Did you know that marijuana plants tend to like the same temperatures humans prefer? Sure enough, cannabis is a hardy crop, but if it gets too hot or too cold for you, chances are your plants will feel the same. There’s a bit more to finding the ideal cannabis temperature, though, so we wrote this blog to tell you all you need to know to establish the perfect weed growing climate.
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Ideal Cannabis Temperature
It’s not hard to see that cannabis plants will grow and flower to full potential within a certain optimal temperature range. In fact, all life thrives only at the right temperatures. To be fair, we humans are a bit of an exception, since we build comfortable homes with heating and air conditioning. Your cannabis seeds, by contrast, need your help to flourish at the ideal cannabis temperature.
Failure to regulate heat and cold in your grow environment can be disastrous for your plants and their harvest potential.
Effects Of Low Temperatures On Your Grow
If you have a grow room, tent, or other indoor cannabis garden where temperatures regularly fall below 15°C, you run the risk of slowing down growth processes. Sub-zero conditions may even prove fatal for your crop. Even though your plants may not show any signs of cold-related stress, they are bound to slow down their development and produce less bud to harvest.
Cold conditions tend to worsen when they coincide with high air humidity. They increase risks of mould. Moreover, low and irregular temperatures can cause changes in leaf pigment composition. These in turn may impair photosynthesis, choking off critical energy supplies. Indoor grows tend to be more vulnerable to unstable and low cannabis temperatures than outdoor projects.
Too Much Heat
High temperatures can impair normal growth in their own particular way. In the flowering phase in particular, temperatures over 26 degrees can compromise bud development. Colas tend to become less compact and more open-structured, while bud fragrance and potency may also suffer from the heat.
If your grow room gets too warm, other problems may arise too, including pests, rot, and mould. Examples include rotting roots, powdery mildew, and mites. Your plants will signal their distress through discoloured, curled-up leaves and signs of stretching.
Optimal Cannabis Temperature For Indoor Growing
Your plants have different temperature needs as they move through the vegetative and reproductive stages of their life cycle. You should take these needs into account to raise your seeds to full potential.
Growth Phase
Juvenile plants can take a bit of heat. Throughout the growth phase or vegetative stage, optimal cannabis temperature ranges between 20 and 30°C. Try to avoid low air humidity at this point, as your young plants grow fastest in intermediate to high humidity and high temperatures.
The bigger your plants get, though, the better they learn to cope with temperature and moisture fluctuations in their environment. It can also be helpful to allow your cannabis temperature to drop a bit at night, as long as you stay within the recommended 20 to 30-degree range.
Flowering Phase
The flowering phase begins once your plants begin to develop their flower buds. During this stage, slightly lower temperatures are preferable; preferably somewhere between 18 and 25°C. Although your plants do not strictly need this cooldown, it does add to premium bud quality.
Particularly during the second half of the flowering phase, low cannabis temperatures can contribute to spectacular bud colours, increased trichome production, and fragrant aromas. While you’re a it, try to keep average air humidity low and keep night-time temperatures lower than daytime values.
The Link Between Cannabis Temperature And Humidity
We have already mentioned air humidity above, and that should be no surprise, since perfect cannabis temperature and moisture levels are interconnected. Usually, problems with one of these parameters can be solved by adjusting the other. Air humidity indicates the amount of moisture the air can contain.
We often hear experts talk about relative air humidity. This indicates the amount of water present in the air at a given temperature, compared to the overall maximum holding capacity.
The important thing to remember here is that warm air can contain more moisture than cold air. That means both temperature and humidity are important to track. Controlling both gives you optimal control over your grow environment.
How Do You Manage Perfect Cannabis Temperature?
Now you know the best cannabis temperature for all stages of your grow. So how do you make sure you achieve and maintain them in your grow room? Luckily, it’s not that hard to do, as you will find out below.
Your first step should be gaining insight into the actual cannabis temperature in your grow room. You can use a regular thermometer for it, but you may want to invest in a combined thermometer and hygrometer so you can check air humidity using the same device.
Next, you need to do something with the data you gather: your grow room can be either too hot or too cold. So how do you get the perfect cannabis temperature? Easy. Just keep the minor adjustments bellow in mind to stay in full control of your indoor grow climate.
Lowering High Temperatures
If your grow room gets too hot on a regular basis, you have plenty of options to get temperatures to drop. The first thing to arrange is a decent air exhaust system to expel hot air from the room. In addition, you should consider adequate ventilation to keep air circulation up to speed. Fans are the easiest way to sort this, particularly the swivel or oscillating type fans. Stagnation in airflow can trap the air in certain zones, which could damage your plants.
Another way of reducing heat buildup is adjusting your lighting. If your grow room gets too hot during the daytime, you could consider turning down your grow lights, or to replace them with fewer, smaller, or more heat-efficient ones. Led lighting usually has a lower heat signature than other types; plus they can save you serious expenses on power consumption throughout your grow.
As an alternative option, air conditioning can be a real gamechanger for lowering grow room temperature.
Increasing Your Cannabis Temperature
If your indoor garden tends to get too cold rather than too hot, the obvious first step would be installing some sort of heater. If you decide to do so, make your heating system does not blow hot air directly onto your plants, as this will probably do more harm than good. There are alternatives, too: installing more heat-emitting grow lights could help, for instance. Cool grow rooms can often benefit from improving insulation, which can be done in various ways depending on the layout of the space. This comes with the big bonus of saving on your energy expenses while you look after your plants.
As you can see, managing the perfect cannabis temperature is not as easy as it may seem at first. Still, keeping some degree of control is not that hard to achieve. A few simple adjustments will get you a long way towards establishing ideal climate conditions for growing weed.
Give Your Next Cannabis Seeds A Warm Welcome
Now you know what you need to keep your grow room at perfect cannabis temperature. Time to order the hottest cannabis seeds that match your taste and get cracking, then!
Order The Hottest Cannabis Seeds Online
Maintaining the right cannabis temperature is every bit as important as giving enough water, nutrients, and light; but there’s always more to learn about the best ways to make the most of any cannabis seeds you grow. Just leaf through our selection of Grow Blogs to find all the best techniques, tricks, and insights. That way, you can grow your grow knowhow while your plants flourish in perfect cannabis temperature conditions!
