Description
Tango is a selection from a hybrid between two well known Passiflora edulis cultivars, ‘Pandora’ and ‘Panama Red’. It produces excellent, large, reddish fruits that are full of sweet pulp and juice. It is also quite tolerant of cool conditions and can take brief freezes.
Germination Guide
🌍 Southern Brazil, Paraguay, northern Argentina
Moderate
Passiflora edulis 'Tango' is a tropical evergreen vine native to South America prized for its aromatic, seedy purple fruit and striking ornamental flowers. Seed germination is moderately challenging due to a hard seed coat and dormancy-inducing compounds, but success rates improve significantly with proper pre-treatment and warm temperatures. Fresh seeds germinate most readily within 10-14 days, while older seeds may require 1-3 months or pre-treatment with gibberellic acid.
Germination
Germination time
Expect germination in
10 – 90 days
Temperature
Min 20°C
Ideal 25°C
Max 30°C
🌡️ Temperature alternation recommended
— Alternating temperature regime of 20-30°C (at 12-hour intervals) produces best results; constant 25°C also acceptable. Bottom heat of 70-85°F (21-29°C) strongly recommended for faster germination
Substrate moisture
💧 Medium
Sowing depth
Lightly covered
Seed Pre-treatment
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💧
Soaking — 24 hours
Soak seeds in warm water (22-28°C) for 24 hours before planting; gibberellic acid treatment (500 ppm for 24 hours) significantly improves germination rates from 50-100%
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🔨
Mechanical scarification
Light mechanical scarification with fine sandpaper can improve germination of aged seeds; optional for fresh seeds
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📋
Additional notes
Pre-treatment is essential due to hard seed coat and germination inhibitors; seed freshness is the most critical factor—fresh seeds germinate in 10-12 days, aged/stored seeds may take months or fail entirely
Substrate & Container
Recommended substrate
Peaty seed starting mix, vermiculite, or well-draining potting soil with high organic matter
Recommended container
Small containers or cell trays with drainage holes; plastic dome or propagator to maintain humidity
Growing Tips
Use only fresh seeds when possible—freshness is the most critical factor for success. Soak seeds for 24 hours in warm water before planting, and maintain consistent bottom heat (75-85°F) using a heat mat. Keep soil moist but not waterlogged, and maintain 70-80% humidity using a plastic dome or propagator. Once seedlings emerge (usually 2-4 weeks for fresh seeds), gradually acclimate them to lower humidity and brighter light. Do not let seeds dry out after soaking, as they may become unviable. For aged/stored seeds, consider gibberellic acid treatment (500 ppm, 24 hours) which can increase germination from 50% to 100%.
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