The Best Cacti to Grow Indoors as a Beginner

Not all cacti are equally forgiving, and not all of them stay small enough for a windowsill. If you are new to growing cacti indoors, starting with a variety that is naturally compact, tolerant of imperfect conditions, and slow to cause problems gives you the best chance of success. Here are the varieties most likely to reward a beginner.

Golden Barrel Cactus (Echinocactus grusonii)

One of the most recognizable cacti, the golden barrel is a round, globe-shaped plant covered in bright yellow spines. It grows slowly, stays compact for years, and handles indoor conditions well as long as it gets a sunny window. It prefers south-facing light and will tolerate some drought. A classic choice for a bright windowsill.

Mammillaria

Mammillaria is one of the largest genera of cacti and includes hundreds of species, many of them perfectly sized for a windowsill. They are typically small, clustering freely over time, and many produce pretty pink or white flowers in a ring around the top of the plant with minimal encouragement. They are forgiving of occasional missed waterings and do well in a sunny east or south window.

Prickly Pear (Opuntia)

The flat, paddle-shaped prickly pear is one of the hardiest and easiest cacti to grow. Young plants stay manageable indoors and are very drought-tolerant. One note: the tiny hairlike spines called glochids can be surprisingly irritating to the skin. Handle with care or use gloves.

Chin Cactus (Gymnocalycium)

Gymnocalycium is a good choice for lower light conditions. Unlike most desert cacti, many species in this group come from partially shaded habitats in South America and do not need full direct sun to thrive. They stay small, flower relatively easily, and are one of the few cacti that can get by in a north-facing window.

Bishop's Cap (Astrophytum myriostigma)

A distinctive star-shaped cactus with no spines and a surface covered in white flecks. It grows slowly, stays small for a long time, and is genuinely one of the easier cacti to care for. Its lack of spines also makes it more pleasant to handle.

Moon Cactus (Gymnocalycium mihanovichii grafted)

The colorful top portion of a moon cactus is a mutant cactus that lacks chlorophyll, grafted onto a green rootstock to survive. They are widely sold in garden centers and make striking small plants. They are a bit more delicate than the others on this list and do not like direct hot sun, but they are interesting and compact.

General Tips for All Beginner Cacti

• Start with the soak-and-dry watering method and resist the urge to water frequently

• Use a pot with drainage holes and a fast-draining cactus mix

• Place the plant in the brightest window you have

• Do not fertilize in the first year. New plants need to settle, not push growth