There are many varieties of cacti, and they all come in a variety of different greens. Some cacti are a blue-green shade. One type, in particular, the pilosocereus azureus is a popular cactus that has a more vivid blue shade in the center than green with orange spines.
The pilosocereus azureus isn’t the only variety of blue cacti. When it comes to cactus plants, blue may not be as common as green, but they are more common than most people realize. Keep reading for everything you need to know about blue cacti.
Why Is Your Cactus Blue?
Many people love to incorporate blue into their dish gardens or outdoor desert gardens, and cacti are the perfect low-maintenance plant to add. However, many people wonder why certain types of cacti are blue. Cacti aren’t a standard shade of green, they actually come in varieties of shades (as well as sizes and shapes).
Some cacti are blue because of the way they have developed and adapted to their habitats. What you may not have known is that cacti are some of the most adaptive plants, which is why they have adapted into various shades and sizes.
It is believed that a cactus plant’s shade is due to how they have evolved and the coping mechanisms they’ve developed in order to survive harsh environmental conditions. The reason some cacti species are blue is unknown.
Many researchers believe that the blue shade is to help protect the cactus from the sun and pests. There are a few types of cactus plants that can grow blue other than pilosocereus azureus, including:
- Pachycereus Elephant cactus
- Cholla cactus
- Cereus Column cactus
- Bishop’s Cap
Why Is Your Cactus Changing Colors?
Many people love to use blue cacti as landscape plants, especially when the cactus flowers begin to bloom. The pale flower color always compliments the beautiful blue-green shade of the cactus and makes their spines appear less threatening.
However, some people worry when they notice the cactus plants in their garden changing colors. Here are some reasons why your cactus is changing colors:
Roots Are Too Close
One of the most common reasons a cactus will change color is because its roots are too close. You may notice the plant turning a slight purple shade. This is either because the pot you are using for the plant is too small, or it has been planted too closely in the garden to other plants and the roots are now crowded.
Try to always plant cacti in a location or pot with enough room for their roots to grow over time. You may need to re-pot the plant after a few years to ensure the roots have enough space.
You may notice fading on your plants, and this is usually due to a water problem. Many people over-water their plants because they believe the flowers will last longer. In the long run, they just ended up causing root rot to the plant.
This can cause that beautiful blue shade to start to fade and is a big problem if you planted your cactuses around other plants that need frequent watering.
Cactuses don’t need to be watered very often because they are adapted to extreme desert conditions. You should always wait until the soil has fully dried before you give them more water. Most cactuses only need to be watered every 2 to 4 weeks.
You may notice your plant turning a yellow shade if they are not getting an adequate amount of light. Since cactuses are adapted to live in the hot desert sun, it’s important that they are placed in direct sunlight. If they are indoors, they should be placed near a window to keep them stay healthy and they will retain their vivid color.
Blue cactuses are real, and they aren’t just your mind playing games on you. There are many species of cactuses that can be found in deserts all across the world. Each type is a different shade and shape, with different types of spines. Their color is believed to be their way of coping with their environmental conditions.
While researchers still don’t know for sure what causes this beautiful blue shade, they are leaning towards protection from the sun and hazardous pests. These blue plants are normally found in tropical regions, and grow better in outdoor gardens in the South. This is because they are used to hot and humid environmental conditions.