Mimosa pudica, commonly known as the Sensitive Plant, Touch-Me-Not, or Shame Plant, is a fascinating member of the pea family (Fabaceae), native to South and Central America. It is widely grown as a novelty houseplant for its unusual ability to respond to touch.

The delicate, feathery foliage is arranged in pairs along slender stems. When touched, shaken, or exposed to sudden changes in light or temperature, the leaflets fold inward and the stems droop – a rapid movement known as seismonasty. After a short time, the leaves reopen, making this one of the most interactive plants you can grow.

In addition to its sensitive leaves, Mimosa pudica produces small, round, fluffy flowers in pink to lilac, resembling tiny pom-poms. These blooms typically appear in summer. Though often grown as a short-lived perennial in the tropics, in temperate climates it is usually treated as an annual, reaching 30–60 cm in height.

Mimosa pudica – Care Guide

Light

Thrives in bright, indirect light or gentle morning sun. Too little light leads to weak, leggy growth. Avoid harsh midday sun, which can scorch the fine foliage.

Watering

Keep the soil consistently moist but not soggy. Water when the top 2–3 cm of soil feels dry. Reduce watering in winter when growth slows. Sensitive to both drought and overwatering.

Temperature and Humidity

• Temperature: Prefers warmth, 18–26°C. Avoid draughts and exposure below 15°C.

• Humidity: Likes moderate to high humidity. Mist lightly in dry indoor environments.

Soil and Potting

Use a light, free-draining potting mix enriched with organic matter. A peat-free multipurpose compost with added perlite works well.

Feeding

Apply a balanced liquid fertiliser every 4 weeks during spring and summer. Avoid overfeeding, which may stress the plant.

Pruning and Maintenance

Prune leggy stems to encourage bushier growth. Mimosa pudica has a naturally sprawling habit, so it can also be supported with small stakes if desired.

Growth and Maturity

Fast-growing but short-lived, often completing its lifecycle within 1–2 years. Typically reaches 30–60 cm tall with a spread of 30 cm.

Common Issues

• Leaf yellowing/droop: Often caused by overwatering or insufficient light.

• Leaves not responding to touch: Natural if overstimulated or in dormancy.

• Pests: May be vulnerable to aphids, spider mites, and whiteflies.

Background and Benefits

Mimosa pudica’s sensitivity to touch makes it a favourite among children and plant collectors. Its rapid leaf movements evolved as a defence mechanism against grazing animals. In traditional medicine, it has been used for its soothing and healing properties, though it is primarily cultivated today as a botanical curiosity and ornamental houseplant.

✅ Quick Care Summary

• Light: Bright, indirect or gentle morning sun

• Water: Keep soil evenly moist; reduce in winter

• Temperature: 18–26°C; avoid below 15°C

• Humidity: Moderate to high

• Soil: Light, well-draining compost

• Feed: Monthly in spring and summer

• Growth: Short-lived perennial/annual, 30–60 cm; feathery leaves that fold when touched; pink pom-pom flowers