Bidens pilosa is an annual herbaceous plant in the Asteraceae family, native to tropical America. It produces dimorphic achenes (central and peripheral seeds) with different germination requirements. Light-dependent germination makes it unsuitable for deep sowing.
Before sowing
Cold stratification (4 weeks for central achenes, 12 weeks for peripheral achenes) and GA3 significantly increase germination. Seeds have non-deep physiological dormancy.
Sowing
What to expect
Tips
Germinação máxima ocorre na superfície do solo (71% emergence). Sementes não germinam em profundidades >8cm. Duas morfologias de sementes: sementes longas germinam mais facilmente que sementes curtas. Sem dormência aparente em sementes frescas sob condições ótimas. Planta produz 3000-6000 sementes por planta.
Sources: Scientific Reports 2019 (Chauhan et al.), PLoS ONE 2022, Nature PMC 2019, plantflowerseeds.com, EDIS UF/IFAS, IUCN Global Invasive Species Database
