The Moon Cactus, specifically the red and yellow varieties, is a striking and colorful cactus known for its vibrant, spherical appearance. Scientifically referred to as Gymnocalycium mihanovichii 'Red' and 'Yellow,' these cacti are characterized by their bright, eye-catching colors and unique growth habit. The red and yellow varieties each have a distinctive hue—one featuring a vivid red cap and the other a bright yellow cap—making them popular choices for adding a splash of color to any plant collection. Typically, Moon Cacti are small, with the colorful top section growing to about 2 to 4 inches in diameter. They are usually grafted onto a green, columnar cactus rootstock, which supports the colorful top and allows it to thrive. The bright, colored section is covered in tiny spines that are relatively harmless, adding texture to its vivid appearance. Moon Cacti prefer bright, indirect light to maintain their vibrant colors and compact growth. They thrive in well-draining soil and require minimal watering, only when the soil is completely dry. Due to their low-maintenance needs and striking appearance, Moon Cacti are excellent for indoor environments, especially in containers or as part of a succulent arrangement. Their vivid colors and unique look make them a delightful and visually appealing addition to any plant display.