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.
How cold should it be for indoor plants?
The easiest time of year to kill a houseplant is definitely during the winter. Houseplants are put to the test by harsh growing conditions like low light levels, dry air, shorter days, and frigid temperatures.
Making care routine adjustments to accommodate seasonal growing circumstances is the key to ensuring that plants survive the winter. Review the fundamentals to provide your indoor plants with the best care during winter.
Winter causes the sun to set later in the day, which results in a 50% reduction in light levels near windows. During the winter, indoor plants that thrive near a sunny eastern or northern window during the summer may require a southern or western exposure. Similarly, plants near windows in the west or south that require filtered light in the summer might be able to endure direct sunlight in the winter.
To aid plants in adjusting to shifting light conditions:
- If it’s possible, move plants nearer to the windows.
- Window cleaning will maximize light transmission.
- For the winter, move plants to new areas next to windows with more light.
- Cleanse plants to allow leaves to utilize the light that is available to the fullest.
- Add synthetic lighting. Fluorescent lights are sufficient. They generate less heat and are less expensive than conventional grow lights. For best results, place bulbs 4–12 inches away from plants.
Tropical plants, which make up the majority of indoor plants, like daytime temperatures of 65 to 75 F and nighttime temperatures of around 10 F lower. Low temperatures (below 50F) can be problematic for many plants.
In order to make the thermostats more comfortable for you, keep in mind that your plants also require some thought.
- Keep plants away from heat sources and cold gusts.
- Maintain a few inches of space between plants and external windows.
- Plants should be moved away from windows at nightfall in cold climates if windows freeze over at night. Additionally, you may tuck a thick shade or another insulating item between the plants and the glass.
In the cold, homes might only provide 5–10% relative humidity. Houseplants prefer 40–50%. Brown leaf tips and the presence of pests like Spider Mites are indicators that plants are being stressed by low humidity. Learn how to increase the humidity around plants in simple methods.
Overwatering is the most frequent issue that indoor plants encounter throughout the winter. 95% of indoor plants require the soil to almost totally dry out before watering. How do you determine whether plants need water?
- Don’t only test a small area of the soil’s surface. When the root zone is dry, plants require moisture. Insert your finger up to two inches into the ground. Water the soil if it’s dry.
- Pick up the pot. When soil gets dry, it becomes lighter. Lift pots right away after watering to feel the texture of the moist soil.
- Plants won’t need water as frequently if winterized rooms are humidified. Water must be added to dry air.
- The only exceptions to this rule are citrus and ferns in pots, both of which require continually moist soil. If you are uncertain, always do your research.
Never let plants sit in water that gathers in the drainage saucer overnight when you water.
Fertilize plants all winter long in mild climates. Winter fertilization of indoor plants is not recommended in the coldest climates with little natural light. When springtime outside plants begin to grow, fertilizer can be resumed.
In the spring and summer, when most indoor plants are actively growing, is the ideal time to repot them. Potted woody plants that entirely hibernate in the winter are the exception. Transplant those in the early spring before the buds break.
- Numerous advantages of houseplants include bettering indoor air quality and lowering sickness rates.
What degree of cold is required before bringing your plants inside?
When nighttime temperatures fall to 45 or 50 degrees Fahrenheit, experts advise bringing your plants inside.
37°F: too chilly 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.
How can you tell if your indoor plants are becoming too cold?
Knowing the appropriate temperature for your favorite plants and their preferred circumstances is undoubtedly helpful.
The answer to the question “How cold is too cold for houseplants?” can be found in more places than only the internet or perhaps some smart books about indoor plants.
Because your plants will make sure to let you know whenever cold damage occurs. So let’s look at the signs of cold damage that are most frequently present:
- sagging leaves
- Leaf tannishness
- withering of plants
- oxidized foliage
- Unstable root ball
Although cold damage should be handled carefully, your plants may still survive despite it.
As an illustration, immediate trimming is typically not a good option because it will upset your plant more.
Additionally, it is a very terrible idea to fertilize your plant right away after it has suffered cold damage.
In terms of temperature, it might make sense for you to shift the plants that were harmed by the cold to a different, warmer place.
This isn’t always a bad idea; just keep in mind that your plant needs some time to become used to its new environment. If you’re relocating your plant to a new area, move it gradually rather than going directly from point A to point B.
Many indoor plants are particularly sensitive to temperature changes; cold-damaged plants are much more so.
At 50 degrees, should I cover my plants?
We are lucky to be able to cultivate semi-tropical and/or tropical plants, such Bougainvillea, Lantana, and Yellow Bells, outdoors if we reside in regions with moderate winters.
The frost-sensitive plants, whose vibrant blossoms we love in the summer, frequently require additional care in the winter. When is the final frost? Even gardeners in chilly climates have to make a guess.
Damage to the leaves and occasionally even to the roots can happen when temperatures fall between 32 and 24 degrees F.
How to Protect Plants From Frost
What can you do, then, to help safeguard your frost-sensitive plants? During the chilly nighttime hours, cover them. The soil absorbs the heat of the sun during the day. When plants are covered in the evening, the heat that the earth radiates back into the night is trapped by the covering.
What Should You Cover Plants With?
You might be unsure about the best coverings to use on your frost-sensitive plants.
You might do as we do and go through your linen cupboard for used blankets, sheets, and towels. Of course, you can also use frost cloth and burlap from your neighborhood nursery. Frost protection fabric is available on Amazon.
How warm should it be for plants to be left outside?
Your plants enjoy the warm temperatures and sunny days of summer just as much as you do! The Grow-HowTM Team provides all the information you need in regards to bringing your indoor plants outside throughout the summer.
Can all plants go outside?
Yes, during the hot summer months, all of our interior foliage plants can be moved outside. After all, there is where plants originated! They will appreciate breathing in the crisp outdoor air. When putting your plants outside, one of the most important things to consider is the strength of the outdoor sunshine.
Many typical houseplants thrive in bright, indirect light that is filtered by the canopy of taller trees above as they do in their natural habitat along the forest floor. You should avoid placing your plant in regions that receive direct sunlight if the plant you have indoors prefers indirect light. Additionally, it’s crucial to get your plant used to being outdoors.
How do I acclimate a plant to the outdoors?
The process of progressively acclimating your plant to a new environment, such as a change in temperature or light intensity, is known as acclimation. In order to avoid undue stress that can hinder growth or harm the plant, proper acclimation enables your plant to gradually adapt to its new environment.
Start acclimating your plant by putting it in a shaded place outside for an hour or two on the first day, and then gradually increase the amount of time it spends outside over the following seven to ten days. Most plants can tolerate direct sunlight during the morning hours since it is significantly less intense. About five days after you begin the acclimatization process, if your plant will receive morning sun, start putting it in the sun for brief periods of time each morning. It is better if plants with a preference for indirect light are protected from the sun by around 10 a.m.
Even plants that can tolerate direct sunshine, like a Bird of Paradise, Sansevieria, Ponytail Palm, and most cacti, need to be introduced gradually over the course of at least 10 days. This will prevent them from experiencing burnt leaves while they adjust to the strength of the full outdoor sun.
When do I know it’s safe to bring my plant outside?
When the outside temperature remains consistently above 50F, you can bring your plants outside without risk. Pay close attention to the forecast. Bring your plants inside for the night if the temperature is forecast to drop below 50F. When it becomes warmer, put them back outside.
They’ll probably be fine if you forget and expose them to lower temperatures for a brief time. Their growth may be temporarily stunted by temperatures below 50F, and leaf damage may result from temps as low as 35F. Most indoor plants will lose all of their leaves in freezing conditions, but if the exposure was only brief, the roots will usually survive.
How cold is 42 degrees for plants?
Being able to cultivate vegetables in your own garden is great. However, you must exercise caution when planting the vegetables. I conducted research to find out how much cold these plants could withstand and have included the results below.
The ideal temperature for a vegetable garden is 32 degrees Fahrenheit. Your vegetable garden’s roots, leaves, and fruits could be damaged by frost that forms in the garden due to this temperature. If the temperature drop is only momentary, you can still safeguard your food crop.
The temperatures at which the plants in your vegetable garden would survive are described in much more depth below. Additionally, I’ve provided advice on how to shield your plants from a brief drop in temperature.