How Much Sun Does San Pedro Need? ( Don’t Kill Your Pedro)

The San Pedro cactus, native to the Andes of Peru and Bolivia, is a vigorous succulent with a columnar stem and numerous spines. It grows 12 inches (30 cm) per year, needing ample space in which to stretch out. In the wild, these cacti cover large stretches of land as they grow towards the sky.

It’s easy to imagine that in full sun this fast-growing plant would get too hot, so it’s nice that it also appreciates some shade during the hottest months.

San Pedro plants like to get some shade in the middle of the day when it gets too hot out—but basically all it needs is full sun all day long. And don’t worry about getting too much water; these plants are hardy and will thrive even if you’re more forgetful than most about watering.

Can San Pedro Cactus Grow in Shade?

San Pedro cacti are a species of Echinopsis native to the Andes Mountains between Bolivia, Ecuador and Peru. They grow fast and tall, with an average height of 4 meters. This cactus is also called Peruvian torch or golden torch because of its gold-colored spines. The cactus can thrive in full sunlight, but it can also grow under partial shade.

How Many Hours of Light Does a San Pedro Cactus Need?

In its natural habitat, San Pedro receives a lot more than just six hours of sunlight per day. It has been able to adapt to our climate and can live here quite comfortably with around 6-8 hours of bright sunlight every day. 

Sometimes it is not possible for gardeners living in colder regions to grow their plants outdoors all year round, especially if they want them indoors during the winter months when the weather outside is too cold.

 If you cannot place your plant near a southern-facing window without fear of it getting too cold, you can use grow lights and put your plant on an artificial “sun schedule.” This will mimic how much light the plant would get on a daily basis with

What Kind of Grow Light for Cactus?

The best artificial light for cacti are fluorescent bulbs/tubes or LED grow lights like this.

Grow San Pedro Indoors Under Artificial Light

The speed at which they develop depends on many variables. In short, you could “pull it hard” and become more resilient. Or, you can build rapid mast columns with fertilizer, water, light, and even temperature.

Personally, I’m not a  big fan who likes artificial light or rooms that stay. In the summer months, the sun is always more effective than lighting sources… Also, if you’re really keen to include small amounts of a pillar in your diet, the sun can also benefit the food items.

The Trichocereus pachanoi is typically found in mountainous regions ranging from up to 3,000 meters higher than sea level. What lamp is best suited to provide a comparison to UV radiation?

Environmental Factors

It is believed that the San Pedro prefers a temperature between 20 to 30 degrees Celsius during the germination phase. Set your container near an area of heat in order to ensure it stays warm. However, you must be on the lookout to ensure it doesn’t get completely dry.

Humidity is another aspect to be considered when the process of germination. The cactus is likely to become tolerant of a dry climate. In the beginning days, it is recommended to ensure that the area is kept humid. This can be achieved by spraying the interior of the box a regular time. Humidifiers are also a possibility.

The cactus that you have sprouted will require adequate light. It should be exposed in direct light during this time is not advised. The plant can utilize an artificial light source in the first few weeks, and for between 16 and 18 hours. After about a month the cactus may be put in direct sunlight. After one year it can be placed in full sunlight.

How to Care for Your Cactus

Like other plants Like all plants, San Pedro will need love attention, care and love to flourish. To ensure that your plants are healthy and happy it is essential to be aware of certain aspects.

The overwatering of plants can be an issue. Cacti prefer dry environments and don’t require frequent irrigation. In winter, watering could cause issues, particularly in colder temperatures. You must water your cacti however, keep it to an absolute minimal amount. Regular watering from spring to the fall season is recommended, especially during the summer heat.

Cactus plants also require periodic nutrients to maintain their health and expand. You can purchase specific nutrients specifically designed for Cactus. Cacti like small quantities of nitrogen, and larger quantities of potassium and mineral phosphorus. A good bet NPK to cacti would be 4–7-7, or 2–7-7.


If you are aiming to grow San Pedro in full sun, you should place it in a place where it can receive at least six hours of direct sunlight. If your plant is getting less than six hours of sun, move it. Remember that these cacti are sturdy, so they can be transplanted with ease. Or plan on repotting them in the spring or summer to ensure they get more exposure to intense heat, if necessary.

Anwar Hossain

My name is Anwar Hossain. I am a cactus lover, researcher, and cactus blogger.

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