Moderate Perennial Toxic to pets

Rieger Begonia

Begonia elatior

Rieger Begonias are popular houseplants, celebrated for their vibrant, long-lasting flowers and compact form.

The essentials at a glance

Watering

Every 7 days
Light

Bright indirect light
Humidity

60–80 %
Temperature

18–24 °C

How to care for your Rieger Begonia

Everything you need to keep your Rieger Begonia healthy: watering, light, humidity, feeding, repotting and pruning.

Begonia elatior, commonly known as Rieger Begonia, is a widely cultivated hybrid known for its profuse, colorful flowers that bloom for extended periods, often throughout the cooler months. These plants are primarily grown as indoor ornamentals, appreciating bright, indirect light and high humidity. They thrive with consistent moisture but are susceptible to root rot if overwatered, so excellent drainage is crucial. Their compact size and vibrant floral display make them a favorite for brightening interior spaces.

Watering your Rieger Begonia

Every 7 days

Water thoroughly when the top inch of soil is dry, allowing complete drainage.

How to know it needs water

Soil surface dry to touch
Pot feels lighter

How much light a Rieger Begonia needs

Bright indirect light

Bright, indirect light

Direct sun tolerated: 0 to 2 h a day
Orientations that suit it: North, North-east, East, South-east, North-west

Humidity and misting

60–80 %

High Mist regularly or use a pebble tray to increase ambient humidity.

Feeding and fertiliser

Every 14 days

Feed every two weeks during active growth and flowering; reduce in winter.

Recommended feed: Balanced liquid fertilizer · 10-30-20

Repotting your Rieger Begonia

Every 12 months

Repot into a pot one size larger using a well-draining, peat-based mix.

When: Spring
Potting mix: All-purpose potting mix
Mix in: perlite, coco fibre

The tell-tale signs

Roots emerging from drainage holes
Stunted growth

Pruning your Rieger Begonia

After flowering Trim spent flowers and leggy stems to maintain shape and encourage new growth.

Through the year

Watering is not set once and for all: it follows the light and the growth. Allow 9 days between waterings in the depth of winter, against 6 in the growing season.

Active growth · Days between waterings

Toxicity

Contains soluble calcium oxalates; ingestion can cause oral irritation, vomiting, and difficulty swallowing in pets. The roots are the most toxic.

Good to know

Hybridized for their abundant, colorful flowers and compact growth habit.
Often given as a gift plant, blooming profusely for months.

Frequently asked questions about the Rieger Begonia

How do you care for a Rieger Begonia?

Water it every 7 days. Give it bright indirect light. Ideal humidity: 60–80 %. Ideal temperature: 18–24 °C. Water thoroughly when the top inch of soil is dry, allowing complete drainage.

How often should you water a Rieger Begonia?

Every 7 days Water thoroughly when the top inch of soil is dry, allowing complete drainage. How to know it needs water : Soil surface dry to touch ; Pot feels lighter.

How much light does a Rieger Begonia need?

Bright indirect light Bright, indirect light 0 to 2 h a day

Is the Rieger Begonia toxic to cats and dogs?

Yes. Contains soluble calcium oxalates; ingestion can cause oral irritation, vomiting, and difficulty swallowing in pets. The roots are the most toxic. Keep it out of reach of your pets and call a vet if any is swallowed.

Why are my Rieger Begonia leaves turning yellow?

Yellowing most often comes from too much water: the mix stays wet and the roots suffocate. Check that the pot drains, empty the saucer, and let the mix dry before watering again. Too little light or a cold draught cause the same symptom.

When should you repot a Rieger Begonia?

Repot every 12 months, ideally in spring. Repot into a pot one size larger using a well-draining, peat-based mix.