Skip to content
Cuando plantar marihuana exterior

When to plant marijuana outdoors

Growing marijuana outdoors is a practice that attracts both hobbyists and experienced growers alike. However, for successful cultivation, it is essential to understand and adapt to the unique characteristics that the outdoor environment presents. This understanding goes beyond simply selecting seeds or choosing a planting location; It involves a deep appreciation of how multiple environmental factors interact with the life cycle of the cannabis plant.

From soil texture and composition to variations in climate and sunlight, every element of the outdoor environment has a significant impact on the health and productivity of marijuana plants. For example, well-drained, nutrient-rich soil can be the foundation for robust growth, while a detailed understanding of local weather patterns can help prevent problems related to pests and diseases. Additionally, hours of direct sunlight, ambient humidity, and day and night temperatures are all factors that must be carefully considered to ensure optimal development.


growing cannabis outdoors and mountains in the background with blue sky

Optimal Climatic Conditions

Climatic conditions are a fundamental pillar when growing cannabis outdoors. Each marijuana strain has its climate preferences, and understanding these needs is crucial to ensuring healthy growth and a bountiful harvest. Two central aspects of these conditions are temperature and humidity, including precipitation, each significantly affecting plant development.

Ideal Temperature

Marijuana, when grown outdoors, thrives in a temperature range that generally lies between 20 and 30 degrees Celsius. This thermal strip is optimal for most varieties, promoting vigorous growth and adequate flowering. It is crucial to avoid extremely low temperatures and frost, which can damage or even kill plants. On the other hand, excessively high temperatures can cause stress in plants, leading to problems such as growth interruption or a decrease in the production of cannabinoids and terpenes, affecting the final quality of the product.

Precipitation and Humidity

Humidity and rainfall are two interrelated factors that significantly influence outdoor marijuana cultivation. A balanced level of humidity is essential, as both dryness and excessive humidity can be harmful. High humidity, especially during the flowering phase, increases the risk of fungal diseases such as downy mildew or mold. On the other hand, a lack of humidity can lead to water stress, affecting the development of the plant and reducing the quality of the buds.

Natural rainfall can be beneficial for watering plants, but too much rain can saturate the soil, leading to drainage problems and possibly root rot. It is vital to plan the crop at a time of year where rainfall is not excessive and ensure good drainage in the growing area to avoid the accumulation of water.


close-up of cannabis bud and more marijuana plants in the background

Importance of Daylight Hours

One of the most crucial factors when growing cannabis outdoors is understanding and taking advantage of the natural light cycle. The hours of sunlight have a direct impact on the growth and flowering phases of marijuana plants, and its variation throughout the seasons plays a determining role in the life cycle of the crop.

Natural Light Cycle

Marijuana plants respond to changes in photoperiod, that is, the duration of daylight. During the vegetative growth phase, cannabis plants require long hours of light (ideally between 13 and 18 hours of light per day). This prolonged exposure to sunlight promotes robust, healthy growth.

As the days get shorter and the nights get longer, plants enter the flowering phase. This transition is naturally induced by a photoperiod of around 12 hours of light and 12 hours of darkness. During this phase, it is crucial that the plants are not exposed to light sources during the dark period, as this can interrupt their flowering cycle and negatively affect the yield and quality of the buds.

Variations According to the Season

The change in daylight hours throughout the seasons is an essential aspect in determining when to plant marijuana outdoors. In spring, with the gradual increase in daylight hours, is the ideal time to start cultivation, allowing plants to take advantage of the vegetative growth period during the long summer days. As summer progresses and autumn approaches, the days get shorter, triggering the flowering phase.

Growers should be aware of these seasonal variations and adjust their growing practices accordingly. By planting at the right time and considering seasonal light variations, you can maximize the health, growth and productivity of your outdoor marijuana plants.


outdoor cannabis cultivation with wooden fences and spiked wires

Soil Selection and Preparation

The choice and preparation of the soil are fundamental aspects to ensure a successful outdoor marijuana cultivation. Adequate soil not only provides the necessary physical support for plants, but also supplies the nutrients and environment for optimal development.

Soil Type

The ideal soil for growing cannabis must have certain characteristics:

  • pH : Soil pH is crucial. For marijuana, a slightly acidic pH, in the range of 6.0 to 6.5, is ideal. This pH level allows for optimal nutrient absorption.
  • Texture : The texture of the soil should be such that it allows for good moisture retention, but also excellent drainage. Sandy soils may drain quickly but retain fewer nutrients, while clay soils retain too much water and can drown roots. The ideal is a loam soil, which offers a balance between water retention and drainage.
  • Fertilizers : A soil rich in organic matter is beneficial. The presence of compost, worm castings, or bat guano can enrich the soil, providing essential nutrients such as nitrogen, phosphorus and potassium, as well as micronutrients.

Soil Preparation

Before planting, it is important to prepare the soil properly:

  • Soil Analysis : Performing a soil analysis can be very useful to determine the pH and nutritional content, and thus make the necessary adjustments. Start by collecting samples from various areas of your garden to a depth of 15-20 cm and let them air dry. air. You can use a soil test kit to measure pH and nutrients. Once you have the results, interpret the pH and nutrient levels to determine necessary amendments, such as lime to increase pH or fertilizers to correct nutritional deficiencies.
  • pH Adjustment : If the pH is not in the ideal range, amendments can be added to adjust it. Agricultural lime can raise the pH, while aluminum sulfate or iron sulfate can lower it.
  • Nutrient Enrichment : Adding compost or organic matter will improve soil structure and provide essential nutrients.
  • Tillage : Plowing or turning the soil helps loosen it, improving aeration and drainage.
  • Weed Control : Eliminating weeds before planting ensures that they will not compete with cannabis plants for nutrients and water.
  • Checking Drainage : It is essential to ensure that the soil drains well to avoid water accumulation. To check soil drainage, you can perform a simple water absorption test. This involves digging a small hole and filling it with water, watching how long it takes to drain completely. Good drainage is indicated when water is absorbed within a couple of hours. If water stagnates for longer, it is a sign that the soil may be too compact or clayey, requiring modifications to improve its structure. Improving soil drainage can involve incorporating organic matter such as compost or perlite, which helps loosen the soil and facilitate water flow.


wet soil with planting utensils

Space and Location

Proper space planning and location selection are crucial to success when growing marijuana outdoors. These factors directly influence the health of the plants and the quality of the harvest.

Plant Spacing

The space between plants is a vital factor for their optimal development. Proper spacing allows:

  • Adequate Air Circulation : This helps reduce the risk of fungal diseases, as moisture does not accumulate on the foliage.
  • Access to Sunlight : Every plant needs enough sunlight. Correct spacing ensures that all plants receive the light necessary for growth and flowering.
  • Unrestricted Growth : Cannabis plants can grow quite large, both in height and width. Sufficient space allows for unrestricted growth, crucial for root development and foliage expansion.

Recommended spacing may vary depending on variety and growing method, but it is generally suggested to leave at least 1 meter between plants to allow for proper growth.

Location Selection

Choosing the correct location within your garden or land is another key aspect. When selecting the location, consider the following factors:

  • Sun Exposure : Find a location that receives plenty of direct sunlight, ideally 6 to 8 hours a day. Sunlight is essential for photosynthesis and overall plant development.
  • Protection from the Elements : Consider protection from strong winds and the possibility of providing some coverage during heavy rain.
  • Privacy and Security : Growing marijuana may require some discretion. Choose a location that is not easily visible to curious onlookers and that complies with local regulations.
  • Access to Water : Make sure you have easy access to water for regular watering of plants.
  • Soil Quality : Check the quality of the soil in your chosen location, ensuring it is suitable for growing cannabis, as described above.


soil with planting utensils and chemical formulas of necessary compounds

Additional Factors to Consider

In addition to weather conditions, sunlight, soil, and location, there are other crucial factors to consider when growing marijuana outdoors. Protection against pests and animals and irrigation needs are aspects that can significantly influence the health and productivity of plants.

Protection againstPests and Diseases in Marijuana

Outdoor cannabis plants are exposed to a variety of pests and animals that can damage them. Here are some strategies to protect them:

  • Using Nets and Fences : Installing physical barriers such as nets or fences can be effective in keeping out large animals and some insects.
  • Biological Control : Using natural predators, such as ladybugs, to control aphids can be an environmentally friendly way to manage pests.
  • Organic Pesticides : In case of infestations, the use of organic pesticides may be necessary. It is important to choose products that are safe for cannabis plants and for subsequent human consumption.
  • Regular Inspection : Checking plants regularly for signs of pests or diseases allows you to act quickly before the problem worsens.

Irrigation Needs

Proper irrigation is essential for growing cannabis, and should be adjusted based on weather conditions and plant growth stages:

  • Vegetative Growth Phase : During this phase, plants usually require more water due to their rapid growth. Constantly moist (but not saturated) soil is ideal.
  • Flowering Phase : At this stage, water needs may decrease. It is important to avoid overwatering to prevent problems such as root rot.
  • Climatic Conditions : Irrigation needs will vary depending on the climate. In hot, dry conditions, watering will be necessary more frequently, while in humid climates, watering may be less frequent.
  • Irrigation Methods : Systems such as drip irrigation can be efficient in ensuring a constant and controlled supply of water. Avoid watering directly on the leaves to reduce the risk of fungal diseases.
Previous article Pizzicato Pruning in Marijuana Cultivation