Thunbergia fragrans — an easy houseplant, prefers full sun light
SPECIMEN · FROM THE LIBRARY
Thunbergia fragrans

Thunbergia Fragrans

Updated · 185 observations
ON THIS PLANT

Thunbergia fragrans, the whitelady is a perennial climbing twiner in the genus Thunbergia, native to India and Southern Asia.

A note from PlantMom

Whitelady is resistant to disease and is typically not susceptible to illnesses. Regarding care, this plant is fairly low-maintenance. When grown outdoors it needs minimal watering, and larger specimens usually do not require pruning. Smaller plants, however, should be pruned after they finish blooming. Whiteladyt is suitable for anyone with an outdoor area, such as a garden or deck, and does not require extensive plant-care experience.

— PlantMom
CARE GUIDE

How to keep Thunbergia Fragrans.

Light

Whitelady does best in places with plentiful sunlight. Its native habitat has abundant sun. The plant does not need to be shaded. Too little light can impede its growth, while too much sun does not harm it.

Water

The Whitelady plant thrives in tropical environments and is tolerant of drought. It needs watering every 1-2 weeks to avoid waterlogging. It prefers warm climates and does best outdoors when the soil moisture mimics the natural pattern of intermittent rainfall.

Temperature

Whitelady is a plant that prefers warm environments and originates from areas where temperatures usually stay between 68 and 100 °F (20 to 38 ℃). Pay attention to seasonal variations and provide added protection or supplemental heat when temperatures drop in the colder months.

Fertilizer

Fertilize a Whitelady in early spring, as it breaks dormancy. This encourages overall growth and the development of flowers. Feeding improves the foliage, stems, and branches and encourages large, vibrant, long-lasting blooms. It also helps transfer nutrients from the roots to the flowers and enhances the plant’s health and resistance to disease.

Pruning

The Whitelady plant benefits greatly from being pruned in early spring. This process promotes healthy growth and more vibrant floral displays. To achieve the best results, start by removing any dead or weak stems and thinning out crowded areas to improve air circulation. Moderate pruning also helps control the size and shape of the plant, resulting in a lush appearance. By following these practices, you can ensure that your Whitelady plant stays healthy and looks its best.

Pot & Repot

Repot the White Lady every 2 to 3 years in the spring to encourage healthy growth. Use a medium-sized pot to allow it to develop properly. After repotting, make sure the soil stays moist and place the plant in partial shade. Regular pruning will help maintain the White Lady's shape and enhance its ornamental appeal.

CHARACTERISTICS

Botanical profile.

Plant Type
Vine
Life Cycle
Perennial
Genus
Thunbergia
Family
Acanthaceae
Hardiness Zone
10-11
Mature Height
3.05 m
Mature Spread
61 cm
Leaf Color
Green
Leaf Type
Evergreen
Flower Color
White
Flower Size
2.54 cm to 5.08 cm
Bloom Time
All year round
Planting Time
Spring, Autumn
Harvest Time
All year round
Native Area
Nepal, Sri Lanka, India, Indonesia, Cambodia, Vietnam, Myanmar, Philippines, Bhutan, Bangladesh, Laos, Thailand, China
ALSO KNOWN AS

Other names.

en White thunbergia en White-lady en White-nightshade en Chimine en Indrapushpam en Noorvan-valli en Susana blanca en Angel wings en Fragrant thunbergia en Sweet clockvine en White clockvine en Thunbergia White gem zh 碗花草
FREQUENTLY ASKED

Reader questions.

What's the best way to water my Whitelady plant?

To promote excellent root development, consider these watering tips for your plants. Place a garden hose at the base of the plant rather than spraying water directly on the leaves. If your plants are exposed to direct sunlight outdoors, the leaves will need more watering. You can use bubblers or soaker hoses to moisten the roots. When adding or removing plants, use soaker hoses that can cover the entire garden or bed to ensure deep watering for the roots. After watering, make sure to drain any excess water and allow the soil to dry before watering again. To prevent diseases, water at ground level rather than overhead. On sunny days, it can be beneficial to spray the entire bush with water. Whether your plants are in pots or in the ground, remember that Whitelady prefers deep watering rather than light sprinkling.

Why should I put fertilizer on my Whitelady plant?

Fertilization plays a crucial role in the overall health and well-being of a Whitelady. By providing the right combination of energy and nutrients, fertilization helps the plant to develop a healthy foliage, sturdy stems, and branches. Gardeners particularly value the flowers of a Whitelady, and fertilization plays a critical role in enhancing the quality of these flowers. The appropriate fertilization allows the plant to efficiently transfer energy from its roots to its stems and flowers, resulting in larger, more vibrant, and longer-lasting blooms. Moreover, proper fertilization ensures the overall health of the plant, increasing its ability to resist diseases.

What are the sunlight requirements for Whitelady (Thunbergia fragrans)?

Whitelady thrives best when it has access to full sun, meaning it should receive more than 6 hours of sunlight daily. It can also tolerate partial sun, approximately 3-6 hours of sunlight. Originating from a habitat abundant in sunlight, Whitelady does not need protection from the sun. However, inadequate sunlight hampers its growth, though excessive sunlight doesn't cause harm. To ensure your garden or indoor plants flourish, observe how sunlight moves throughout the area to provide an optimal balance of light and shade.

What is the ideal temperature range for growing Whitelady?

Whitelady thrives in warmer climates, ideally in regions where temperatures range from 68 to 100 °F (20 to 38 °C). It is crucial to protect the plant from colder temperatures, especially during seasonal changes. In colder months, it is beneficial to maintain temperatures above 20°C for the plant's growth, and exposure to temperatures near 5°C can be harmful. For outdoor-grown Whitelady plants, it's recommended to bring them indoors during autumn and place them near a bright window while keeping them away from direct heat sources to ensure they are kept in a suitable environment.

If I give Whitelady too much or too little water, what should I do?

A Whitelady that has been overwatered will exhibit several signs of distress. The leaves may turn yellow, drop off, and wilt, giving the plant a dull and unhealthy appearance. Additionally, the stems may become mushy. When these symptoms start to appear, it is advisable to adjust the watering schedule. On the other hand, wilting can also indicate under watering. In such cases, the leaves might become crispy and dry. To ensure proper hydration, check the soil moisture regularly. If the soil is dry and a small amount of water does not suffice, give the plant a thorough watering. However, even with adequate watering, the damaged root system may cause the Whitelady to display dryness and yellow leaves for a few days. Once the plant fully recovers, the yellowing of leaves will cease. When growing the Whitelady indoors, consistently monitor the moisture levels in the pot. Avoid overwatering, as it can lead to the development of black spots. If these spots appear, allow the soil to dry out by withholding water for a few days. Overwatering can result in root rot, which can be identified by discolored and slimy roots. If root rot is detected, consider transferring the plant to a different pot. It is crucial to prevent root rot by avoiding excessively soggy soil. When planting the Whitelady outdoors, make sure to check the moisture level by digging a little deeper. If the soil feels too dry, it may indicate underwatering, and providing sufficient watering will aid in the plant's recovery.

When should I fertilize my Whitelady plant?

To ensure optimum growth and flower development of your Whitelady plant, the best time to fertilize is during early spring as it emerges from dormancy and prepares to bloom. This initial feeding will provide the necessary energy for overall growth. However, it's important to note that fertilizing in spring is not the only beneficial time for feeding this plant. Giving it an additional feeding during the fall months can also be advantageous, although a smaller amount of fertilizer is sufficient. Some gardeners prefer to fertilize the Whitelady during planting, but this step is not essential in all cases.

How can artificial lighting be used for Whitelady if natural sunlight is insufficient?

When natural sunlight is lacking, especially during winter or in less sunny areas, artificial lighting becomes essential for the optimal growth of Whitelady. LED lights are favored for indoor plant lighting as they can be adjusted to emit specific wavelengths needed by the plants. For plants requiring full sun, 30-50W per square foot is necessary; for partial sun plants, 20-30W per square foot; and for full shade plants, 10-20W per square foot. The light source should be placed 12-36 inches above the plant, mimicking natural sunlight, and should be left on for 8-12 hours per day depending on the specific needs of the plant species.

How should I care for my Whitelady plant in cold weather?

Whitelady plants prefer warm conditions and do not tolerate low temperatures well. They thrive best when the temperature stays above 20°C and should be kept above 5°C during winter. If the temperature falls below 1°C, you might notice the leaves lightening in color, which can turn brown or black after frost damage, accompanied by wilting and drooping. To care for your plant in cold weather, trim off the frost-damaged parts and move the plant indoors to a warm setting. Placing the plant near a south-facing window ensures it receives ample sunlight, but avoid putting it too close to heaters or air conditioning vents as this could cause the air around the plant to become excessively dry.

How frequently do I need to water my Whitelady plant?

The Whitelady plant prefers deep and infrequent watering. When planted in pots, it is important to soak them in a gallon of water each time, as the soil dries out faster in pots. In cold regions, water every 3 to 5 days, preferably in the morning when the soil is dry. Check the soil inside the pot to determine if watering is needed - if the top 2-3 inches of soil are dry, it's time to water. During hot days, check the moisture daily as the soil can dry out quickly. If you have a garden, you'll need to irrigate the soil as well. In hot climates, water once a week when you notice about 2 to 3 inches of soil becoming too dry. Take rainwater into consideration and avoid overwatering to prevent root rot. Whitelady plants typically grow in spring and fall. Outdoors, apply a mulch of at least 3 to 4 inches deep to conserve water. Sandy soil requires more frequent watering, while clay soil requires less to avoid root rot. Keep track of watering dates on a calendar and watch for drooping leaves, as that may indicate a need for water.

When is it not a good idea to put fertilizer on my Whitelady plant?

During the winter, you don't have to worry about fertilizing your Whitelady plant because it goes into a dormant phase where it doesn't require much energy from the soil to grow. It's actually better to avoid fertilizing during this time because overfertilization can cause problems. The best times to feed your Whitelady are in early spring and fall. So for most of the spring and summer, you can hold off on fertilizing. Additionally, if your plant is experiencing extreme heat or dryness, it's wise to delay feedings.

What are the symptoms of insufficient light exposure in Whitelady?

Symptoms of insufficient light exposure in Whitelady include the development of smaller new leaves compared to older ones, leggy or sparse growth, premature dropping of older leaves, halting of new growth, lighter-colored new leaves indicating a lack of chlorophyll, and conditions such as chlorosis, sunscald, leaf curling, wilting, and leaf scorching. These symptoms indicate the plant is not receiving the appropriate amount of sunlight necessary for its health and development.

How do I protect my Whitelady plant from high temperatures?

During summer, it's important to ensure that Whitelady is kept below 38°C since temperatures above 43°C can lead to lighter leaf colors and increase susceptibility to sunburn. If you notice sunburned or dried-up parts on your plant, trim these areas off. To protect your Whitelady from high temperatures, move it to a location that shades it from the intense midday and afternoon sun. Watering the plant in the morning and evening helps keep the soil moist and supports the plant under high-temperature conditions.

PLATES
Thunbergia fragrans leaf
PLATE 01 · leaf
Thunbergia fragrans leaf
PLATE 02 · leaf
Thunbergia fragrans flower
PLATE 03 · flower
Thunbergia fragrans flower
PLATE 04 · flower
Thunbergia fragrans bark
PLATE 05 · bark
Thunbergia fragrans habit
PLATE 06 · habit
ALSO IN THE LIBRARY

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