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Nematanthus spp.
goldfish plant
Atlantic forest regions of southeastern Brazil; epiphytes and lithophytes on tree branches and rocky outcrops at low to moderate elevations
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Growing Zones
USDA Hardiness Zones
10 - 12These zones indicate the coldest temperatures this plant can typically survive.
What's my zone? →Frost Tolerancetender
Overview
Nematanthus spp. is goldfish plant (guppy plant), a trailing evergreen perennial growing 12-24 inches (30-60 cm) tall and 12-24 inches (30-60 cm) wide. Orange to orange-red pouch-shaped tubular flowers 0.75-1 inch (2-2.5 cm) resembling leaping goldfish, solitary or paired at leaf axils, from March through August (20 weeks). Dark glossy green thick fleshy leaves 1-2 inches (2.5-5 cm), often reddish-purple beneath. In Gesneriaceae. Nematanthus = thread-flower. About 30 species, all epiphytes from the Atlantic forests of southeastern Brazil. Primarily grown as a houseplant in temperate climates — tender (frost-sensitive). The same family as African violets. Requires a cool winter rest (55-60°F / 13-16°C, 6-8 weeks, reduced water) to trigger spring bloom — without this rest period, flowering is sparse. This cool-rest requirement and the need for consistent humidity are the primary care limitations. Bright indirect light (east or west window). Not drought-tolerant. Deer-resistant (indoor). Non-toxic. Zones 10-12 outdoors. Growth rate is moderate.
Native Range
Native to the Atlantic forest regions of southeastern Brazil. Found as epiphytes and lithophytes on tree branches and rocky outcrops at low to moderate elevations.Suggested Uses
Grown as a trailing houseplant in hanging baskets, on shelves, and in containers of at least 1 gallon (3.8 L). Goldfish-shaped flowers. Bright indirect light. Humidity. Non-toxic. Zones 10-12 outdoors.How to Identify
Appearance
Size & Dimensions
Height1' - 2'
Width/Spread1' - 2'
Reaches mature size in approximately 2 years
Bloom Information
Spring through summer (March-August; year-round indoors with sufficient light). Orange pouch-shaped tubular flowers 0.75-1 inch (2-2.5 cm) at leaf axils. 20 weeks. Requires cool winter rest for heavy bloom.Detailed Descriptions
Flower Description
Orange to orange-red, tubular, pouch-shaped (resembling a goldfish), 0.75-1 inch (2-2.5 cm), with a small opening at the tip; solitary or in pairs at leaf axils along the trailing stemsFoliage Description
Dark glossy green above, often reddish-purple beneath, thick and fleshy, ovate to elliptic, 1-2 inches (2.5-5 cm); opposite on trailing stems; the glossy succulent-like leaves store waterGrowing Conditions
Sun Requirements
Requires 2-5 hours of direct sunlight daily
• Full Sun: 6+ hours of direct sunlight
• Partial Shade: 3-6 hours of direct sunlight
• Full Shade: Less than 3 hours of direct sunlight
Care & Maintenance
Care Guide
Bright indirect light (2-5 hours — east or west window). Well-drained acidic soil pH 5.5-6.5 (peat-based mix). Consistent humidity. Cool winter rest (55-60°F / 13-16°C, 6-8 weeks) for spring bloom. Pinch stem tips for bushier growth. Not drought-tolerant. Non-toxic. Tender (houseplant in temperate climates). Zones 10-12 outdoors.Pruning
Pinch stem tips in early spring (March-April) for bushier growth. Remove leggy or bare stems. Remove spent flowers (they drop cleanly).Pruning Schedule
J
F
M
A
M
J
J
A
S
O
N
D
early spring
Maintenance Level
moderateContainer Growing
✓ Suitable for container growing
Minimum container size: 1 gallons