By Steven Voser

Like all things, growing cannabis in a tent has its advantages and challenges. One of the biggest challenges is managing the temperature, especially during the summer. In warm conditions, grow tents can quickly become hot and stuffy, which can affect the health of your plants. In this article, we'll teach you how to keep your grow tent cool during the summer months to ensure you harvest the best weed possible.


Why Grow Room Temperature Management Is So Important

When we grow cannabis indoors, we need to take the reins and closely monitor the conditions in our tent/room to ensure our plants can achieve their full potential. Temperature, in particular, is very important to the health of cannabis plants; when temperatures fall outside of the ideal range for cannabis (outlined below), many of the plant's biological processes slow down, affecting its ability to grow.

Moreover, high temperatures, in particular, can create a breeding ground for pests, which, if not controlled, can severely impact the health of your plants. When temperatures rise, humidity often does too (because hot air can hold more moisture than cold air), which can also promote the growth of fungi and other pathogens that can ruin an entire harvest very quickly.

Video id: 266470360

What Is the Best Temperature and Humidity for Indoor Cannabis?

Cannabis grows best when provided with ideal temperatures and humidity levels for each phase of its life cycle. When growing weed indoors, keep the temperatures and humidity levels in your tent/room within the following ranges to maximise the health of your plants.

Seedlings

  • Seedlings and clones respond best to humidity levels of 65–75% RH, as their root systems are not yet well-established. Clones and young plants take in moisture through their leaves.
  • Room temperature with lights on should be 20–25°C. Lights off: 15–20°C.

Vegetation

  • During vegetation, lower the humidity by 5% per week. Between 40–70% RH is acceptable. Roots are now established and the plants are beginning to transpire.
  • Room temperature with lights on should be 22–28°C. Lights off:18–22°C.

Flowering

  • During flowering, low humidity is important. Decrease to 40–50% RH. Over 60% can mean slowed growth and increased pathogen risk.
  • Room temperature with lights on should be 20–26°C. Lights off: 16–22°C. The goal is to imitate fall, so temps need to be kept low.

Late Flowering

  • During late flowering, improvements to overall quality can be achieved by keeping temperature and humidity as low as possible. Humidity under 40% RH is ideal.
  • Room temperature with lights on should be 18–24°C. Increase the difference between day/night temps by up to 10°C for best results.

Humidity and Temperarure in Every Stage

Cooling a Grow Tent: Effective Strategies to Lower Temperature

How you choose to go about cooling your grow room/tent will vary depending on the particular weather conditions in your local region and your home.Choosing the right tent setup is crucial. A well-designed growing tent kit can help regulate temperature and improve airflow, making it easier to maintain ideal conditions.  If you live in a more temperate region, you may need to do very little to manage the heat in your grow room. The same goes if you keep your tent indoors in an already cool space.

If, on the other hand, you live in a region with hot summers and/or the space where you've set up your tent is prone to summer heat, you'll probably need to take more drastic measures to ensure the temperatures in your space stay optimal. Some of these measures may drive up the running costs of your tent, which may, in turn, affect your decision to grow indoors over the summer.

Below, we'll walk you through a range of passive and active measures to help you manage grow room heat.

Passive Solutions to Manage Grow Tent Heat in the Summer

  1. By nature, electronics generate heat. Besides your grow light, we recommend keeping as many electronics (such as ballasts, motors, pumps, and timers) outside of your grow tent. Not only will this minimise the amount of heat in your tent/room, but you'll likely also find that keeping your electronics in one place is very convenient, allowing you to observe all of the electronic aspects of your grow-op at a glance.
  2. Set up your tent in a room/area of your house that receives little or no direct sunlight. If you have no choice but to keep your plants in a room with lots of direct sunlight, use blackout shades to keep out as much light as possible.
  3. Source the air for your intake fans from a cool place, and keep your exhaust outlets outside of the room you're growing in. Ideally, try to vent the air from your exhausts outdoors or at least into another room (not the room that your tent is in). The heat from a 400W HPS or MH light will heat any standard-size room very quickly.
  4. Grow at night. Make your day cycle during the night. Expect a 10–15°C difference in ambient air temperature at night.
  5. Use rolls of flexible insulation to cover your grow tent and insulate it from the conditions in the rest of your home. If you're building a dedicated grow room, investing in insulation is a must.

NIght Growing

Active Solutions to Manage Summer Heat in Your Grow Tent

  1. First and foremost, use a thermometer and hygrometer to closely monitor the temperature and relative humidity in your grow space.
  2. Use cooled grow light reflectors. Not only will they help to direct light back onto your plants, maximising their growth, but they'll also help to mitigate some of the heat produced by your lights. Grow light reflectors are fairly inexpensive and a solid option for any grow room.
  3. Consider installing a dimmable ballast. Periodically dimming the wattage of your grow lights can reduce the heat emitted without interrupting the growing cycle.
  4. Invest in fans and keep air circulation high. Still air is the enemy of cannabis and greatly contributes to the heat inside your grow room/tent. Always keep oscillating fans working both above and below your canopy, especially when growing multiple plants at a time. Position your fans to create a cross-breeze in your tent, ideally in a way that directs air from your intake ducts to the exhaust. Consider investing in larger fans if need be. It is more efficient to run larger fans on lower settings than to max-out smaller fans.
  5. Use air conditioners and dehumidifiers to cool your grow space.

Fan and cannabis growth

Mitigating the Costs of Managing Grow Tent Temperature and Staying Sustainable

Keeping a grow tent or room cool in summer obviously comes at a cost. Grow lights already consume a considerable amount of energy, and running additional oscillating fans, intake and outtake systems, and/or air conditioners/dehumidifiers can dramatically increase the overall cost of your grow operation.

How much this affects you will depend on your budget. If you're very budget-conscious, you may want to consider operating your grow tent from fall through spring when temperatures are cooler and you don't have to worry so much about cooling. If you're not worried about the added costs of cooling your tent or room, we still think you should consider ways to minimise the energy footprint of your grow-op, by looking into things like:

  • The passive solutions listed above. Before going out and spending extra money to buy and run more grow equipment, see if there are easier and less energy-intensive options available.
  • Sustainable growing practices. While you might not be able to get around installing fans to cool your tent, there may be other things you can do to offset the environmental footprint of your grow-op.
  • Going organic. Organic cannabis cultivation not only produces superior bud, but it's a lot more cost and energy-efficient than you might think. Just like improving the energy efficiency of your grow tent/room can help offset the costs of your operation, so can implementing organic grow techniques.

What Temperature Is Too Hot for Cannabis?

Mature cannabis plants typically like daytime temperatures of 20–30°C (70–85°F) and night-time temperatures of roughly 10°C cooler. While most cannabis varieties can handle slightly higher temperatures, prolonged exposure to temperatures above 35°C/95°F will impact the growth of your plants, just like cool temperatures will.

How to Spot Heat Stress in Cannabis Plants

Be sure to protect your cannabis plants from heat stress throughout their life cycle. Over time, heat stress will manifest in the form of visible signs of unhealthy growth. As outlined below, the signs of heat stress can vary slightly depending on your plants’ stage of growth.

Heat Stress Symptoms in Cannabis Seedlings

Seedlings are very vulnerable and will usually die if exposed to heat stress for prolonged periods. Here are the main symptoms of heat stress in seedlings:

  • Stunted growth
  • New leaves look pale and wither quickly
  • Wilting

Heat Stress Symptoms in Vegetative Cannabis Plants

  • Curled and cupped leaves
  • Dry, withering leaf edges
  • Brown spots on fan and sugar leaves, especially near the top of the plant (if left unaddressed, lower leaves may also turn brown and wither)

Heat Stress Symptoms in Flowering Cannabis Plants

  • Bleached-looking, yellowing leaves
  • Curled leaves
  • Foxtailing
  • An unusual amount of white stigmas at harvest time
  • Light, airy flowers with little resin and smell

Heat stress

Summer Lovin'

Summer is naturally cannabis' season to thrive. Unfortunately, growing in the confines of a tent or room can be challenging during the summer months, especially if you live in a hot region. Luckily, by using a combination of the passive and active approaches to managing grow tent heat discussed here, your summertime indoor grow should go smoothly. Happy growing!

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Privacy Policy - Royal Queen Seeds

To ensure a safe online environment and guarantee adequate data protection, we strictly comply with all legal requirements. In this privacy statement, we provide information about how and for what purpose data is collected, safety measures, storage periods and contact details.


COMPANY NAME: SNORKEL SPAIN, SL (hereinafter ROYAL QUEEN SEEDS)

C/ Vilar d'Abdelà, 5 (nave 1) CP: 08170 de Montornès del Vallès

+34 937 379 846

support@royalqueenseeds.com


The present Privacy Policy sets out the terms on which we will treat personal data at ROYAL QUEEN SEEDS; this includes any personal data collected through our website https://www.royalqueenseeds.com/ as well as any other data we process in the course of our business activities.

ROYAL QUEEN SEEDS collects the following personal data for the purposes listed below:

SECTION 1 – PERSONAL INFORMATION WE COLLECT

1.1 Account purchases

Account purchases can only be made if you are in possession of a personal account. When you create an account or purchase something from our shop, as part of the buying and selling process we collect the following personal information that you provide to us:

This information is required for delivery. In addition, when you browse our shop, we automatically receive the Internet Protocol (IP) address of your computer. Based on this information, we can optimise your online experience and at the same time protect our online environment.

Purpose of data collection

We collect and store account-related data for the following purposes:

(a) to carry out obligations arising from any contracts between you and us, and to provide you with information, products and services that you may request from us;

(b) to set up, manage and communicate with you about your account and your orders;

(c) to conduct market research and analysis;

(d) to confirm your age and identity, and to detect and prevent fraud.

1.2 Newsletters

With your explicit permission, we may send you newsletters about our shop, new products and other updates. We send newsletters based on your explicit consent. In the event that you purchase a product, and in accordance with current regulations, we may send you commercial communications in accordance with the legitimate interest of our company, always about products or services similar to those you have purchased or contracted. In any case, you may exercise your right of opposition through the channels announced in this Privacy Policy. The following information is collected in relation to the newsletter:

We do not need to know the sex of the person in order to send the newsletter (data minimisation: by law we must ask for data that is strictly necessary to provide the service, and in this case knowing the sex is not necessary to send the newsletter).

Purpose of data collection

The data collected is used to:

(a) personalise our emails, including your name and gender;

(b) provide gender-specific content.

You can withdraw your consent at any time by using the link provided in the newsletter or the contact information provided in section 2.

1.3 Customer service and contact form

In order to provide appropriate support, our customer service employees have access to information related to the account. Consequently, their support will be highly effective and friendly. The data provided in our contact form is used by our CRM provider, SuperOffice. We will only use your details to respond to your message.

SECTION 2 – LEGITIMATE INTEREST

If you have purchased any of our products, please note that we may process your personal data for promotional purposes, based on Royal Queen Seeds' legitimate interest only to offer you products or services from our company and about products or services similar to those you have purchased. You may exercise your right to opt out of future messages by the means set out in this Privacy Policy or through any notification you receive.

2.1 How do you withdraw consent?

If you change your mind, you can withdraw your consent for us to contact you for the purpose of collecting, using, or disclosing your data at any time by reaching out to us at: support@royalqueenseeds.com.

SECTION 3 – DISCLOSURE

We may disclose your personal information if we are required to do so by law or if you breach our Terms of Service.

SECTION 4 – HOW LONG DO WE KEEP YOUR DATA?

At Royal Queen Seeds, we will not retain your data for longer than is necessary for the purposes described in this Policy. Different retention periods apply for different types of data; however, the longest period we will normally hold any personal data is 10 years.

4.1 Account information

Data relating to the account remains relevant for as long as the consumer is in possession of an account. Therefore, the data remains documented for as long as the account exists. When our customers delete an account, the associated data will be deleted within a reasonable period of time. Requests regarding the inspection or correction of stored personal data or the deletion of an account can be sent to support@royalqueenseeds.com.

4.2 Newsletters

In the event that you give us your consent to inform you about our products or services, we will keep your data until you express your wish not to receive any further communications from us. However, we regularly (every month) carry out a relevance check. Registered customers (and their personal information) will be deleted whenever customers do not reply to our request. In addition, our newsletter mailing has an opt-out feature. Consumers can withdraw their consent by using this opt-out feature.

SECTION 5 – COOKIES

Cookies are small information files that notify your computer of previous interactions with our website. These cookies are stored on your hard drive, not on our website. Essentially, when you use our website, your computer displays its cookies to us, informing our site that you have visited before. This allows our website to function more quickly and remember aspects related to your previous visits (such as your username), making your experience more convenient. At Royal Queen Seeds, we use two types of cookies: functional and analytical.

5.1 Functional Cookies

Functional cookies are used to enhance your online experience. Among other things, these cookies track what is added to your shopping cart. The use of these cookies does not require prior authorization.

5.2 Analytical Cookies

Analytical cookies are used for research and market analysis. The data collected with these analytical cookies is anonymous, making it unusable for third parties. The use of these cookies does not require prior authorization.

SECTION 5 – THIRD-PARTY SERVICES

Third-party services are required to conduct transactions and provide our services. In general, the third-party providers we use will only collect, use and disclose your information to the extent necessary to enable them to perform the services they provide to us.

However, certain third-party service providers, such as payment gateways and other payment transaction processors, have their own privacy policies regarding the information we must provide to them for your transactions.

We encourage you to read the privacy policies of these providers so that you can understand how these providers will handle your personal information.

In particular, certain suppliers may be located or have facilities located in a different jurisdiction than yours or ours. Therefore, if you choose to proceed with a transaction involving the services of a third party, your information may be subject to the laws of the jurisdiction in which that service provider or its facilities are located.

Once you leave our website or are redirected to a third-party website or application, you are no longer governed by this Privacy Policy or the Terms of Service of our website.

Web analytics service (anonymous data)

On this website we have integrated an element of a web analytics service (with anonymisation functionality). Web analytics can be defined as the gathering, processing and analysis of data about the behaviour of visitors to websites. An analytics service collects, among other things, data about which website a person came from (the so-called referrer), which sub-pages they visited or how often and for how long they visited a sub-page. Web analytics is mainly used for website optimisation and for a cost–benefit analysis of internet advertising.

Courier service

To complete deliveries we use a courier service. This courier service carries out the delivery between our company and the consumer's home. To complete these logistics, the company requires access to the consumer's name and address information.

Mailing service

Royal Queen Seeds uses a third-party mail service provider to send its newsletter. This provider has access to limited account information related to opt-in consent (e.g. email address).

Marketing services

Royal Queen Seeds has the support of a company that specialises in marketing and communication activities. Their access to personal information is very limited and mostly anonymous.

Payment services

At Royal Queen Seeds we use external payment services to handle our transactions (e.g. credit card payments).

SECTION 6 – SECURITY

To protect your personal information, we take reasonable precautions and follow industry standard best practices to ensure that it is not inappropriately lost, misused, accessed, disclosed, altered or destroyed.

If you provide us with your credit card information, the information is encrypted using secure socket layer technology (SSL) and stored using AES-256 encryption. Although no method of transmission over the internet or electronic storage is 100% secure, we follow all PCI-DSS requirements and implement additional industry standards that are commonly accepted. Information related to the account is protected with a hashing method. This method transforms the information into a generated hash. As a result, confidential information is protected and invisible, even to us. In addition, our databases are exceptionally protected against unauthorised access. For example, access to the database is only possible and permitted via approved IP addresses (e.g. from Royal Queen Seeds headquarters). Other attempts and addresses are rejected at all times.

Furthermore, data is anonymised as much as possible, so it cannot be directly linked to a specific consumer. With this data, however, we may be able to carry out market research and analysis. In addition, the third parties concerned (e.g. mailing service) are examined prior to our collaboration, comply with the GDPR from the EU and receive a processing agreement. Within Royal Queen Seeds, employees are assigned different access permissions. Specific permission provides access only to information that is strictly required to perform a task. Digital security measures are subject to change and must meet high requirements to ensure the safety of online customers. That is why, at Royal Queen Seeds, we appoint a security officer. Regular verification and improvement of security measures (where necessary) are part of the role.

SECTION 7 – CHANGES TO THIS PRIVACY POLICY

We reserve the right to modify this Privacy Policy at any time, so please check back regularly. Changes and clarifications will be effective immediately upon being published on the Website. If we make substantial changes to this policy, we will notify you here that it has been updated so you will know what information we collect, how we use it and under what circumstances, if any, we use and/or disclose it.

SECTION 8 – YOU HAVE THE RIGHT TO: