How to Grow Rex Begonia
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Rex Begonia
Begonia rex-cultorum
flowerRex begonias are stunning foliage houseplants prized for their large, intricately patterned leaves in shades of silver, burgundy, pink, and green. Unlike many begonias, they are grown primarily for their dramatic leaf colorations rather than flowers, though they do produce small pink or white blooms. They are tropical plants best suited to indoor cultivation in most climates.
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Example Rex Begonia timeline · Pittsburgh, PA (Zone 6b)
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Plant Rex Begonia
Around Apr 17Near Pittsburgh's average last spring frost.
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Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
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First Rex Begonia blooms
Mid-to-late summerBefore the first fall frost (≈ Nov 8)
Sample dates for Pittsburgh, PA. Sign up to get exact Rex Begonia dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives outdoors in zones 10b-11; best grown indoors as houseplants in cooler climates
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Get my Rex Begonia timeline →Growth Stages
Propagation/Rooting
3-6 weeksLeaf or rhizome cuttings develop roots in moist propagation medium
Maintain high humidity (60-80%), warm temperatures (70-75°F), and indirect light; use rooting hormone on leaf cuttings; mist regularly without waterlogging
Establishment
4-8 weeksYoung plantlet develops first true leaves and establishes root system in potting medium
Transition gradually from high humidity; provide bright indirect light; maintain consistent moisture; begin light fertilizing at quarter strength
Vegetative/Foliage Development
2-6 monthsPlant produces increasingly large, colorful leaves with distinctive patterns; rhizome expands horizontally
Maintain humidity around 50-70% using pebble trays, grouping, or humidifier; provide consistent bright indirect light; fertilize every 2-3 weeks with balanced fertilizer; rotate pot regularly
Maturity
Ongoing; indefinite with proper carePlant reaches full size with maximum leaf color and pattern development; may produce small flowers
Maintain established care routine; remove dead or yellowing leaves; repot annually or as needed; divide rhizomes in spring if plant becomes too large
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Increase humidity; spray foliage with water; use neem oil or insecticidal soap every 7-10 days; isolate infested plant
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Remove with cotton swab dipped in 70% isopropyl alcohol; spray with neem oil or horticultural soap; repeat every 7 days
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Allow soil surface to dry between waterings; use yellow sticky traps; apply gnat control products or gnat nematodes; repot in fresh soil if severe
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Remove affected leaves; avoid wetting foliage; improve air circulation; apply fungicide if widespread; ensure soil drains well
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Increase air circulation; reduce humidity slightly; remove affected leaves; spray with sulfur fungicide or milk solution (1:9 ratio)
Uses
Ornamental Houseplant
HouseholdRex begonias are prized indoor decorative plants that add tropical elegance to homes and offices. Their spectacular foliage makes them conversation pieces in living rooms, bedrooms, and plant collections. [source]
Floral Design & Arrangements
CraftIndividual rex begonia leaves are used in floral designs, pressed plant art, and decorative arrangements. Their unique patterns and colors make them valuable for botanical crafting projects. [source]
Traditional Herbal Uses
MedicinalSome begonia species have been used in traditional medicine systems to treat inflammation and digestive issues, though rex begonias are primarily ornamental and should not be ingested without professional guidance. [source]
Hummingbird & Pollinator Support
WildlifeWhile rex begonias are grown for foliage, their small flowers can provide nectar for hummingbirds and small insects in indoor or tropical settings. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Rex begonias are not harvested for yield but rather maintained for foliage display. Remove dead, yellowing, or damaged leaves regularly to encourage new growth. Propagate by taking healthy leaf cuttings (with petiole attached) or dividing rhizomes in spring for new plants
Fun Facts
- 🌱 Rex begonias were first hybridized in the 1850s from a species discovered in Assam, India, and the 'rex' name reflects their 'royal' status among ornamental foliage plants.
- 🌱 The stunning leaf patterns are due to multiple pigments including anthocyanins and silver-colored air cells in the leaf epidermis that reflect light.
- 🌱 A single rex begonia leaf can generate an entire new plant through vegetative propagation, making them incredibly economical for propagation enthusiasts.
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