Cactus

Cactaceae

AKA: Desert Cactus, Indoor Cactus

easy very_low water bright_indirect, direct Pet caution

Cacti are hardy desert plants adapted to intense sun and infrequent rainfall. Indoors, they thrive in bright light and dry conditions.

Small indoor cactus growing in a pot on a sunny windowsill

Care snapshot

☀️ Light
Bright Indirect, Direct
💧 Water
Very Low
💨 Humidity
Low
📈 Growth
Slow

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Cactus Care at a Glance

Cacti are some of the easiest houseplants to care for, thriving on bright light and minimal watering.

Best For

  • Bright windowsills
  • Busy people
  • Low-water homes
  • Beginner plant owners

Not Great For

  • Low light rooms
  • Overwatering habits
  • Homes with small children or pets

Light Requirements

Cacti need plenty of light to stay compact and healthy. Insufficient light causes stretching and weak growth.

How to Water a Cactus

Water only when soil is completely dry. In winter, watering may be reduced to once every 4–8 weeks.

Watering Tips

  • Always use pots with drainage holes.
  • Less water is better than too much.
  • Never mist cacti.

Soil and Pot

Excellent drainage is essential. Shallow terracotta pots help soil dry faster and prevent rot.

Growth & Dormancy

Most cacti grow slowly and enter a rest period in winter. Reduced watering during dormancy encourages future growth and flowering.

How to Propagate Cactus

  1. Remove an offset or cutting from the parent plant.
  2. Allow the cut surface to dry and callous for several days.
  3. Place in dry cactus soil.
  4. Water lightly after roots begin to form.

Cactus Problems (Fast Fix Guide)

Soft, mushy plant

Cause: Overwatering

Fix: Stop watering and repot in dry soil

Tall, thin growth

Cause: Low light

Fix: Move to brighter location

Wrinkled body

Cause: Underwatering

Fix: Water thoroughly once soil is dry

Safety Notes

  • Spines can injure skin and pets.
  • Handle with gloves or folded paper.

Pet warning

Most cacti are non-toxic, but spines can cause injury. Some species may cause mild stomach upset if ingested.

Video tips

Extra reading

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FAQ

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