Mimosa pudica, commonly known as Sensitive Plant or Touch-Me-Not, is a tropical annual or short-lived perennial native to Central and South America, famous for its leaves that rapidly fold inward when touched or shaken. Seeds have a hard, impermeable seed coat requiring scarification and warm water soaking to germinate reliably within 7-28 days under proper conditions. This easy-to-grow ornamental thrives with warm temperatures, bright light, and consistent moisture, making it an excellent choice for interactive indoor gardening.
Before sowing
Scarification is critical as the hard seed coat is the primary mechanism restricting germination. Seeds should be scarified, then soaked to allow water penetration and trigger germination.
Sowing
What to expect
Tips
Scarification is essential: nick seeds with sandpaper or knife to expose the interior. After scarification, soak in hot water (80°C) for 10-15 seconds, then in room temperature water for 24 hours. Sow seeds barely covered in well-draining mix. Maintain soil moisture (not waterlogged) and provide bright light immediately after germination to prevent legginess. Bottom heat of 75°F (24°C) aids germination. Use clear plastic or humidity dome to retain moisture, but remove immediately upon sprouting to prevent fungal issues. Keep humidity low after germination to avoid rot and mold. Allow top 1 cm of soil to dry slightly between waterings. Transplant seedlings once they develop 2-4 true leaves (3-5 cm tall). Sensitive plants respond to touch and prefer humidity; avoid overwatering mature plants. Expect variable germination rates; plan to sow extra seeds.
Sources: Chauhan et al. 2009 (Weed Biology and Management); Seeds for Needs; Sow Right Seeds; PFAF Plant Database; Tropical Plants Database
