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Is 60 degrees too cold for cannabis seeds

Temperature Problems And Marijuana Plants

Marijuana plants function the best when their surroundings maintain a consistent temperature between 70 and 75 degrees Fahrenheit during the daytime, and 50 and 60 degrees Fahrenheit at night. This ideal temperature can sometimes vary, however, such as when growers add carbon dioxide to their plants, then the best temperature is right below 85 degrees Fahrenheit.

Anything below 60 degrees Fahrenheit is going to cause problems for your marijuana plants – especially if it continues too long and if it’s during the plant’s flowering phase. This can cause problems with your resulting harvest, so it’s important to pay close attention to the temperature surrounding your plants.

With outdoors growing, you should know that they most likely will experience a night or two of as low as 50-degree temperatures. Do not fear: this should not cause long term problems for your plant and its harvest. Marijuana plants are impressively robust, but of course it is still a good idea to keep the environment within the ideal temperature range whenever possible. That being said, if the temperature gets lower than 40 degrees Fahrenheit, there will be trouble for your plant.

Cold temperatures generally cause things to slow down. Your marijuana plants won’t produce yields that are as high as normal due to the delayed growth, although you may not recognize this if it is your first season with this particular plant.

Cold Problems in your Cannabis Grow

When dealing with too much cold, there are some specific steps you can take to deal with its effects on marijuana plants. These methods can vary for indoor and outdoor growing areas. If you are an outdoor grower, you could give a gas patio heater a try. This is especially useful for the night when temperatures are even colder. You should aim for a consistent temperature of 60 degrees, so get as close to that as you can. Another option for outdoor growers is to cover them to provide insulation – try one made out of polyethylene plastic. If you grow in containers you can place them inside during cold nights.

If you are growing indoors, try a CO2 generator or electric heater to help balance things out. For big indoor setups, go for a hot water heater that recirculates the water throughout the garden. And make sure to download my free marijuana grow bible at this link here for more growing tips.

Heat Problems in your Cannabis Grow

The cold is not the only thing that might have adverse effects on your marijuana plants – the heat can be just as troublesome. Plants that are overheating will show the earliest signs in their leaves with curling or burnt appearances.

Your plants should not have too much trouble with random bouts of heat if they are mature and have developed sizable root systems, therefore allowing them to take in more water despite the heat. If temperatures are somewhere between 80 and 90 degrees and your plants are in their vegetative state, however, you might see the development of stems that are longer and leaner than normal. Read more about the perfect temperature in the article ‘What Is The Ideal Temperature For Growing Marijuana Plants?’

If you are growing your plants indoors and the grow lights are causing the temperature to be too high, then during the flowering phase, buds that are highest (or closest to the light) will be bleached and stretched out. Your plants will have burnt tips as well, but the problem with the buds is the best way to see that it’s an issue with excess heat, not light. Other signs include yellowing, brown spots, and curling leaves. Plants that aren’t receiving enough water have a higher chance of succumbing to heat stress. More tips in my free grow bible at this link here.

How To Fix Heat Problems

To keep things cool indoors, you can install a ventilation fan as well as air conditioning, or else air or water-cooled lights to ensure a lower temperature despite the light intensity. Only focus on the heat that is touching your plants, since that is the only thing that will have an effect on your plants. Exhaust fans work well to dump the heat from your garden outside – just be sure to use a carbon scrubber to make sure the smell of your garden is not launched outside with the hot air.

One simple way to fix the problem is to move the light further away from the plants. Loon-watt lights are supposed to be three feet away from your plant, air-cooled lights should be between 18 and 24 inches from your plants, and water-cooled lights can be the closest: within a foot away from your plants. If you are growing outdoors and there is a heat spell, there are a number of ways to go about cooling down your marijuana plants. For instance, micro-sprayers are a good way to have significant reductions in heat – they could lower the temperature on your plants by as much as 30 degrees Fahrenheit.

Make sure to download my free marijuana grow bible at this link here for more growing tips.

If your plants are growing in containers, heat will have a more devastating effect on them. Try moving the plants out of direct sunlight to help combat excessive heat; otherwise, put them into a lighter-colored container instead because it will reflect sunlight.

To prevent heat stress from the beginning, shift your watering times to before and after the hottest part of the day – early morning and late evening, for example. This will allow your plants to absorb the water without it evaporating quickly. If need be, you can cover up your garden with a sheet in order to provide them with shade – but don’t make this a long term change, or else it will cause them to go into shock from the sun when the cover is removed.

For marijuana plants healing from heat stress, try using seaweed kelp extract to ensure that they do return to their former strength. It also serves as a preventative measure and will help keep your plants from getting heat stress again in the future.

Tips for Growing Cold-Weather Cannabis

Here are some tips for growing cold-weather cannabis. Growing high-quality cannabis is usually a warm-weather activity.

Outdoors, cannabis plants grown from seed germinate in the spring, and the seedlings grow steadily throughout the spring and summer months until they flower in late summer and fall. Mild temperatures keep the plants thriving and growing steadily.

Outdoor crops grown from clones differ in minor ways. Since clones are usually placed in a grow environment when they are at least several inches tall, their temperature needs are only slightly less specific than those of a recently sprouted seedling.

This demands meticulous care and watering until it hits its stride with regard to vegetative growth. Both seedlings and young clones benefit from temperatures on the warmer side of the thermal gradient and also benefit from higher humidity at this age than at any other time during their life cycle.

To properly understand the possibilities and considerations for growing cold-weather cannabis, it’s important to know what ideal cannabis cultivation temperatures are, and why deviating from them to grow a colder winter crop is a challenge, although possible.

Ideal Growing Temperatures

One of the most important factors when growing cannabis is temperature. Temperature is critical to a plant’s photosynthesis and transpiration processes, which help with physical growth, nutrient absorption, and resin production.

Generally, a cannabis plant prefers temperatures between 77º and 86º F during the day. During the night, they can handle temperatures between 63º and 65º F.

Temperatures outside of these ideal temperature ranges can make your plants susceptible to a variety of development issues.

Vegetative Stage

The ideal temperatures for robust growth and healthy young plants fall between the 70- to 85-degree (Fahrenheit) range.

Seedlings and young plants in the vegetative phase of growth do not respond well to wide temperature fluctuations and appreciate consistent warmth—much like sativa plants in the equatorial regions of the world enjoy consistently warm environments.

In temperate regions of the United States and other parts of the world, cannabis thrives and grows at its most rapid rate during the toasty days of summer, when temperatures remain high.

Flowering Stage

During the flowering stage of growth—which occurs outdoors when days grow shorter in late summer and fall—the optimum temperature level reduces slightly to about 65-80 degrees to coincide with shorter days and the sun sitting lower in the sky.

Temperature fluctuations that do not exceed more than 10 degrees between daytime and nighttime are ideal. Although warmth this steady is difficult to maintain even in the most cannabis-friendly climates, it makes a good benchmark for what cannabis needs for perfect plant development and growth.

Late Flowering/Pre-Harvest Stage

In the late flowering and pre-harvest phase of plant growth, which outdoors occurs in the fall, temperatures in the 60- to 75-degree range are ideal.

Those who grow cannabis outdoors are limited in their ability to control their regions’ climates; their best course of action is to grow their crop in a steadily warm area—which is the reason areas like California are the most advantageous for outdoor cannabis cultivation.

What Happens to Cannabis in Extreme Temperatures?

When temperatures fall below 60 degrees or above 90 degrees, plants do not respond favorably. Lows and highs outside of the ideal range interrupt plant growth and development.

At temperatures that are too low, optimum photosynthesis no longer occurs. Plant growth slows, and overall vigor decreases. In extreme cases of extremely low temperatures that approach freezing, cannabis plants will perish. In extremely cold weather, the plant’s roots are the first to suffer.

As temperatures drop, your plant’s metabolism will slow down making it harder for the roots to absorb oxygen, nutrients, and water from the soil. In the end, plants that do not get enough food and water can become stunted or begin to wilt.

In some cases, cold weather may trigger hermaphroditism. Hermaphrodite marijuana plants are plants that have developed female buds and male pollen sacs. If you don’t monitor for these hermaphroditic traits, you may risk self-pollinating your plants, which can significantly lower your yields.

A similar situation occurs in environments with extreme heat. Plant growth slows, and vigor decreases. Overly hot temperatures result in curled or cupped leaves. The plants will begin to turn yellow and lose the vibrant green seen in healthy cannabis plants.

In growing environments that are either too hot or cold, cannabis is also more susceptible to pests and disease—particularly if the grow area has excessively high humidity. Mold, white powdery mildew, spider mites, and root rot are more of a threat when plants are vulnerable due to improper temperatures.

Mold, in particular, can develop if there is excess moisture in the air. Excess rain, snow, and frosts can land on the plant’s foliage creating a perfect breeding environment for mold.

If you do not monitor your plants for mold, they can begin to rot before you are ready to harvest. Invest in a hygrometer to test the relative humidity of your soil and growing environment.

If the plants are flowering, trichome production reduces, and overall potency will not reach optimum levels. In cold temperatures, many cannabis plants will develop visually pleasing purple coloration due to their increased anthocyanin concentrations.

This is a different situation from strains that assume a purple hue due to their genetics. Purple due to overly cold temperatures is a sign that the plant would benefit from additional warmth.