Philodendron likes warm and humid climate and cannot endure extreme temperatures. This means that your plant could be damaged irreparably if exposed to cold winds or scorching temperatures.
The tolerance to temperature of Philodendron varies between species, however it is not able to withstand temperatures lower than 55 degrees Fahrenheit (13degC). Temperatures between 75 and 85degF (24-29degC) as well as 65 to 70degF (18-21degC) are the ideal temperature to this species. The incorrect temperatures are apparent by the appearance of sunscald, curling of leaves and dieback of the shoots, drooping or wilting leaves, as well as leaf fall.
What Temperature Is Too Cold For Philodendrons?
Through their entire existence Philodendrons have flourished in tropical rainforests like those of the West Indies, Brazil, and Mexico in which it is always humid and hot.
If you leave your plant in this condition for a long time can result in injury or damage from cold. The effects of freezing or frost can be deadly for philodendrons.
Make sure your Philodendron is away from vents for air, windows that are open as well as cooling vents and any other drafts of cold air in the space it’s located in.
In the event of prolonged exposure the leaves of your plant will begin to turn dark and then die when it is exposed to temperatures that are lower than 55degF (13degC).
Stunted growth due to injury from cold may also result in brown or dark spots on leaves.
Additionally to that, your Philodendron may be being affected by lower humidity, shorter days and lower levels of light and perhaps overwatering during the winter months.
Be aware that cold drafts could result in significant drops in leaf and result in a naked and unfurled Philodendron that is completely leafless. Additionally, damage from cold could have caused parts of the leaves to turn black.
What Temperature Should Philodendrons Be In?
Every species of philodendron prefers temperatures that are within a certain temperature range. There are more than 200 species.
But temperatures of 65degF (18degC) are perfect for the majority of Philodendrons. It is important to never allow your home’s temperature at night to fall below 55 degrees Fahrenheit (13degC).
In general, it is recommended to maintain your philodendron’s temperature between 75 and 85 degrees (24-29degC). In the evening, it is recommended to maintain a temperature of within 65-70degF (18 to 21°C).
These temperatures, along by high levels of humidity excellent airflow and plenty of moisture, make the perfect conditions for these conditions.
If temperatures fall to the lows of 60 degrees Fahrenheit (15degC) the philodendrons lose much of their vitality and potential for growth.
If temperatures fall below this point for a prolonged period the cells could be in a state of dormancy.
The growth of your plant ceases in this period of dormancy.
It is almost a complete stop of all biochemical processes including photosynthesis, transpiration and respiration.
Philodendron uses this method to conserve energy until the beginning of spring.
Your Philodendron will be faced with a variety of issues when it enters dormancy. It is more likely that you will overwater it, to begin with which can cause root rot, among other problems.
Signs Your Philodendron Has Been Exposed to the Wrong Temperature
Be on the lookout for signs that indicate you’ve been exposed to incorrect temperature.
 Dry or Brown Leaf Margins
The dry, brown edges and tips on the edges of your Philodendron could suggest that it was exposed to temperatures that are higher than normal.
It is often caused by high humidity and direct sunlight exposure.
Stress from heat and excessive loss of moisture cause the leaves’ tips to dry out , and then become crunchy or crisp.
Philodendrons that are dehydrated from being in the hot sun or in dry air will show the same signs.
The tips of the leaves that have been exposed to drafts that are hot may be dry or brown. Be sure that your plant isn’t close to a fireplace, radiator or any vents which move hot air.
The natives of the tropical regions enjoy an extremely high humidity. The soil is able to lose water because of the an increase in evaporation as the temperature increases.
To correct this issue to fix this, you need to move your Philodendron from direct sunlight, hot drafts or hot windowsills.
If the plant is outside, move it to a more shaded area. The best method to avoid burning your plants indoors is to either remove it from the window or put up curtains to block out the sunlight.
Your Philodendron could benefit from an increase in humidity within its surroundings. Misting your plant with water could be an ideal option during the summer’s hot days.
Humidifiers can be a good alternative ( Amazon link). A different option would be to place your pot in a shallow tray filled with wet stones or pebbles.
 Shedding of Philodendron Leaves
The stress of temperature causes the Philodendrons to lose their foliage. If your Philodendron is losing leaves it is because the weather is too hot, cold or cold.
The same effect will be evident the first time you take your philodendron to home in the greenhouse outside garden or even the nursery.
Once you’ve relocated or repotted your plant, adhere to these tips for your first couple of days following.
The positive side is that this is not fatal for Philodendrons. To grow new leaves all you need to do is alter the temperature and other growth conditions.
A balanced liquid fertilizer can aid in rejuvenating your Philodendron throughout the peak of spring and summer months.
It is necessary to place the plant inside a cool, draft-free space in your home in case it’s losing leaves as a result of the frigid temperatures of winter.
 Drooping Leaves
Colder temperatures or cold drafts can cause the medium to be less dry than normal, which can affect the ability of your Philodendron to flourish.
Also, overwatering your plant can result in drooping leaves, when you regularly water it.
The cold damage to leaves of Philodendron cause them to drop and curly. Frost or freezing temperatures have caused damage to cells, and this is what’s happening.
In time, the leaves will begin to wilt because of the decrease in the turgor pressure as well as overall rigidity in damaged cells.
 Browned or Blackened Leaf Surfaces
The excessive heat exposure could cause leaves to change color from black or brown , and crisp on the outside So be vigilant.
Direct sunlight typically causes darkened leaves. For instance, if you place your Philodendron in the scorching summer sun the leaf tissue could be damaged by excessive heat.
If you do not leave your plant in this condition for a long time, those black spots will develop.
As I’ve observed, this is usually the case with plants I’ve left for a long time near and on windowsills of west- or south-facing windows.
Plants that are directly in the path of radiators, air vents or fireplaces, as well as central heating will more often grow leaves that are black. A slower growth rate and a decrease in leaf size is expected to occur as a result.
Take off any leaves that are completely blackened. Utilize cooling fans or relocate your Philodendron away from the path of direct sunlight to maintain its health.
 Curling of Leaves
Curled leaves are often associated with the edges of leaves that are dry and brown. Most often, curly leaves of philodendron can be traced to sunlight, dehydration of water and exposure to excessive temperatures.
The majority of philodendron species aren’t used to the extreme temperatures of intense sunlight.
Thus, it’ll be able to show indications of temperature shock and sun damage.
It is best to stay clear of the sun during summer months, but a bit of winter sun isn’t an issue.
The appearance of scorched or sunburned leaves of the philodendron is the most obvious indication of excessive heat. Sunscald is identified by browning of leaf edges and the yellowing of the edges and tips.
In general the newest delicate leaves and shoots are more prone to sun-scorch than mature leaves.
Any leaves exposed to direct sunlight eventually fade and turn to bleach.
It is recommended to relocate your Philodendron inside or to an area that is shaded in your house if it is sunburned. The leaves that are sunburned will not regenerate, so it’s recommended to get them removed.
 Leaf Yellowing and Die Back
Overexposure to heat and direct sunlight are the most likely factors to be the cause of yellowing leaves of philodendron.
Unfortunately, this is often the case in the absence of a appropriate or gradual adjustment.
Infestations, overwatering and deficiencies in nutrient levels can also lead to the philodendron to yellow and die back leaves, as well as extremely cold or hot temperatures.
How Do You Take Care of a Philodendron During Winter?
Frost and cold temperatures in winter can cause severe damage to the philodendron plant.
They’ll probably go into dormancy until the beginning of spring, when temperatures drop lower than 55 degF (10degC). It’s likely that you want to see your beautiful greenery flourish as a keen gardener.
It is essential to keep your the philodendrons indoors if you reside outside of USDA Zones 10b through 11.
They’ll be fine, and may even thrive in the right place at home during the winter months.
The positive side is that philodendrons are able to adapt quickly to indoor living.
To ensure that your plants are properly taken care of during winter months, there are some things you should be aware of:
- Reduce frequency of watering The plant will require lesser and less water when the temperature becomes cooler and the days become shorter. If the top 2 inches of the soil is dry, you can only water the soil.
- Remove unhealthy areas Take away any branches and the yellowing foliage of your Philodendron prior to taking it inside.
- Be sure to look for any signs of trouble Make sure to thoroughly inspect your plant before taking it inside to make sure that there aren’t any pests or decaying parts of your plant.
- Be sure to keep it out of drafts: If you can avoid windows and doors that are open as well as air ducts, windows, radiators and cold floors that could all contribute to drafts.
- Stop fertilizing: It is recommended to only fertilize your plants every year. Feeding it fertilizers in the winter months is not a good idea.
- Consider investing in grow lights for foliage Keep your philodendrons in bright lighting is the best way to prevent dormancy. LED grow lights are an excellent alternative in this scenario.
- Keep the proper humidity levels and air circulation: Make sure that your facility has enough ventilation. Bring in moisture by using an humidifier or pebble tray.
Can Philodendrons Be Left Outside?
If temperatures do not fall below 60 degrees Fahrenheit (15degC) You can keep your philodendrons in the sun in.
I usually bring my plants outside during summer since we are in a warmer region.
However, first I must determine whether the temperatures at night stay at or above 60 degrees F.
If it’s always cold it’s time to bring in your philodendrons.
The tropical plant is ideal for backyards and patios in USDA Hardiness Zones 10B to 11 where they can flourish. (Source: University of Florida)