Begonia Fire Fly is a vivid rex begonia with glowing foliage in shades of bright red, hot pink and deep burgundy. The large, slightly spiralled leaves have a fiery red centre that fades into darker burgundy or almost black edges, often with a fine metallic sheen across the surface. In bright indirect light, the foliage appears to glow, giving the plant its ‘Fire Fly’ name.

The leaves are broad and softly textured with lightly ruffled edges and deep veining. The undersides are usually rich burgundy-red, adding even more colour and contrast. Mature plants form a compact, bushy mound around 20–30cm tall and wide.

Although Begonia Fire Fly may occasionally produce small pale pink flowers, it is grown mainly for its dramatic foliage. Its intense red colouring makes it an ideal addition to your Pink Hues collection, pairing beautifully with Aglaonema ‘Pink Star’, Ficus ‘Belize’ and Syngonium ‘Pink Robusta’. It also works well within your Dark Collection thanks to the darker edges of the leaves.

Detailed Care Guide

Light

Begonia Fire Fly prefers bright, indirect light.

A position near an east or north-facing window is ideal. It can tolerate a little gentle morning sun, but avoid strong direct sunlight, particularly in the afternoon, as this can scorch the leaves and fade the fiery colours.

Too little light may cause the plant to lose some of its vibrant red tones.

Watering

Allow the top 2–3cm of compost to dry slightly between waterings.

• Keep the compost lightly moist but not wet
• Water thoroughly, then allow excess water to drain away
• Never let the plant sit in water
• Reduce watering during winter

Overwatering can quickly cause root rot and soft stems, so it is better to let the top of the compost dry slightly before watering again.

Always water at the base of the plant and avoid wetting the leaves.

Humidity

Begonia Fire Fly enjoys moderate to high humidity, ideally around 50–70%.

To increase humidity:

• Group it with other houseplants
• Use a pebble tray
• Place a humidifier nearby

Avoid misting directly onto the foliage, as rex begonias can develop marks or mildew if water remains on the leaves.

Temperature

Keep Begonia Fire Fly in temperatures between 18–24°C.

Protect it from:

• Temperatures below 15°C
• Cold draughts
• Sudden changes in temperature
• Radiators and heaters

Compost

Use a light, free-draining compost mix that still holds some moisture.

A good mix is:

• 2 parts houseplant compost
• 1 part perlite
• 1 part orchid bark or coco chips

This keeps the roots healthy whilst preventing soggy compost.

Feeding

Feed every 2–4 weeks during spring and summer with a balanced liquid houseplant fertiliser diluted to half strength.

Avoid feeding in autumn and winter when the plant is growing more slowly.

Repotting

Repot every 1–2 years in spring if needed.

Only move it into a pot one size larger if:

• Roots are growing from the drainage holes
• The compost dries out very quickly
• The plant has become overcrowded

Begonia Fire Fly usually prefers to stay slightly snug in its pot.

Common Problems

• Brown crispy edges: Low humidity or dry compost
• Yellow leaves: Usually caused by overwatering
• Brown patches: Too much direct sun or water left on the leaves
• Duller, greener foliage: Not enough light
• Soft stems or collapsing growth: Root rot caused by wet compost

Pet Safety

Begonia Fire Fly is toxic if eaten and should be kept away from pets and young children. The leaves and stems can cause irritation and stomach upset if consumed.