It’s time to bring many of your outdoor plants inside when frost is forecast. Only indoors will many delicate annuals, bulbs, herbs, and tropical plants make it through the winter. Here are some tips on which plants to bring indoors this fall and how to prepare potted plants for the winter.
When to Bring Plants Inside
True annuals and plants that we cultivate as annuals (which are regarded as sensitive perennials in southern regions) are unable to withstand the chilly winter months. But you don’t have to say goodbye to these plants forever! Even delicate plants that require a winter dormant period can be brought inside as “annuals” in many cases. Ideally, these should be brought inside before the temperature drops below 45 degrees at night (7C). Start bringing the plants inside for the winter when October approaches and nighttime lows dip approximately 50F (10C).
At temperatures below 40F (4C), and for some tropical plants even below 50, harm is likely to occur. To acclimatize them, you must take action well before any actual frost or ice.
Where to Put Plants
I still struggle to find space for everything, despite the fact that the greenhouse we have attached to the house receives plenty of sunlight and never gets colder than 45F. For my benefit, a lot of these plants would experience a dry season in their natural habitat and don’t mind resting under a bench. Particularly when the pots are large, the greenhouse quickly fills up.
Consider making a shelf or area where you may put plants that require high humidity together if you don’t have a greenhouse but have a lot of them. While some people mist their indoor plants, this only has a temporary beneficial effect. Putting a pebble tray under your plants is a better long-term solution. After adding a layer of gravel and lining the trays with waterproof material, add the pots on top. Do not dry out the gravel. You might wish to attach some ceiling hooks if you have hanging plants. Cleaning your windows both inside and outside will help guarantee that plants receive enough light throughout winter.
Which Plants To Bring Inside
You might need to decide what should be brought inside and what should be kept outside. Which flora stand out to you? Which ones cost the most to replace? Additionally, only keep healthy plants; throw away those that have disease or pest issues. Additionally, the lighting in your home is crucial. Even a west or south facing glassed area in winter only has the summer shaded area’s winter light intensity.
Plants that can be carried indoors can be divided into two categories:
- plants that need a time of winter hibernation.
- plants that can continue to thrive while dormant during the winter.
Some delicate bulbs need to spend some time “dormant” in a chilly environment where the temperature is still far above freezing. Numerous of these pricey bulbs are worth overwintering. Tender bulbs include, for instance:
- Caladiums
- A calla lily
- Cannas
- Dahlias
- Animal ears
- Gladiolus
- tubes of roses
Simply stop watering fragile bulbs in pots, remove the withering leaves, and tuck them away in a dark, cool place. Periodically check the soil moisture.
Dig up and trim back the leaves of fragile underground bulbs. By hand, remove as much dirt as you can from the bulb. For 7 to 14 days, leave them in a warm, dry location to dry. This gets rid of extra moisture. Separate them with shredded newspaper or dry peat moss and place them loosely in a cardboard box or open container. Get cozy somewhere chilly and gloomy. To get a head start on the season, pot them up in the spring about a month before you intend to set them outside.
What time of day should I bring my indoor plants inside?
Your plants must be brought inside before the overnight low temperature falls below 45 degrees (F). At temperatures below 40 degrees, and for some tropical plants even below 50 degrees, harm will occur. Before bringing plants back inside, check them for pests and diseases and apply the relevant treatments.
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.
How far in advance should I bring my indoor plants indoors for the winter?
It’s time to bring your indoor plants inside for the winter once the overnight lows begin to fall below 50 degrees. Here are 5 simple steps for achievement:
Decide where your indoor houseplants will reside in step one. Invest in a grow light if your area does not receive enough sunshine. A saucer is also necessary to shield surfaces from moisture. You can buy grow lights and saucers in-store from our wide variety.
STEP 2: For 1-2 weeks, relocate your plant outside to a less sunny spot before bringing it inside. This allows it to adjust to the lower light levels it will experience indoors.
Step three is to properly spray your plant with insecticidal soap a week before bringing it inside. Make sure to spray each leaf from top to bottom.
STEP 4: To get rid of any pests that might be hiding in the soil, saturate it with insecticidal soap the day before you bring the plant indoors. Also re-spray the leaves.
STEP 5: Bring the plant inside to its new location for the winter after leaving it outside to dry for a few hours.
You may enjoy your plants every day of the year by bringing your favorite tropicals and houseplants indoors during the winter. Try it out; if you have any questions, let us know.
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.
What must I do in advance of bringing plants inside?
- your plants in water. Put your plants, planter and all, in a bucket with a solution of insecticidal soap and water (1 tsp of soap per liter of water, or follow the instructions on the container) for around 15-20 minutes. This method of de-bugging plants also has the added benefit of providing plants with a thorough watering. To keep your plants clean when you pull them out, skim debris off the surface of the water while they are submerged beneath you. Take them out, rinse them out, and thoroughly clean the planter once they have finished soaking. Before bringing them inside, spread out some towels and let them absorb any extra moisture. Before watering them once more, make sure the soil is fully dry.
Since your plants will receive far more light outside than they will indoors, it’s crucial to gradually acclimate your houseplants to lower light levels in order to prevent transplant shock.
- Your plants need to adjust. Start by relocating your plants to more and more shady settings each day over the course of a few days, and then bring them indoors. The more time you give them, the better; somewhere between 5 days and 2 weeks is advised. After being relocated, they could drop a few leaves at first, but they’ll quickly get used to their new surroundings!
- Trim a little bit. You may foster new growth that will be more adapted to life inside by pruning your plants when you move them inside. This will also assist limit their size.
- The period is ideal for re-potting. If you discover that one of your houseplants is rootbound while de-bugging it, this is an excellent moment to upgrade it to a new container. Or, you might need to pot a plant for the first time if you’re trying to bring one in that was previously planted outside. In that scenario, remove the garden soil from the roots and entirely replace it with potting soil. Find out more by reading our repotting guide!
- Hold them apart. You may want to keep your plants separate from any other houseplants you may have for a few weeks after bringing them inside so you have time to monitor and ensure your de-bugging efforts were successful. It’s simpler to treat just your recently relocated plants rather than all of them if you missed any pests.
Once your plants are secure inside, keep in mind that the manner you take care of them will alter depending on the season. Consider plants in the winter as being on the verge of hibernation since their growth will be drastically slowed down due to reduced light and less thirst. Additionally, you typically won’t need to fertilize! Before watering, make sure the soil is at least two down and dry to the touch. For more details, read our watering essentials guide and our watering in the Wally Eco guide.
Your plant babies are now indoors for the winter, where you may enjoy their leaves and preserve them for the next year.
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.