By Steven Voser

How to grow cannabis outdoors in Spain, month by month in 2025.

Contents:

Spain is one of Europe’s top tourist destinations, especially during the summer. But the warm, sunny weather isn't just great for sunbathing; Spain also boasts the perfect conditions for growing weed outdoors.

If you live in Spain and want to grow your own outdoor weed, keep reading; below you’ll find a month-by-month walkthrough of how to grow cannabis in Spain.

IS WEED LEGAL IN SPAIN?

The commercialisation of cannabis remains illegal in Spain. However, adults can legally consume and cultivate cannabis in a private space as long as they do so for personal use and keep their plants out of public sight. Consuming, buying, or possessing cannabis in public is not a serious offence, but a misdemeanour punishable by a fine.

In Spain, autonomous communities have limited control over their local laws. In 2017, Catalonia legalized the cultivation, consumption, and distribution of cannabis via registered cannabis clubs. These clubs must be self-sufficient non-profit organisations, can only produce 150kg of dried weed per year, and must follow certain regulations in order to comply with local laws.

THE DIVERSE CLIMATES OF SPAIN

Spain is Europe’s most climatically diverse country, combining 13 different Köppen climates. Hence, summer in Spain can be very different from one region to another.

Northern Spain has an oceanic climate characterised by warm summers with plenty of rainfall. Temperatures peak at 23–26°C and rainfall averages at about 7 days per month. Make sure to keep an eye on the rain in these areas, as it can cause problems with pests and plagues.

Continental or mainland Spain, on the other hand, boasts some of the hottest summers. Summer highs in Cordoba, for example, range from 32–36°C, while Madrid experiences peak temperatures of 28–33°C. These areas also get very little rain, so you’ll want to keep that in mind when planning your watering schedule.

Mediterranean Spain, on the other hand, has milder summers with scarce rainfall. Barcelona and Valencia, for example, boast summer highs ranging between 27–30°C. Meanwhile, temperatures on Spanish islands vary greatly. The Canary Islands, for example, are known for having warm temperatures all year round, with summer temperatures reaching the mid-20s. The Balearics, on the other hand, have much hotter summers peaking at about 30°C.

A GUIDE ON GROWING CANNABIS OUTDOORS IN SPAIN

A MONTH-BY-MONTH GUIDE ON GROWING CANNABIS OUTDOORS IN SPAIN

In Spain, the outdoor cannabis growing season firmly starts in May. If you want to grow larger plants with lots of foliage, you’ll want to germinate your seeds indoors in April. Harvest time is in late October, although this can vary depending on the particular strain you’re growing.

Below, we’ll walk you through the process of growing weed outdoors in Spain, month by month. Remember, this is only a general guide; the specifics will vary depending on where you live and what strain you’re growing. That said, we’ve included some average figures from Madrid and Málaga to give you an idea of what different growers might encounter.

APRIL

(Madrid) Day length April 1st: 12h 42m
(Madrid) AVG temperature: 5–17°C

(Málaga) Day length April 1st: 12h 37m
(Málaga) AVG temperature: 11–21°C

This is the time to prepare your outdoor grow space and germinate your seeds.

If you’re growing in northern Spain, we recommend germinating your seeds indoors in late April to avoid the last of the harsh winter. If you’re growing in southern Spain, you can start germinating in early April to take advantage of the longer growing season.

While you wait for your seeds to sprout, go out and source your pots, soil, nutrients, pH meter, scissors, and any other equipment you’re missing for your grow. Also, use this time to prepare your grow space, making sure it's clean, receives as much sunlight as possible, and isn’t visible from any public place.

Cannabis seedlings are super fragile, and you should keep them indoors for the first two weeks following germination. To grow strong, resilient seedlings, we recommend using our Starter Kit (which includes feminized or autoflowering seeds). Complete with a propagator, Easy Start starter pods, LED lighting, and perlite, this kit contains everything you need to start propagating your seeds.

How To Grow Cannabis Outdoors In France, March, April, May

MAY

(Madrid) Day length May 1st: 13h 57m
(Madrid) AVG temperature: 8–22°C

(Málaga) Day length May 1st: 13h 43m
(Málaga) AVG temperature: 14–24°C

If you time things right, your seedlings should be ready to move outdoors by mid-May, just in time for the start of summer. As soon as they’ve developed leaves with at least five fingers, we recommend feeding your plants with a 4:2:3 N:P:K fertiliser to start encouraging more vigorous vegetative growth.

How To Grow Cannabis Outdoors In France, March, April, May

JUNE

(Madrid) Day length June 1st: 14h 52m
(Madrid) AVG temperature: 13–29°C

(Málaga) Day length June 1st: 14h 31m
(Málaga) AVG temperature: 18–28°C

June marks the beginning of summer across Spain. However, the temperatures in north/northwestern cities like Bilbao, Oviedo, and A Coruña are still relatively cool at this time of the year, peaking in the low 20s. These areas also receive considerable rainfall throughout June.

Overwatering cannabis is even more harmful than underwatering, since it can drown the roots and attract fungi and other pests. Oidium, for example, is a common fungus affecting cannabis. Pay attention to the weather forecasts, and move your plants indoors if there’s a risk of prolonged heavy rainfall. Also, remember to keep your young plants out of heavy winds.

In Barcelona, temperatures are higher in June, peaking at about 27°C. Rainfall is lower, averaging at about three days per month. This climate is ideal for young cannabis plants; you don’t have to worry about your plants drowning in heavy rain, and the temperatures also aren’t high enough to cause heat stress.

In Cordoba, Madrid, and other inland cities like Seville, June is usually already very hot, with temperatures peaking at around 32°C with very little rainfall (1–3 days per month). These conditions are also very good, though you’ll want to be careful with young plants during the first 2–3 weeks of the month to ensure they don’t get damaged by the high temperatures and long, sunny days. While cannabis loves sun and heat, too much of either can be damaging to young plants.

In southern Spain, temperatures are a little milder in June. Peak temperatures in Málaga, for example, are between 27–28°C, with rainfall limited to about one day per month. These conditions are ideal for growing a wide variety of cannabis strains—both large sativas and bushier indicas.

By June, your weed plants will be well into their vegetative phase. At this stage, it’s a good idea to ramp up your nutrients with a 10:5:7 fertiliser. Watering will depend on the weather in your area, but as a general rule of thumb, only water once the top 2.5–5cm of soil is completely dry.

How To Grow Cannabis Outdoors In France, March, April, May

JULY

(Madrid) Day length July 1st: 15h 0m
(Madrid) AVG temperature: 16–33°C

(Málaga) Day length July 1st: 14h 38m
(Málaga) AVG temperature: 21–31°C

July is mid-summer in Spain and marks the beginning of the hottest part of the year across the country. By this stage, your weed plants will be about 6–8 weeks into their vegetative phase, depending on when you germinated your seeds. Remember to feed your flowering plants a phosphorus-rich fertiliser to encourage budding. Most growers start their flowering plants off on 5:10:7, before moving to 6:15:10.

If you’re growing autoflowering strains, they’ll likely start flowering at the end of June/beginning of July. If you’re growing feminized strains, they’ll probably still be vegging in July or just starting to develop their first pistils. If you’re using regular seeds, July is also the time to separate your males and females unless you're breeding.

If you’re growing in central Spain, July and August can be extremely hot. Temperatures in Seville, for example, can top 35°C during these months. Make sure to keep a close eye on your plants to ensure they’re capable of dealing with the heat, and consider giving them some shade if they’re showing signs of heat stress. You’ll also want to water your plants regularly to help them deal with the high temperatures in these areas.

How To Grow Cannabis Outdoors In France, March, April, May

AUGUST

(Madrid) Day length August 1st: 14h 17m
(Madrid) AVG temperature: 16–33°C

(Málaga) Day length August 1st: 14h 0m
(Málaga) AVG temperature: 21–31°C

August in Spain is harvest time for most autoflower growers. Depending on when exactly you germinated your seeds, you should be doing your two-week flush somewhere between late July and mid-August.

For the best results when harvesting, we recommend trimming your buds while wet and hanging them upside down in a dark place. If possible, keep the temperature and relative humidity in your drying room at 20°C and 50%, respectively, for the first three days. Then, change your temperature and humidity to 17–18°C and 60% to slow the drying process and produce a better smoke.

Most photoperiod strains will still be flowering during August. If you’re growing in the Balearic Islands (Mallorca, Ibiza, Menorca, and Formentera), beware of the humidity (which can reach up to 70%).

To prepare yourself for harvest season, we recommend cleaning and preparing your drying room towards the end of August. Make sure your drying space is clean, equipped with drying racks and lines, and, if possible, invest in an air conditioner and dehumidifier to have extra control over the drying of your weed.

How To Grow Cannabis Outdoors In France, March, April, May

SEPTEMBER

(Madrid) Day length September 1st: 13h 04m
(Madrid) AVG temperature: 14–29°C

(Málaga) Day length September 1st: 12h 56m
(Málaga) AVG temperature: 19–28°C

September marks the beginning of the harvesting season in Spain (for photoperiod strains). If you’re growing indica strains with a short flowering time, your plants should be heavy with big, frosty buds by now. Use a jeweller’s loupe to keep a close eye on your flowers—your plants will be ready to harvest once most of the trichomes are cloudy, with some turning amber.

In northern Spain, the rain tends to pick up towards late August and September. Make sure to pay close attention to this, as excess humidity and rainfall can cause bud rot. If your area is expecting heavy rainfall, you may want to move your plants indoors or consider harvesting them a little early to prevent fungus from ruining your entire harvest.

How To Grow Cannabis Outdoors In France, March, April, May

OCTOBER

(Madrid) Day length October 1st: 11h 45m
(Madrid) AVG temperature: 9–21°C

(Málaga) Day length October 1st: 11h 47m
(Málaga) AVG temperature: 15–24°C

October is harvest time across most of Europe, and Spain is no different. By this time of year, most cannabis strains (including sativas) will be heavy with big, mature buds. If you’re growing a Haze, however, you may have to wait until early or mid-November to harvest.

Again, watch out for the increased rainfall and keep your budding plants as dry as possible throughout the final weeks of flowering.

How To Grow Cannabis Outdoors In France, March, April, May

PROS AND CONS OF GROWING CANNABIS OUTDOORS IN SPAIN

Pros:

• Private cultivation for personal use is decriminalized
• Summers are long, warm, and sunny
• Mediterranean and Southern regions have an ideal climate for growing cannabis
• Spain is home to some world-class cannabis genetics

Cons:

• Growers can be fined for plants visible from a public place
• North/northwestern Spain has a shorter, wetter growing season
• Fungus and pests can strike in areas with heavy rainfall

TOP 3 RQS STRAINS RECOMMENDED FOR OUTDOOR GROWING IN SPAIN

Due to Spain’s climatic diversity, finding the right strain to grow here can be tricky. Luckily, we’ve taken the guesswork out of the equation. Here are three of the best strains to grow outdoors in Spain.

• White Widow Automatic — Ideal for northern growers

White Widow Automatic is pretty unbeatable; it’s small, discreet, highly resilient to pests and plagues, and ridiculously easy to grow. Regular feeding and a solid watering schedule are all this lady needs to produce exceptional bud. Plus, with a total crop time of just 75–85 days, this strain is ideal for northern growers facing a short, wet grow season.

White Widow Auto

White Widow Automatic

White Widow Automatic Royal Queen Seeds

Genetic background White Widow x Ruderalis
Yield indoor 400 - 450 g/m2
Height indoor 40 - 80 cm
Flowering time 7 - 8 weeks
THC strength THC: 14% (aprox.) / CBD: Low
Blend 40% Sativa, 40% Indica, 20% Ruderalis
Yield outdoor 190 - 240 g/per plant (dried)
Height outdoor 50 - 110 cm
Harvest time 10 - 12 weeks after germination
Effect Physically stoned
 

Buy White Widow Automatic

 

• Critical — Perfect for inland growers

Critical is a profit-yielding strain capable of putting up with some pretty tough conditions. It is especially drought-resistant, which is what makes it our top recommendation for growers living in central Spain. Just remember to feed and trim it regularly, and use some LST to really bring out the best this strain has to offer.

Critical

Critical

Critical Royal Queen Seeds

Genetic background Afghani x Skunk
Yield indoor 500 - 550 g/m2
Height indoor 80 - 140 cm
Flowering time 7 - 8 weeks
THC strength THC: 18% (aprox.) / CBD: Low
Blend 40% Sativa, 60% Indica
Yield outdoor 500 - 550 g/per plant (dried)
Height outdoor 180 - 220 cm
Harvest time Late September
Effect Stoned, physically and mentally
 

Buy Critical

• Amnesia Haze — The choice plant for coastal growers

Amnesia Haze was bred using top-shelf Haze genetics. It produces big, airy buds that prevent fungus problems even in very humid conditions. Capable of producing up to 700g/plant, Amnesia Haze is also one of our best yielders. And while it can take up to 11 weeks of flowering to reach full maturity, trust us—the wait is well worth it!

Amnesia Haze

Amnesia Haze

Amnesia Haze

Genetic background Original Amnesia Haze
Yield indoor 600 - 650 gr/m2
Height indoor 80 - 140 cm
Flowering time 10 - 11 weeks
THC strength THC: 22% (aprox.) / CBD: Medium
Blend 70% Sativa, 30% Indica, 0% Ruderalis
Yield outdoor 650 - 700 g/per plant (dried)
Height outdoor 175 - 210 cm
Harvest time Late October
Effect Extremely high, long-lasting, body relaxing
 

Buy Amnesia Haze

 

SUMMARY — GROW YOUR STRAINS IN SPAIN!

Spain is one of Europe’s most weed-friendly nations. If you’re lucky enough to live here, make sure to take advantage of the country’s great climate and cultivation laws to grow your very own weed under the sun!

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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.

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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.

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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.

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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: