Caring for a globe cactus (often Echinocactus grusonii, commonly known as the golden barrel cactus) is relatively simple since these plants are well-adapted to dry conditions. Here’s a guide to help it thrive:

1. Light

• Full sun is best. Globe cacti love bright, direct sunlight. Aim for at least 6 hours of direct sunlight per day. A south- or west-facing window or patio is ideal.

2. Watering

• Water thoroughly but infrequently. Let the soil dry out completely between waterings, especially in the warmer months. During the growing season (spring and summer), water about once every 2-3 weeks. In fall and winter, reduce watering even more, as the cactus enters dormancy and requires less water.
• Always check the soil’s moisture level before watering to avoid overwatering, which can lead to root rot.

3. Soil

• Use a well-draining cactus or succulent soil mix. You can improve drainage by adding perlite or sand. This helps prevent water from sitting around the roots, which is crucial for the cactus's health.

4. Temperature

• Globe cacti thrive in warm temperatures ranging from 70°F to 100°F (21°C to 38°C) during the day. At night, it can drop to cooler temps, but avoid anything below 50°F (10°C). They are not frost-tolerant, so bring them inside during cold months if they’re outdoors.

5. Humidity

• These cacti prefer low humidity. They’re well-suited for dry indoor environments. Avoid placing them in overly humid areas.

6. Fertilizing

• Fertilize sparingly. Use a diluted, balanced fertilizer (like a cactus or succulent-specific fertilizer) once during the growing season (spring to early summer). Avoid fertilizing in the fall or winter, when the cactus is dormant.

7. Repotting

• Globe cacti don’t need frequent repotting. Repot them only when they’ve outgrown their pot or the soil has degraded. Choose a pot that’s just slightly larger than the current one, as too much space can lead to overwatering issues.

8. Protection

• Handle with care! The spines of a globe cactus can be quite sharp. Use gloves or tongs when moving or repotting to avoid injury.

9. Growth and Flowering

• Globe cacti are slow growers, and they can live for many years. Occasionally, they may produce yellow or orange flowers at the top of the cactus when they reach maturity (around 10-20 years).