Senna auriculata is a tropical legume with hard seed coat requiring scarification for successful germination. Native to dry tropical regions of India and Sri Lanka.
Before sowing
Scarification
agua_quente Hot water treatment for 30 seconds or nearly boiling water followed by 12-24 hours soaking in warm water. Mechanical scarification also effective.
Soak
12 h 12-24 hours soaking in warm water after hot water scarification. Seeds should swell with moisture absorption.
Hard seed coat requires scarification. Physical dormancy (PY) is primary dormancy type. Scarification and hot water treatment significantly increase germination.
Sowing
Substrate
Well-draining loamy soil, light to medium fertile soil
Depth
levemente_coberta
Temperature
21°C
Moisture
media
Container
Individual cell pots recommended for seed germination
Day/night swing
Temperature alternation 15/60°C for 3 months enhances dormancy release. Seeds germinate across wide temperature range.
What to expect
Step 1
Pre-treat the seed
Step 2
Sow at levemente_coberta · 21°C
Then
Seedlings emerge (~72%)
Tips
Keep substrate moist but not waterlogged. Provide full sun exposure. Plant prefers warm conditions (16-27°C mean annual temperature). Once dormancy is broken through scarification, seeds germinate readily across wide temperature range.
Sources: Journal of Forestry Research (2019), Plants For A Future Database, Tropical Plants Database, Grokipedia, World Agroforestry Centre
