How Cold Can Marijuana Plants Get Outdoors?

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‍Marijuana is a plant that has been cultivated for thousands of years, and in recent years, it has become increasingly popular due to its medicinal and recreational properties. As outdoor growers, one of the most important things to consider is the minimum temperature our plants can withstand. The ideal temperature for marijuana plants is between 70-85°F, but what happens when the temperature drops?

Marijuana plants can tolerate colder temperatures, but the ideal temperature range for growth is between 68-77°F (20-25°C). Outdoor marijuana plants can withstand colder temperatures if not exposed to frost, which can damage or kill the plant. Temperatures below 50°F (10°C) can slow down the growth of the plant and reduce the yield, while temperatures below freezing can cause damage to the leaves and stems. Some strains of marijuana are more cold-tolerant than others. Still, it is generally recommended to protect the plants from cold temperatures and provide them with adequate warmth and shelter if necessary.

In this article, I will explore how cold marijuana plants can get outdoors and what growers can do to protect their crops from the harsh winter weather. We will delve into the science behind marijuana plants’ cold tolerance and the effects that extreme cold can have on their growth and development.

Understanding Temperature Requirements for Marijuana Plants

Marijuana plants are known to thrive in warm and tropical climates, but they can also tolerate colder temperatures if necessary. The ideal temperature for your marijuana plants will depend on the stage of growth they are in. During the vegetative stage, the ideal temperature is between 70-85°F. However, during the flowering stage, the ideal temperature drops to 65-80°F. If the temperature drops below 60°F, the growth of your plants will slow down, and if it drops below 50°F, your plants may suffer severe damage.

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The Effects of Cold Temperatures on Marijuana Plants

When marijuana plants are exposed to cold temperatures, their growth, and development are affected. The first signs of damage are usually visible on the leaves, which will turn yellow or brown and eventually fall off. Cold temperatures can also cause the stems of your plants to become brittle, which can lead to breakage. In addition, cold temperatures can affect the taste and potency of your buds, resulting in a lower-quality product.

Factors That Affect the Cold Tolerance of Marijuana Plants

The cold tolerance of your marijuana plants will depend on various factors, including genetics, age, and the growth stage. Some strains of marijuana are more cold-tolerant than others, so it is important to choose a strain that is well-suited to your climate. In addition, younger plants are more sensitive to cold temperatures than older plants, so it is important to protect them during the cold months. The growth stage is also important, as plants in the flowering stage are more sensitive to cold temperatures than plants in the vegetative stage.

Protecting Your Marijuana Plants from Cold Temperatures

You can take several measures to protect your marijuana plants from cold temperatures. One of the simplest ways to protect your plants is to cover them with a plastic or fabric sheet. This will help to retain heat and protect your plants from frost. Another option is to use a greenhouse or a hoop house, providing your plants with a warm and sheltered environment. You can also use heaters or heat lamps to keep your plants warm, but be careful not to overheat them.

Best Practices for Growing Marijuana Plants in Cold Climates

If you live in a cold climate, there are several best practices that you can follow to ensure the health and vitality of your marijuana plants. Choosing a strain well-suited to your climate is one of the most important things. It would be best to plant seeds or clones in the spring so that your plants have plenty of time to mature before the cold weather sets in. It is also important to monitor the temperature levels regularly and to take action if the temperature drops below the ideal range.

The Importance of Monitoring Temperature Levels

Monitoring the temperature levels is essential to growing healthy and robust marijuana plants. You can use a thermometer to measure the temperature in your growing area, and you should check it regularly to ensure that it is within the ideal range. If the temperature drops below the ideal range, you can take steps to warm up your growing areas, such as using heaters or heat lamps.

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Common Mistakes to Avoid When Growing Marijuana Plants in Cold Weather

There are several common mistakes outdoor growers make when growing marijuana plants in cold weather. One of the most common mistakes is underestimating the importance of temperature control. Another mistake is to plant your seeds or clones too late in the season, which can result in immature plants that cannot withstand cold temperatures. It is also important to avoid overwatering your plants, as this can lead to root rot and other problems.

Tips for Harvesting Marijuana Plants Grown in Cold Weather

If you have successfully grown marijuana plants in cold weather, you will want to know when to harvest them. The best time to harvest your plants will depend on several factors, including the strain, the stage of growth, and the weather conditions. It would be best to harvest your plants when the buds are generally fully mature, and the trichomes are cloudy or amber. You should also consider the weather forecast and harvest your plants before the first frost.


In conclusion, marijuana plants can tolerate colder temperatures if necessary, but it is important to take steps to protect them from the harsh winter weather. By understanding the temperature requirements for marijuana plants, the effects of cold temperatures, and the factors that affect their cold tolerance, outdoor growers can successfully grow healthy and robust plants in cold climates.

By following best practices and avoiding common mistakes, outdoor growers can maximize their yields and produce high-quality buds that are both potent and flavorful.

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