Mimosa pigra, commonly known as the giant sensitive tree (pigra = lazy, slow), is a species of plant of the genus Mimosa, in the family Fabaceae. The genus Mimosa (Mimosaceae) contains 400–450 species, most of which are native to South America. M. pigra is a woody shrub native to tropical America but which has now become widespread throughout the tropics. It has been listed as one of the world's 100 worst invasive species and forms dense, thorny, impenetrable thickets, particularly in wet areas.
Bashful plant has strong disease resistance and is generally not prone to disease. Regarding care, this plant is relatively low maintenance. When grown outdoors it needs minimal watering, and larger plants typically do not need pruning. Smaller plants should be pruned after they have finished blooming. Bashful plant is suitable for anyone with an outdoor space, such as a garden or deck, and does not require extensive care experience.
How to keep Mimosa Pigra.
Light
The Bashful plant grows best in areas where the sun’s rays are unobstructed for most of the day, though it can also tolerate places with dappled light. Its health may decline if it receives too little sun or prolonged constant exposure, reflecting the light conditions of its native habitat.
Water
The bashful plant is moderately drought-tolerant and thrives when watered every 2-3 weeks, mimicking the fluctuating moisture levels of its natural habitat. It prefers outdoor conditions for optimal light and climate. During cooler months, when evaporation is reduced, the plant requires less frequent watering.
Humidity
This plant will thrive in moderate humidity, which is probably the level in your home. However, misting it a few times a week can be very beneficial. Make sure the room has good ventilation.
Temperature
Bashful plant originates from habitats with temperatures ranging from 68 to 100 °F (20 to 38 °C). For optimal growth, maintain comparable temperature conditions.
Fertilizer
The best time to fertilize a Bashful plant is in early spring, as it breaks dormancy. This encourages overall growth and flower development. Fertilizing improves the foliage, stems, and branches, and helps produce large, vibrant, long-lasting flowers. It also assists in moving nutrients from the roots to the blooms and enhances the plant's health and resistance to disease.
Pruning
The bashful plant needs careful pruning to control its aggressive growth. Trim the stems in early spring to encourage a bushier form and remove any dead branches. Regular pruning helps shape the plant and control its spread, promoting a healthier structure. Always use sterilized tools to prevent the spread of disease.
Botanical profile.
- Plant Type
- Shrub
- Life Cycle
- Perennial
- Hardiness Zone
- 9-11
- Mature Height
- 4.88 m
- Mature Spread
- 3.96 m
- Leaf Color
- Green, Dark Green
- Leaf Type
- Deciduous
- Flower Color
- Pink
- Flower Size
- 2.54 cm
- Bloom Time
- Summer, Early fall, Mid fall
- Planting Time
- Spring, Autumn
- Harvest Time
- Late summer, Fall, Early winter
- Native Area
- Chile, Belize, Honduras, Mexico, Guatemala, Peru, Trinidad and Tobago, Panama, Uruguay, Colombia, Paraguay, Argentina, Bolivia, Venezuela, Brazil, Guyana, El Salvador, Suriname, Costa Rica
Other names.
Reader questions.
What's the best way to water my shy plant?
To ensure excellent root development, place a garden hose at the base of the plant. Avoid spraying the leaves directly and be aware that outdoor plants in direct sunlight may need more water. You can use bubblers or soaker hoses to moisten the roots. When adding or removing plants, use soaker hoses that cover the entire garden or bed to deeply penetrate the roots. After watering, drain any excess water and wait for the soil to dry before watering again. To prevent diseases, water at ground level. On sunny days, it is also beneficial to spray the entire bush with water. Whether potted or in-ground, remember that the Bashful plant prefers deep watering over light sprinkling.
What are the sunlight requirements for the Bashful plant?
The Bashful plant, known botanically as Mimosa pigra, thrives under full sunlight, requiring more than 6 hours of unobstructed sunlight daily. It can also adapt to partial sun conditions, needing about 3-6 hours of sunlight. However, for optimal growth and health, it's crucial to position your plants in locations that offer a balance of light and shade, as advised by observing how sunlight moves through your garden.
What is the ideal temperature range for growing a Bashful plant?
The Bashful plant, scientifically known as Mimosa pigra, thrives in environments with temperatures ranging from 68 to 100°F (20 to 38°C). To ensure optimal growth, it's crucial to maintain similar temperature conditions. The plant is extremely heat-loving, and exposure to cold temperatures can be harmful. During the colder months, it's advisable to bring outdoor-grown Bashful plants indoors, placing them near a bright window while keeping a safe distance from heaters. Maintaining temperatures above 20°C during winter is beneficial for the plant's growth, while temperatures approaching 0°C can be detrimental.
What do I do if I give Bashful plant too much or too little water?
If a Bashful plant is overwatered, its leaves may turn yellow, drop off, and wilt. The plant may also appear dull and unhealthy, with mushy stems. When these signs begin to show, it's best to adjust your watering schedule as needed. Wilting can also be a sign of under watering. Under these circumstances, you may notice that the leaves become crispy and dry, whereas overwatered leaves will be soft and wilted. If the soil is dry and simply watering is not enough, give the plant a thorough watering in due time. Sufficient water will help the Bashful plant recover, but it may still exhibit dryness and yellowing leaves within a few days due to damage to the root system. Once it returns to normal, the yellowing of the leaves will cease. When you have a Bashful plant indoors, always check the moisture levels in the pot and avoid overwatering. Look for signs of black spots, and if present, allow the soil in the pot to dry out by refraining from watering for a few days. Overwatering can lead to root rot, so if you see discolored and slimy roots, consider transferring the plant to a different pot. It's important to prevent root rot by avoiding excessively soggy soil. When planting your Bashful plant outdoors, dig a bit deeper and if the soil feels too dry when checking with your fingers, it may indicate underwatering. Adequate watering is necessary to aid in the plant's recovery.
How does the Bashful plant respond to different light conditions?
The Bashful plant favors environments where sunlight is abundant for most of the day but can also survive in areas with dappled light conditions. Both inadequate and excessively constant sunlight can lead to health deterioration, reflecting its need for a native habitat-like light balance. For indoor plants, artificial lighting becomes essential in spaces with limited natural light or during less sunny seasons. LED lights are recommended for their ability to provide specific light wavelengths. The intensity of artificial lighting should cater to the plant's sunlight needs; full sun plants require 30-50W/sq ft, partial sun plants 20-30W/sq ft, and full shade plants 10-20W/sq ft. The light source should be placed 12-36 inches above the plant for 8-12 hours a day to simulate natural daylight conditions.
How should I care for my Bashful plant during low temperatures?
Bashful plants prefer warm temperatures and do not tolerate low temperatures well. They thrive best when the temperature remains above 20°C, particularly during winter when it's crucial to keep them above 0°C. If the temperature falls below -5°C, the leaves may begin to lighten in color, and frost damage can cause the leaves to turn brown or black, leading to wilting and drooping. To mitigate frost damage, trim off the damaged parts and immediately move the plant indoors to a warmer environment. Place the plant near a south-facing window to ensure it receives ample sunlight, but avoid placing it directly near heaters or air conditioning vents to prevent the air from becoming excessively dry.
How often should I pour water on my Bashful plant?
The Bashful plant prefers to be watered deeply and infrequently. If they are planted in pots, make sure to soak them in a gallon of water each time because the soil in pots dries out faster. In cold regions, watering is needed every 3 to 5 days. Water the plant early in the morning when the soil is dry, whether it's indoors or outdoors. You can also check the soil to see if watering is necessary. When the top 2-3 inches of soil are dry, it's time to water the plant thoroughly. On hot days, check the moisture daily as the soil in the pot can dry out quickly. If you have a garden, make sure to irrigate the soil as well. In hot climates, watering once a week is usually sufficient. Only water when the top 2 to 3 inches of soil are dry. If there is a lot of rainfall, additional watering may not be necessary to prevent root rot. During the spring and fall, when the Bashful plant generally grows, add mulch about 3 to 4 inches deep to conserve water if they are planted outdoors. The frequency of watering depends on the type of soil. Sandy soil tends to drain faster, so watering should be done more frequently. However, clay soil retains moisture better, so watering can be less frequent, typically every 2-3 days. To keep track of watering, mark the date on the calendar and pay attention to the plant's leaves. If the leaves start to droop, you might be a day late in watering.
What are the symptoms of light deficiency or excessive sunlight in the Bashful plant?
Symptoms indicating light deficiency include smaller new leaves, leggy or sparse growth, faster leaf drop, slower or halted new growth, and paler new leaves indicating a lack of chlorophyll. Excessive sunlight can cause chlorosis, where leaves turn yellow, sunscald showing as pale or damaged areas on the plant, leaf curling as a defense against too much sunlight, wilting from excessive water loss, and leaf scorching, evident by brown crispy leaf edges. These symptoms highlight the plant's struggle with either too little or too much sunlight.
What should I do if my Bashful plant experiences high temperatures?
During the summer, it's important to ensure that the temperature around your Bashful plant remains below 38°C. Exposure to temperatures exceeding 43°C can cause the leaves to lighten in color and increase the plant's susceptibility to sunburn. If your plant does suffer from sunburn, trim away the sunburned and dried-up parts to help it recover. To protect your plant from excessive heat, move it to a location that provides shade during the midday and afternoon sun. It's also beneficial to water the plant in the morning and evening to keep the soil moist and help cool the plant.
How much water should I give my Bashful plant?
The Bashful plant typically requires about a gallon of water on a regular basis. If you have potted plants, it's best to water them until you see water dripping out of the bottom of the pot. Then, wait for the soil to dry before watering again. To determine how much water you've given your plant in a week, you can use a water calculator or moisture meter. During the flowering period, provide plenty of water but allow the moisture to evaporate afterwards to avoid root rot. If the Bashful plant is planted outdoors and experiences adequate rainfall, it may not need additional watering. When the plant is young or newly planted, make sure it receives 1-2 inches of rain per week. As the plant grows, it can rely solely on rainfall. However, during very hot weather or a period of no rainfall for 2-3 weeks, it's a good idea to water the plant fully during cooler parts of the day to prevent damage from excessive heat. Additional watering will be necessary during prolonged dry spells.
How can I address the Bashful plant's light exposure needs?
Optimizing light for the Bashful plant involves several strategies. Indoors, gradually move the plant to a location with at least 6 hours of direct sunlight, using a south-facing window for natural light or artificial grow lights if the plant is not easily moved. Outdoors, acclimate your plants to increased sunlight by shifting them gradually each week. Reduce obstructions like overhanging branches, or consider transplanting smaller plants to sunnier spots during their dormant period for better light access. Note, while adjusting light conditions can promote healthy new growth, parts of the plant already damaged by improper light exposure may not recover.
Should I change how often I water my Bashful plant based on the time of year or the weather?
The Bashful plant thrives being outside in the rain, but only needs watering during extended dry spells. In the spring and fall, keep the soil consistently moist but not overly wet, and alternating dry and moist conditions promote healthy growth. In the summer, hot weather and lack of rain can cause the soil to dry out quickly, so more frequent watering is needed to keep the plant moist. During winter, the Bashful plant requires less water as it goes dormant and drops its leaves. Use well-draining soil, like terracotta, to aid in water evaporation. Once the plant begins to sprout and go dormant, no watering is needed as it relies on fall and winter rains for survival during this period. In the spring, you can encourage growth and blooming by watering regularly as the temperatures rise. Ensure proper drainage at all times, especially during winter, and if the plant is potted, be mindful of limited root growth and provide adequate watering, especially in summer. Deep soak the entire root system once or twice a week, avoiding shallow sprinkles that promote fungal growth. Even in the dormancy of fall and winter, do not let the plants dry out completely. Avoid excessive water accumulation, as it can lead to plant death in winter. Applying mulch is beneficial in reducing stress, conserving water, and promoting healthy blooms.