Watering Cacti: When Dry, Not on a Schedule

Erma's many cacti looked unhealthy; she'd been told they weren't wet enough.

Core Principle

Water when soil is dry from previous watering during spring/summer growth. Frequency depends on soil, sun, pot size, humidity—no fixed schedule works.

Key Factors

• Fast-draining soil (add pumice/perlite).
• Full sun = more water; shade = less.
• Winter: water lightly or not at all for most species.

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