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Tips for Growing Outdoor Cannabis in Hot Weather

Are you growing outdoor cannabis in hot weather? While weed is a resilient plant, heat can pose challenges. In this blog, we provide tips on how to guide your plants through a hot summer and achieve a good harvest.

The dangers of warm weather in cannabis cultivation

While sunlight is beneficial for cannabis plants, high temperatures can cause heat stress, leading to various implications for marijuana plants.

amsterdam genetics blog image cannabis plant


Decreased transpiration

As the temperature rises, your cannabis plants transpire to provide cooling. However, low air humidity and dry soil can prevent transpiration, leading to overheating.

Curling leaves

The heat and dry air can cause your plant’s leaves to curl and dry out, which can have disastrous consequences.

Light buds

Heat can lead to qualitatively poorer buds that are misshapen, have white pistils, and are fuller at the top than at the bottom. These are signs of overheating.

During warm weather, closely monitor your cannabis plants for signs of heat stress, such as curled leaves, strange-shaped buds, and stunted growth in seedlings.

Cannabis strains that can handle heat well

Consider choosing cannabis strains that can withstand scorching summers if you anticipate hot weather. Strains from the Haze family, which were developed in warm and dry climates, are suitable for high temperatures.

Super Silver Haze

Super Silver Haze is specifically suitable for warmer weather, with a flowering time of 9 to 11 weeks.

Amnesia Haze

Amnesia Haze can withstand high temperatures and yield delicious buds with an earthy, spicy scent and taste.

Tips for caring for cannabis in heat

Provide extra care for your cannabis plants during hot summer days to ensure growth and bloom in warm weather.

1. Watering: moisture and cooling

Water your plants regularly, giving them slightly more water in high temperatures to prevent drying out. Water in the early morning to cool roots and the environment. Spraying the leaves with a fine mist also aids in cooling.

amsterdam genetics blog growing with high temperatures 2


2. Protect the roots

If your plants are in pots, protect them from heat. Paint the pots white or place them in a second outer pot for insulation.

3. Provide shade

While sunlight is essential, create shade during bright sun and high temperatures by moving pots to a shady spot or using a banner or parasol for plants in the ground.

4. Extra nutrients and supplements

Support your plants by providing silicon to make them more resilient against heat and strengthen branches. Consider adding seaweed and kelp for additional nutrients.

With these tips, you can protect your cannabis plants and help them thrive in hot weather.

Check Our Nutrients


Q: Can cannabis plants survive in hot weather?

A: Cannabis plants are resilient and can withstand high temperatures, but excessive heat can cause heat stress and affect their growth and bud quality.

Q: How can I protect my cannabis plants from heat stress?

A: You can protect your plants by providing adequate watering, creating shade, and using supplemental nutrients like silicon, seaweed, and kelp.

Q: Which cannabis strains are best for hot weather?

A: Strains from the Haze family, such as Super Silver Haze and Amnesia Haze, are known for their ability to handle high temperatures.

Q: How often should I water my cannabis plants in hot weather?

A: In hot weather, cannabis plants may need more frequent watering to prevent drying out. Check the soil regularly and water early in the morning.

Q: Can I spray water on the leaves of my cannabis plants to cool them down?

A: Yes, spraying a fine mist of water on the leaves can help cool down the plants. Contrary to a common myth, the droplets will not burn the leaves.

Dr. Jen Chalmers
Dr. Jen Chalmers
Dr. Jen Chalmers is an accomplished writer and cannabis enthusiast. With a Ph.D. in Botany and years of experience as a researcher, she brings a scientific perspective to her captivating articles on cannabis news, recipes, and the fascinating world of psychedelics.

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