winter: what to do and what not to do
Contrary to what many think, winter can be a magnificent opportunity to introduce new deciduous trees and shrubs into the gardenAt this time of year they are sold bare-root or in containers, and being leafless they suffer much less transplant shock.
It's a good time for species like rose bushes and other ornamental deciduous treesThese plants will use the winter to develop new, fine roots and will be ready to sprout vigorously in spring. The trick is to plant them on days when the soil is neither frozen nor excessively waterlogged, so you can work the soil well and the roots don't become waterlogged.
Before planting, it is worthwhile prepare the hole wellLoosen the soil thoroughly and mix some of the removed soil with mature organic matter. Avoid highly concentrated or fresh fertilizers at this stage, as these could burn young roots. After planting, water moderately to settle the soil around the roots and, if hard frosts are expected, apply mulch to the surface to protect the root zone.
Regarding transplanting established plants, winter is more challenging for evergreen or warm-climate species, which can suffer considerably. In such cases, it is usually preferable to wait until late winter or early spring, when temperatures begin to cool down and the plant can react more quickly.
Specific care for potted and container plants
Potted plants live in a very limited volume of substrate, so They are much more vulnerable to extremes of cold and heat than those that grow directly in the ground. In winter, this translates into roots that freeze easily, substrates that remain waterlogged for days, and significant temperature fluctuations between day and night.
A good practice is line the most exposed flowerpots with insulating materials Use materials like bubble wrap, old blankets, thick cardboard, or straw. The goal is to protect the edges of the pot, which is where frost is most noticeable. Additionally, raising the pots a few centimeters off the ground with blocks or supports helps the water drain better since they are not in direct contact with frozen surfaces.
It is also convenient move the flowerpots closer to walls or sheltered cornersIdeally, they should face south or east, where they receive some gentle sunlight and are sheltered from the wind. However, avoid placing the plants near sources of intense heat, such as outdoor heaters or hot air vents, because sudden temperature changes stress them greatly.
Regarding watering, potted plants need even more attention than plants in the ground. It's best Water less and always check the moisture of the substrate with your finger before adding more water. In very cold climates, it may be a good idea to water mid-morning on clear days, so that any excess water has time to drain before the freezing nights.
Pests, diseases and winter oil
It may seem that with the cold Pests and diseases disappearBut in reality, many of them are simply taking refuge and waiting for better times. Eggs, larvae, spores, and resistant structures hide in nooks and crannies of the garden, ready to activate as soon as the weather improves.
One of the best defenses is to perform a thorough cleaning of debris that could harbor pestsIn the case of fruit trees, it is essential to collect and remove old fruit left hanging on the branches (known as "mummy fruit") and fruit that has fallen to the ground, as these are often infested with moth larvae and other pests. The same applies to nuts and other dried fruits left on the ground.
In addition to this general hygiene, winter is the perfect time to apply winter oil on deciduous treesThis product is sprayed onto bare trunks and branches, creating a film that suffocates eggs, larvae, and small insects that overwinter in the bark or buds. This significantly reduces pest pressure the following spring.
Using winter oil according to the manufacturer's instructions, on days without rain and without imminent frost, is a very useful tool for to keep mealybugs, mites and other persistent pests at bay without the need for aggressive treatments during peak growth period.
Winter pruning: how and why to do it right
The cold months, when deciduous trees have lost all their foliage, are one of the best times to pruneAt this time, the plants are dormant, with much of their energy stored in their roots and trunks, and they better withstand structural cuts. For guidance on what and when to prune, consult recommendations on Plants that should be pruned in winter.
Since there are no leaves, The branch architecture is very clearThis makes it easier to identify crossing, weak, poorly oriented, or diseased branches. This allows for more precise pruning, maintaining the tree or shrub's strong structure and removing only what is necessary to improve its shape and health.
It is fundamental that The cuts should be clean and well executed.Using sharp, disinfected tools. Poorly made, torn, or very large cuts take longer to heal and are a perfect entry point for fungi and diseases. In some cases, it may be advisable to apply a specific sealant to larger wounds.
In areas with very frequent and severe frosts, it is advisable to postpone the most intensive pruning until the end of winter, around February or March, so that Do not leave wounds exposed to extreme coldDuring the harshest days of winter, only light or sanitation pruning can be carried out, leaving the more important work for when the weather starts to soften.
Another advantage of winter pruning is that Many of the pests and diseases that could take advantage of the cuts They are also dormant, which reduces the risk of immediate infections. This, combined with the increased resilience of trees at the end of winter, makes this time a strategic opportunity to bring all the garden's trees up to date.
If all this is combined with intelligent use of greenhouses and protective measures, careful management of root-canopy temperature, adjustment of irrigation and fertilization, and a good winter cleaning and pruning campaign, The garden will arrive in spring in enviable healthFar from being a dead season, winter is the time when many of the successes (or failures) of the following season are decided, and understanding those little secrets is what makes the difference between a garden that merely survives and one that truly triumphs.
