Cardiospermum halicacabum is a climbing tropical and subtropical perennial herb, commonly grown as an annual, known for its distinctive inflated seed capsules resembling small balloons with seeds marked with white heart-shaped patterns
Before sowing
Both scarification and warm water soaking recommended for optimal germination
Sowing
What to expect
Tips
Sow indoors 6-8 weeks before last frost or direct sow after last frost. Keep soil moist but not waterlogged during germination. Transplant seedlings when large enough to handle to individual pots. Requires support structure (trellis/fence) and full sun for optimal growth. Prefers well-drained soil and regular watering. Plant is considered invasive in southern US states and New Zealand.
Sources: PFAF Plant Database, Gardeners HQ, Useful Tropical Plants Database, Outside Pride Seeds, Chiltern Seeds, Select Seeds
