Rex Begonia Care Guide
Begonia rex
Quick Answer
Rex Begonia needs watering every 1 week in summer and every 1–2 weeks in winter. It thrives in bright indirect and temperatures of 60–80°F. Difficulty: Moderate. ✅ Non-toxic to pets.
⭐Difficulty
Moderate
☀️Light
Bright indirect
💧Watering
Every 1 week
🌫️Humidity
Medium–High (50–60%)
🌡️Temperature
60–80°F
📈Growth Rate
Moderate
Toxicity
Source: ASPCA Animal Poison Control
Watering
Summer
Every 1 week
Winter
Every 1–2 weeks
Method: Allow top inch to dry; avoid waterlogged soil
Light Requirements
Bright indirect
Needs bright indirect light to maintain leaf color patterns.
Soil & Potting
Soil: Rich, well-draining mix (peat or coco coir + perlite)
Pot: Shallow pot with drainage
Temperature & Humidity
Temperature: 60–80°F (16–27°C)
Humidity: Medium–High (50–60%)
Fertilizing
Frequency: Monthly spring/summer
Type: Balanced fertilizer, quarter strength
Common Problems
Powdery white coating → Powdery mildew. Improve air circulation; treat with neem.
Fading leaf patterns → Insufficient light.
Mushy crown → Overwatering or crown rot. Reduce water.
Leaf drop → Low humidity or sudden temperature change.
Propagation
Leaf cuttings, division
Seasonal Care Calendar
🌸 Spring
Resume watering and fertilizing. Repot if root-bound.
☀️ Summer
Provide bright indirect light. Maintain good air circulation to prevent powdery mildew.
🍂 Fall
Reduce fertilizing. Watch for mildew as humidity rises with cooling weather.
❄️ Winter
Reduce watering. Plants may go semi-dormant with shorter days. No fertilizer.