Eryngium foetidum, commonly called culantro, is a tropical biennial herb indigenous to the American tropics and West Indies, now cultivated worldwide. Seeds are challenging to germinate due to photo-dormancy and slow sprouting times, requiring consistent warmth (24-29°C), high humidity, and bright light to break dormancy. Success depends on maintaining precise environmental conditions throughout the long germination period.
Before sowing
Seeds exhibit photo-dormancy and require light to germinate; gentle handling recommended due to seed coat characteristics
Sowing
What to expect
Tips
Seeds require light to germinate and must be sown directly on soil surface without soil covering (use only thin vermiculite dusting if needed). Scatter seeds thinly, press gently onto moist substrate, but do not bury. Germination is slow and irregular; expect sprouts in 2-4 weeks but some seeds may take 6-10 weeks - do not discard trays early. Use bottom heat mat to maintain soil temperature consistently at 80-85°F (27-29°C). Maintain high humidity with transparent dome and daily air circulation to prevent fungal damping-off. Mist daily (1-2 times) with spray bottle to keep surface consistently moist but not waterlogged. Once seedlings reach 2-3cm with first true leaves, gradually remove humidity dome over several days to acclimate. Keep substrate evenly moist and avoid direct afternoon sun. Do not transplant until seedlings are sturdy with several true leaves.
Sources: Underwood Gardens, West Coast Seeds, Terra Mater Gardens, University of Florida Gardening Solutions, Biology Insights, seed retailers, and peer-reviewed botanical sources
