While the end of your personal summer break may have been predetermined, determining when that would be necessary for your indoor plants can be a little more challenging. It all relies on the temperature, and more specifically, the lows during the night. Make sure to bring your indoor plants back inside before the nighttime low falls below 45 degrees Fahrenheit. Damage is likely to occur at lower temperatures, especially to sensitive young leaf and stem tips.
When must to plants be brought inside?
Depending on the type of plant, you should decide when to bring it inside. However, it’s important to keep in mind that many common flowering container plants (such as begonias and hibiscus) are truly tropical natives and dislike chilly nights. A chill can significantly slow down an organism’s growth, even if it doesn’t kill them.
When nighttime temperatures begin to fall below 55 to 60 degrees Fahrenheit, it is preferable to bring indoor plants (12-15 C.). Look for pests that may be hiding in the soil of container plants before bringing them indoors. For 15 minutes, immerse each pot in warm water to force any insects or slugs to the surface. If you notice a lot of activity, spray your plant with an insecticide and repot it.
This is also an excellent time to repot any of your plants that are outgrowing their containers.
The plants that require the most light should be placed in windows that face south or under grow lights when you bring them inside. Plants that require less light can be placed in windows that face east or west. The light will probably be dimmer than it was outdoors no matter where they go. This shock may cause some leaves to turn yellow and fall. But after it adjusts to the new light level, your plant ought to produce fresh, wholesome leaves.
Water your plants less frequently than you did when they were outdoors so that less of it evaporates. On the other hand, the air inside your home is probably less humid. This issue should be resolved by setting your pot on a dish on a layer of gravel that is maintained consistently moist. Simply watch out that the water level in the gravel doesn’t rise above the level of the container or you run the risk of root rot.
What degree of cold is too much for houseplants?
Planting too early might result in a crisis if a cold snap is impending, whether it was because you were seduced by some striking hue at the garden center or simply wanted to start the gardening season early. It’s not difficult to help your seedlings survive the great frost, but it does take some planning.
When temperatures drop, you can usually rely on improvised protection for plants. The necessary tools must be prepared in advance to protect plants from frigid mornings for larger plantings, such as a food garden.
Knowing when prized vegetation starts to turn frost-burned brown will help you know what to do when freeze warnings are in effect. As a general rule, plants typically freeze when the temperature stays at 28°F for five hours.
There are, of course, exceptions to this rule. When temps drop to 32–33F, seedlings often die because of their delicate new leaves. There are many low-temperature thresholds for tropical plants. Some collapse at temperatures below 40°F, while others break down at 35°F. Other plants are naturally resistant and can endure temperatures as low as 18 to 20 degrees Fahrenheit. Do a search in gardening books and internet resources to discover the threshold for your plants.
Take it up
Moving plants away from potential danger is the simplest cold-protection strategy. Potted plants and seedlings in flats both benefit from this. Moving plants onto a porch with a roof, into a garage or shed, or under a deck frequently provides sufficient shelter.
Rely on Water
Just before sunset, water the soil to raise the temperature of the surrounding air overnight as the water evaporates. Water-filled buckets or gallon jugs should be left in the sun all day. Move them close to threatened plants at night. Air temperatures will be moderated by the water, and if it freezes, heat will be released. To boost midday heating, paint a few water-holding containers black for best results.
the air flowing
The biggest harm is done to plants by cold, motionless air. To prevent frost from accumulating on plants, you can use an electric fan all night to create a breeze. Never forget to keep electrical connections dry.
Plants Should Be CoveredPlants should be covered with sheets, towels, blankets, cardboard, or a tarp to protect them from everything but the harshest freezing (28F for five hours). Inverting baskets, coolers, or any other container with a firm bottom over plants is also an option. Before it gets dark, cover plants to keep warm air in. Coverings shouldn’t ideally contact the foliage. If windy conditions are anticipated, anchor cloth coverings.
When the temperature rises and the frost has melted in the morning, remove coverings. Under dense covers, heat from the sun can accumulate and cause plant death.
Blankets that collapse
Row covers, or gardening blankets, should always be accessible. These covers are created in various thicknesses from plastic or synthetic fibers. Lay row covers directly on the plants, or suspend them over a bed with pegs to form a tunnel.
Activate lights
An incandescent light bulb produces enough heat to raise the temperature of the air around it just enough to keep a plant from freezing. For this method to operate, bulbs must be close to plants (within a distance of 2-3 feet). (Fluorescent bulbs can’t produce enough heat to complete this task.)
Defend specific plants
Set up hot caps
At planting time, stiff plastic containers with venting holes are placed over the individual seedlings. Hot caps function similarly to cloches (small greenhouses), but the daily task of applying and removing the covering is eliminated by venting holes. Use plastic two-liter bottles or gallon jugs with the bottoms cut off and the lids removed to simulate a hot cap (but saved). In the evenings when the weather turns chilly, replace the lids.
A Wall O’Water tepee, which encircles individual plants with a sleeve of water-filled tubes, is a variation on the hot cap concept. During the day, the water absorbs the heat of the sun. The water gently freezes at night, releasing the sun’s stored radiant heat and preventing the air within the tepee from becoming frosty.
Adjust Your Watering Routine
Although it may seem contradictory, the majority of indoor plants require less water in the winter. Despite the fact that winter air is dryer, plants develop more slowly and some even fall into complete dormancy during the colder months. As a result, plants require less water to maintain their hydration, and overwatering can cause root rot. Remember that different plants require varied amounts of water. Drought-tolerant cacti and other succulents may not require any watering, whilst certain tropical plants may still need more frequent watering.
Winter months can cause surface soil to dry up more quickly, but it isn’t necessarily a sign that the plant needs water. When the soil is dry an inch or two below the surface, test it with your finger; if it is, it’s time to get the watering can out.
Tip
Do not water your houseplants with cold water. To prevent shocking the roots of the plant, use water that is close to room temperature. In some winter climates, tap water can become very chilly; thus, wait several hours before using it to water your plants. This kind of gradual warming also enables dissolved gases, such chlorine, to evaportate from the water.
Alter Humidity Levels
The largest challenge that indoor plants face throughout the winter months is often low humidity levels. Plants like a humidity level that is closer to 50%, which might drop to 10 to 20% in heated homes during the winter. If your home has a humidifier, move your plants there so they can benefit from it. If you don’t have a humidifier, find another way to increase the humidity.
Organize your plants first into groupings. Plants naturally release water through their leaves through transpiration, thus combining them will make good use of that moisture. Because they absorb moisture from showers and cooking, bathrooms and kitchens are the greatest places to keep plants.
The age-old method of putting your plants on or close to a tray of water is another excellent choice. But avoid letting the plants submerge themselves in the water. Put stones or pebbles in the tray to elevate the pots’ bottoms above the water line, then set the pots on top of the stones. By doing this, humidity levels will rise without encouraging root rot.
Instead than helping the plants, misting usually works better at making the gardener feel good about themselves. You might believe that spraying your plants will provide them with some comfort, however misting just provides a brief burst of moisture. Because indoor temperatures allow moisture to evaporate quickly, misting is necessary several times a day to be effective. Try misting if you only have a few plants and believe you will be really diligent about it. An indoor plant may rarely be over-mist. Misting plants in humid summers can result in fungal issues, but this shouldn’t be a concern in the winter.
Pay Attention to Temperature
Like most people, most plants thrive in temperatures above 50 degrees Fahrenheit at night and between 65 and 75 degrees Fahrenheit during the day. Keep your plants away from heat sources like radiators, ovens, fireplaces, and electronics in order to give them that, as well as from chilly drafts. Houseplants can die from temperature changes just as quickly as from extended exposure to heat or cold.
Follow the Sun
In addition to having fewer daylight hours, wintertime sunlight also comes in at a lower angle. Your houseplants might need to be moved to a brighter location or even given more light. An all-day sunny window with a south or west orientation is an ideal location. Moving plants next to a chilly window, however, should be avoided since they might experience a draft.
Every time you water your plants, rotate the pots by roughly a quarter of a turn. This prevents some branches from reaching for the light, allowing the plant to grow evenly and receive some sun on all sides.
The amount of light that reaches plant leaves can also be diminished by layers of dust. This dust can be removed from leaves with a moist cloth, giving plants more access to light during the winter.
Plants will need to be exposed to the grow lights for extended periods of time in regions where the winter sun is essentially nonexistent and where the majority of their light comes from supplemental lighting. If a plant needs six hours of direct sunshine, it can also require an additional 12 or 14 hours of light to provide the same amount of energy. Grow lights are far less strong than sunlight, thus plants require more time under them to absorb enough energy.
Put Your Houseplants on a Diet
Because they are not growing as quickly in the winter, the majority of houseplants don’t require any fertilizer. Stop feeding them until early spring as continuing to do so would only disrupt their natural cycle. Resuming fertilization will give them a boost for the growing season if you start to notice new growth or the present leaves seem to be turning greener.
Some tropical plants grow rather actively all winter long, especially vining climbers or trailers, and they may still need some feeding, but often at decreased rates.
How are plants moved indoors during the winter?
It’s time to bring indoor houseplants that spent the warm months vacationing outdoors now that the evening temperatures are dropping. Your sensitive tropical and subtropical plants are safest indoors when the nighttime temperature is 45 degrees Fahrenheit or lower.
Mandy Stanley, a ceramic artist and Pilates instructor from Acworth, Georgia, advises bringing indoor houseplants as a pleasure for you during the upcoming long winter days in addition to preserving them from impending death outside.
She adds, “I bring in herbs that I use for cooking all winter, such as thyme, oregano, chives, and tarragon, and I feel comfortable having all of the extra greenery home when the weather outside is cold and unpleasant.
The following guidelines should be kept in mind while bringing indoor houseplants in order to ensure their success over the winter.
1. Spray your plants vigorously with water outside, follow that with insecticidal soap, then allow the area to air dry. “This method is vital because it eliminates and destroys insect pests and their eggs,” adds Stanley. “Any pests on your plants will swiftly spread indoors and infest your indoor garden, multiplying quickly.
How cold is 36 degrees for plants?
Eek!! The forecast calls for evening lows at or below freezing with frost! What shall I do?
The good news is that there are a few simple things you can do to help protect your plants against cold conditions. Remember that a frost is different from a freeze. Additionally, following a frost in the fall, some crops, such as beets, parsnips, and carrots, only get sweeter to taste.
Know Your Frost Dates
Priorities first! Always keep in mind the first and latest frost dates that often occur in your area.
The first day of the year that a frost occurs is regarded as the first frost date as the fall weather begins to cool. The first freeze date of the year will come as the weather cools further, typically a week or two later (this is what kills most annual plants). The first freeze day and first frost date in Missoula are both in the middle of October.
The average last frost date is the first day of the year we may anticipate a frost when the weather starts to warm up in the spring. The last frost date in Missoula is May 18.
These dates are typically correct but by no means exact because they are based on historical meteorological data that was gathered over a 30 year span. Be diligent, keep an eye on the forecast, or set up a weather app alert to be notified when the nightly lows change. Use the four techniques listed below to temporarily safeguard your plants when temperatures are predicted to drop to near or below freezing.
Assess: How Bad Is It?
Plants are harmed by temperatures at or below freezing for longer periods of time than just a single day. Similar to how lower temperatures are tougher on plants than those at or near freezing, really cold temperatures that linger for several hours are significantly harder on plants than those that are at or near freezing for only an hour or less. When assessing the seriousness of the weather report, bear this in mind along with a few of the crucial definitions listed below.
When the temperature is forecast to drop to between 36 and 32 degrees Fahrenheit, a frost advisory is issued.
When there is at least an 80% likelihood that the temperature will drop to 32 degrees Fahrenheit or lower, a freeze warning is issued.
The majority of plants are severely harmed by a severe or harsh freeze, 25 degrees Fahrenheit or lower.