Senna alexandrina is a tropical medicinal shrub native to North Africa and the Arabian Peninsula, widely cultivated for its laxative properties. Seeds have hard coats requiring scarification.
Before sowing
Scarification
quimica Sulfuric acid scarification for 10-15 minutes or hot water soaking for 24 hours
Soak
24 h Pre-soaking in warm water for 12-24 hours helps germination
Hard seed coat requires scarification; no cold stratification needed
Sowing
Substrate
well-drained soil
Depth
1cm
Temperature
27°C
Moisture
media
Container
nursery beds or containers
What to expect
Step 1
Pre-treat the seed
Step 2
Sow at 1cm · 27°C
Day 7–10
Seedlings emerge
Tips
Germination is hampered by salinity; maintain warm temperatures (77°F minimum); avoid waterlogging; sow at 1/2 inch depth with soil firmly tamped
Sources: Sheffield's Seed, Grokipedia, tropical.theferns.info, Wikipedia
