Begonia rex-cultorum

Rex Begonia (Begonia rex-cultorum) is a houseplant in the Begoniaceae family. It is a medium to bright-light species that thrives between 1000 and 3500 lux. Optimal indoor care calls for watering roughly every 7 days, temperatures of 16–26°C, and about 60% humidity. According to ASPCA data, it is toxic to dogs and cats; reported symptoms include oral irritation, intense burning and swelling of mouth and tongue, excessive drooling, vomiting. It is also known as beefsteak-geranium.

ASPCA Pet Toxicity Determination

Toxic to Dogs? YES (Toxic)

Toxic to Cats? YES (Toxic)

Clinical Symptoms:

Oral irritation, intense burning and swelling of mouth and tongue, excessive drooling, vomiting.

Quantitative Care Thresholds

Light Level Profile Medium to Bright

Minimum Light Requirement 1000 Lux

Maximum Light Tolerance 3500 Lux

Watering Frequency Every 7 Days

Temperature Envelope 16°C – 26°C

Ideal Ambient Humidity 60% RH

Taxonomic & Field Verification

GBIF Usage Key 4930983

Native Biogeographical Range

🔬 Verify on GBIF Species Portal