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What Temperatures can Cacti Survive? - Varnish + Vine

What Temperatures can Cacti Survive?

Cacti are fascinating plants that have adapted to survive in some of the harshest environments on Earth. With their unique ability to store water and withstand extreme temperatures, cacti can thrive in climates that would be inhospitable to most other plants. But what exactly is the ideal climate for a cactus? Let's explore.

What temperature range do cacti prefer?

Cacti are native to desert regions, where temperatures can vary greatly between day and night. Generally, cacti prefer temperatures between 70°F (21°C) and 90°F (32°C) during the day. However, they can tolerate temperatures as low as 50°F (10°C) and as high as 100°F (38°C) for short periods of time and certain cacti species (such as The Peruvian Apple Cactus) are more tolerant of cold temperatures than others (The Peruvian Apple Cactus can survive brief periods of temperatures as low as 20°F or -7°C).

How much sunlight do cacti need?

Cacti are sun-loving plants and require plenty of sunlight to thrive. They typically need at least six hours of direct sunlight each day. If you're growing cacti indoors, place them near a south-facing window or provide them with artificial grow lights that mimic natural sunlight.

What about humidity?

Cacti are well-suited to low humidity environments. In fact, they prefer dry air with humidity levels below 50%. High humidity can increase the risk of fungal diseases and rot in cacti. If you live in a humid climate, it's important to ensure good air circulation around your cacti and avoid overwatering.

How much water do cacti need?

Contrary to popular belief, cacti do need water to survive, but they have adapted to survive in arid conditions with very little water. Overwatering is one of the most common causes of cactus death as it can cause root rot. As a general rule, water your cactus only when the soil is completely dry. During the growing season, which is typically spring and summer, you can water your cactus once every two to three weeks. In the dormant season, reduce watering to once a month or even less.

Can cacti tolerate frost?

Most cacti are not frost-tolerant and can be damaged or killed by freezing temperatures. If you live in an area with cold winters, it's important to protect your cacti from frost. Bring them indoors or provide them with a frost cover during the winter months.


Cacti are resilient plants that can adapt to a wide range of climates, but they thrive best in warm, dry environments with plenty of sunlight. By providing the right temperature, sunlight, and water conditions, you can create a safe and suitable climate for your cactus to flourish.

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