Cleome hassleriana, often referred to as the spider flower, stands out with its striking spiky clusters of vibrant blooms, which can be white, pink, rose, or purple. Reaching heights of 3 to 6 feet, it thrives in full sun and requires well-drained, sandy or loamy soil. This resilient plant not only enhances garden aesthetics but also plays a significant role in local biodiversity by attracting a variety of pollinators, including bees and hummingbirds. With proper care, including adequate spacing and watering, spider flowers can flourish, providing continuous beauty and ecological value throughout their growing season, offering insights into their further benefits.
Main Points
- Cleome hassleriana, or spider flower, is a native South American plant known for its tall stature and vibrant four-petal flowers.
- It thrives in full sun, well-drained soil, and requires consistent moisture, ideally around 1 inch of water per week.
- The flowering period lasts from early summer to the first frost, attracting various pollinators like bees, butterflies, and hummingbirds.
- Regular maintenance includes proper spacing, watering, and monitoring for pests, as well as deadheading for prolonged blooms.
- This plant produces elongated seed pods and can self-seed, allowing for natural propagation in gardens without additional planting.
Introduction

Cleome hassleriana, widely recognized as the spider flower, stands out with its unique structure and vibrant colors.
This fast-growing annual, indigenous to South America—primarily found in Paraguay, Uruguay, Argentina, and southern Brazil—reaches impressive heights of 3 to 6 feet, showcasing striking flower clusters in shades of pink, purple, and white.
With its resilience against pests and diseases, this remarkable species thrives in a variety of conditions, making it a popular choice for gardens seeking both beauty and hardiness.
Common Name
The spider flower, with its distinctive blooms that resemble the delicate legs of a spider, captivates garden enthusiasts and pollinators alike. Known scientifically as Cleome hassleriana, this ornamental plant garners attention not only for its unique appearance but also for its significant ecological role.
The spiky clusters of flowers, which can tower between 3 to 6 feet, offer a striking visual appeal, boasting vibrant shades of white, pink, rose, and purple. These colors thrive in sunny conditions, further enhancing their garden presence and charm.
Often referred to as the bee plant, spider plant, or spider weed, the common name "spider flower" emphasizes its fascinating floral structure, characterized by long, thread-like stamens. This attractive feature draws various pollinators, including bees and hummingbirds, establishing the spider flower as a crucial contributor to local ecosystems.
Originating from the warm climates of southern South America—specifically Argentina, Paraguay, Uruguay, and parts of Brazil—Cleome hassleriana has adapted well and flourished in temperate regions worldwide, making it a favored choice for gardeners seeking both beauty and ecological impact.
Scientific Name
Known scientifically as Cleome hassleriana, this enchanting plant belongs to the Cleomaceae family and showcases a unique combination of beauty and ecological significance. Originating from southern South America, including Argentina, Paraguay, and Uruguay, Cleome hassleriana thrives in diverse environments, making it a versatile addition to gardens worldwide.
Often referred to by its synonyms, such as Cleome houtteana and Tarenaya hassleriana, this striking species captures attention with its distinctive flower clusters. These clusters, featuring four delicate petals and six long stamens, bloom in a mesmerizing array of colors, including purple, pink, and white. The visual impact of these flowers enchants both casual observers and dedicated botanists alike.
In temperate regions, Cleome hassleriana is commonly cultivated as an annual plant, celebrated for its vibrant blooms and resilience. Its adaptability allows it to flourish despite varying conditions, offering a lively accent to any garden space.
As gardeners and enthusiasts explore the charm of this species, they not only appreciate its aesthetic value but also contribute to biodiversity, underscoring the importance of preserving such remarkable flora.
Overview
Brimming with color and charm, Cleome hassleriana, commonly called the spider flower, captivates gardeners and nature lovers alike. This fast-growing annual native to southern South America stands tall, reaching heights of 3 to 6 feet. Its unique and spiky flower clusters bloom vibrantly from early summer until frost, displaying an array of colors such as white, pink, rose, and purple.
The foliage of Cleome consists of palmately compound leaves, characterized by 5 to 7 leaflets that can possess a sticky texture due to glandular hairs. This intriguing feature not only enhances its aesthetic appeal but also serves a purpose by attracting essential pollinators, including hummingbirds, bees, and butterflies. Such biodiversity is invaluable in cultivating a thriving garden.
To flourish, spider flowers require well-drained soils and the abundance of full sun, making them an excellent choice for a sunny garden setting. They thrive within hardiness zones 2-11 and heat zones 1-12, demonstrating their adaptability.
Key Features
Cleome hassleriana, or spider flower, exhibits a remarkable growth size, reaching heights of 3 to 6 feet, which allows it to make a striking presence in gardens.
Its distinctive blooms, characterized by long, thread-like stamens and vibrant colors ranging from white to purple, create an alluring spectacle from early summer until frost.
The palmately compound leaves, adorned with 5 to 7 leaflets and occasional spines, contribute to the plant's intriguing texture, engaging both the eye and touch.
Growth Size
When considering the growth size of Cleome hassleriana, gardeners will appreciate its impressive height, reaching between 3 to 6 feet (90 to 180 cm). This tall plant boasts a stout structure, featuring robust stems that branch out widely, offering stability in various garden settings.
It's particularly useful for creating a striking backdrop in borders or for mass plantings, ensuring a bold presence.
The foliage of Cleome hassleriana is distinctive, characterized by its palmately compound leaves, which consist of 5 to 7 leaflets reaching up to 5 inches (12 cm) in length. These leaves contribute to a lush appearance, ideal for attracting attention.
Additionally, the plant's flower clusters can achieve notable widths of 6 to 8 inches, with each individual flower measuring 1 to 1½ inches across.
With a maximum crown width ranging from 12 to 24 inches (30 to 60 cm), Cleome hassleriana requires considerate spacing in garden designs, allowing for air circulation and light penetration.
Appearance
Standing tall in any garden, Cleome hassleriana showcases its unique features with striking visual appeal. This remarkable plant can reach heights of up to 6 feet, presenting a spectacle of long, slender stamens that mimic the legs of a spider.
The flowers of Cleome hassleriana are particularly enchanting; they measure 1 to 1½ inches wide and display a delightful array of colors, including shades of white, pink, rose, and purple, each offering a varying fragrance that can be musky or sweet.
The inflorescences are dense and terminal, adorned with four light green sepals and four clawed petals, while six prominent stamens create a stunning focal point. Beneath the blooms, elongated seed pods develop, containing small brown seeds which, upon maturation, effortlessly release their treasures into the environment.
Equally striking are the leaves, which are palmately compound and typically consist of 5 to 7 leaflets. Some varieties even possess a thorny characteristic, adding an intriguing texture to the plant's overall appearance.
With its striking colors, fractal-like shape, and dynamic structure, Cleome hassleriana is a spectacular addition to any landscape.
Flowering Season
The flowering season of Cleome hassleriana, commonly known as spider flower, runs from early summer until the first frost, offering a vibrant display for garden enthusiasts. This plant produces dense terminal inflorescences called racemes, where individual blooms measure between 1 to 1½ inches wide. The stunning range of flower colors, which includes white, pink, rose, and purple, enhances its appeal, while the varied fragrances—from musky to sweet—engage the senses.
During the flowering season, these eye-catching blooms attract a diverse array of pollinators. Hummingbirds, bees, butterflies, and even bats flock to the rich nectar, contributing to local biodiversity and ecosystem health. This not only benefits the spider flower but also provides essential resources for these creatures.
As the flowers fade, they develop elongated seedpods beneath, which release small brown seeds when mature, allowing for potential self-seeding. Consequently, Cleome hassleriana's long flowering season not only captivates the observer's eye but also plays a critical role in sustaining local wildlife populations, creating a symbiotic relationship that benefits both the plants and their pollinator guests.
Growing Requirements

Cleome hassleriana, commonly known as spider flower, requires specific growing conditions to flourish.
This vibrant plant thrives in full sunlight, requiring at least six hours of exposure daily, while favoring well-drained soil with a pH level between 6.0 and 7.0, ideally sandy or loamy in texture.
To guarantee robust growth and abundant blooms, gardeners should also consider its watering needs and spacing requirements, promoting a healthy environment for these striking flowers.
Light
With plenty of sunlight, Cleome hassleriana flourishes, requiring at least 6 hours of direct sunlight each day for ideal growth and vibrant blooms. This plant thrives in full sun, meaning that the more exposure it receives, the more robust its development becomes. Insufficient light can lead to tall, spindly growth, resulting in fewer flowers and diminished aesthetic appeal.
While Cleome hassleriana can tolerate light shade, it considerably prefers sunny conditions for optimal growth and maximum flowering potential.
The ideal temperature range for this perennial lies between 75-80°F during the day and 60-65°F at night. It's essential to understand that frost can be detrimental to these plants, highlighting the importance of planting them in warm, sunlit areas.
Not only do adequate sunlight and temperature promote healthy growth, but they also attract beneficial pollinators, such as hummingbirds and bees. These important insects are drawn to the colorful blooms, which further enhances the garden's ecological balance.
Soil
A thriving garden requires the right soil, and Cleome hassleriana is no exception. This enchanting plant flourishes in average garden soil, ideally sandy or loamy, with a pH range of 6.0 to 7.0, promoting healthy root development and vibrant blooms.
Ensuring the soil is well-drained is essential; without it, overwatering can lead to leggy growth, characterized by elongated stems and sparse foliage.
While Cleome hassleriana exhibits drought tolerance once established, it benefits considerably from regular watering in well-drained soil, which boosts both plant health and flowering potential.
Gardeners should note that consistent moisture encourages robust growth, ultimately enhancing the plant's aesthetic appeal in any landscape.
In dry conditions, mulching around the base of the plant serves a dual purpose: it helps retain soil moisture and reduces the frequency of watering needed.
Additionally, for those starting from seeds, understanding that cold stratification is critical for germination can enhance success rates; under ideal soil conditions, seeds sprout in slightly over a week, ushering in a season filled with the spider flower's unique charm.
Water
Typically thriving in moist, well-drained soil, Cleome hassleriana requires careful attention to its watering needs. While this lovely plant is quite drought-tolerant once established, it flourishes best with consistent moisture, especially during dry spells. Ideally, gardeners should provide at least 1 inch of water per week to encourage healthy growth and vibrant blooms.
However, overwatering can create problems, leading to leggy growth or root rot, so it's essential to allow the soil to dry slightly between waterings. Environmental conditions play a significant role in determining a plant's water requirements. In areas where full sun exposure is prevalent, increased attention to soil moisture becomes necessary, ensuring the plants don't suffer from dehydration.
Additionally, applying mulch around the base of Cleome hassleriana can be a practical strategy; it retains soil moisture and minimizes the frequency of necessary watering.
Vigilant gardeners will adjust their watering practices according to varying climatic conditions, ensuring that Cleome hassleriana receives just the right amount of moisture to thrive, resulting in a stunning display of flowers that can brighten any landscape.
Temperature
For ideal growth, Cleome hassleriana thrives within a temperature range of 75-80°F (24-27°C) during the day and 60-65°F (15-18°C) at night. This temperature range is essential for optimal germination and overall development, as temperatures consistently above 60°F (15°C) encourage strong, healthy plants. Cleome hassleriana performs best in warm climates, making the warmer months its prime growing season.
However, it's important to monitor the conditions closely. While these spider flowers do enjoy warmth, they're sensitive to extreme heat; when temperatures exceed 90°F (32°C), the plants may experience stress and require extra watering to maintain vigor.
Fluctuating temperature extremes can adversely affect blooming, resulting in poor flower production, which can be disappointing for gardeners keen to showcase their beauty.
Thus, maintaining a consistent temperature is crucial for encouraging robust flowering and full, vibrant growth. Growers should aim to create an environment where these beloved plants can flourish, ensuring that they thrive under the warm sun without the threat of frost, as Cleome hassleriana simply can't tolerate those harsh conditions.
Pollinator Criteria
Cleome hassleriana, renowned for its enchanting blooms, attracts an array of pollinators, including bees, butterflies, hummingbirds, and even bats.
Its unique floral structure, featuring six elongated stamens, produces generous amounts of pollen that entice these creatures, creating a vibrant symphony of life in gardens.
Attracted Pollinators
With its vibrant blooms and sweet to musky fragrance, Cleome hassleriana attracts a diverse array of pollinators, making it a valuable addition to any garden.
The spider flower's six elongated stamens are rich in nectar, enticing various species, including hummingbirds, bees, butterflies, and even bats. This profusion of nectar enhances the plant's allure, serving as a critical food source for these essential organisms.
Blooming from early summer until the first frost, the spider flower's dense, colorful inflorescences act as a visual beacon, drawing pollinators throughout the growing season.
Its spectrum of flower colors—white, pink, rose, and purple—further amplifies its attractiveness, ensuring it appeals to an expansive variety of species.
Pollination Method
Pollination in Cleome hassleriana relies heavily on its attraction to key pollinators like hummingbirds, bees, butterflies, and bats. The spider flower's vibrant colors and sweet to musky fragrance beckon these creatures, creating a bustling ecosystem during its active flowering season from early summer until frost.
The intricate structure of the flowers—featuring four clawed petals and six elongated stamens—facilitates seamless access for pollinators seeking nectar. This ingenious design enhances the likelihood of successful fertilization, ensuring a productive reproductive cycle.
As pollinators interact with the flowers, they inadvertently transfer pollen, leading to the formation of elongated seedpods after fertilization. These seedpods, upon maturity, release small brown seeds, thereby continuing the plant's life cycle and contributing to local biodiversity. Additionally, the production of seeds is vital for promoting biodiversity in local ecosystems, highlighting the interconnectedness of plant and pollinator relationships.
Care & Maintenance

When tending to Cleome hassleriana, enthusiasts should focus on strategic planting tips, ongoing care, and selecting suitable companions for ideal growth.
This vibrant plant flourishes in full sun, showcasing its resilience through designated watering routines and thoughtful spacing.
Such attention not only enhances its aesthetic appeal but also cultivates a thriving environment, inviting other flora to coexist harmoniously.
Planting Tips
To guarantee successful growth and blooming, gardeners should plant Cleome hassleriana in a sunny spot with well-drained soil, ideally sandy or loamy and with a pH of 6.0 to 7.0. This plant thrives in full sun and prefers ample light to produce its striking flowers.
When sowing seeds, it's vital to thin seedlings to about 18 inches apart; this spacing promotes healthy growth and minimizes overcrowding that can lead to disease issues like powdery mildew.
Regular watering is important, particularly during dry spells, to help the young plants establish a strong root system. However, Cleome hassleriana is drought-tolerant once settled, showcasing its resilience against limited moisture conditions.
To enhance bushiness and prevent spindly growth, gardeners can pinch back young plants, fostering a fuller garden display.
Additionally, deadheading spent blooms extends the flowering season and maintains aesthetic appeal by preventing unwanted self-seeding.
Ongoing Care
For ongoing care of Cleome hassleriana, regular watering during dry spells is crucial to help the plants thrive. Once established, however, these spider flowers become drought-tolerant, benefiting considerably from a layer of mulch that helps reduce their water needs.
Additionally, deadheading spent blooms can prolong the flowering period, enhancing the plant's overall aesthetic, while light pruning guarantees liveliness in the garden. Removing dead leaves and trimming back spindly growth by half before planting effectively stimulates new growth.
Though generally disease-resistant, it's wise to monitor for pests like aphids and spider mites, particularly because overcrowding can lead to mildew and rust. Thinning seedlings to at least 18 inches apart is essential to prevent crowding issues, promoting healthy ventilation and growth.
Regular checks for any signs of distress will enable gardeners to maintain the robustness expected from the Cleome hassleriana. Ultimately, with routine attention to watering, along with strategic deadheading and pruning, gardeners can enjoy vibrant displays of flowers that thrive through varied conditions, making these resilient plants a rewarding addition to any garden landscape.
Suggested Companions
Creating a vibrant garden with Cleome hassleriana can be enhanced by strategically choosing companion plants that complement its qualities. Tall annuals like sunflowers and hollyhocks create a layered effect, offering visual interest while supporting crucial pollinator attraction.
Employing contrasting companion colors, such as yellow marigolds or deep blue salvia, not only enriches the aesthetic but also highlights the pink, purple, or white blooms of spider flowers.
To optimize growth, spacing considerations are essential; plants should be positioned 1-3 feet apart, allowing adequate air circulation to prevent mildew and promote healthy development. Additionally, pairing Cleome with flowering herbs like lavender and bee balm will further entice beneficial pollinators, thereby enhancing biodiversity within the garden.
Moreover, the success of these companion plants hinges on aligning soil and water requirements. Opting for companions like zinnias and cosmos ensures a harmonious growing environment, as they thrive under similar conditions without competing for resources. Incorporating plants such as chicory can provide additional pollinator attraction due to its abundant and long-lasting bloom period.
Common Issues
While Cleome hassleriana generally withstands pests and diseases, specific issues can arise that require attention.
Aphids, spider mites, and whiteflies can infiltrate unsuspecting plants, necessitating vigilant monitoring and timely interventions to maintain plant health.
Additionally, conditions like powdery mildew may flourish in overcrowded environments, highlighting the importance of proper spacing and air circulation to guarantee robust growth and resilience.
Pests/Diseases
Inspecting Cleome hassleriana regularly is imperative for catching potential pest and disease issues early. While generally resilient, these plants can fall victim to common pests like aphids, spider mites, and whiteflies, necessitating vigilant monitoring.
Aphids, small sap-sucking insects, can quickly multiply and cause considerable damage if left unchecked, while spider mites thrive in dry conditions, potentially leading to leaf discoloration and decline.
In terms of diseases, powdery mildew stands out as a prevalent issue, particularly in hot, humid climates. This fungal infection manifests as a white, powdery coating on leaves, often exacerbated by overcrowding and poor air circulation.
To combat diseases such as powdery mildew and rust, it's essential to guarantee adequate spacing between plants, improving airflow and reducing humidity levels around the foliage.
Maintaining healthy soil quality and exercising caution against overwatering can also mitigate many common concerns associated with Cleome hassleriana.
Regular inspections allow gardeners to identify signs of infestations or diseases promptly, reinforcing the importance of early intervention.
Ultimately, diligent care greatly contributes to the longevity and health of these stunning Spider Flowers in any garden.
Solutions
To address common issues with Cleome hassleriana, gardeners should focus on proactive measures and routine maintenance. While this resilient plant typically withstands pests, monitoring for aphids, spider mites, and whiteflies is essential, as early intervention can mitigate any infestations.
To prevent diseases like powdery mildew and rust, adequate spacing—approximately 12 to 18 inches—between plants improves air circulation, reducing the likelihood of crowding-induced issues.
Overwatering often leads to leggy growth and can compromise overall health. Gardeners should utilize quality soil and mulch to retain moisture while reducing the need for excessive fertilization. This approach not only fosters healthy soil but also strengthens plant structure, ensuring Cleome plants thrive.
Furthermore, regular deadheading—removing spent blooms—serves a dual purpose: it encourages further flowering while also preventing unwanted self-seeding, maintaining a neat garden appearance.
Additionally, routine soil checks are crucial, as unhealthy soil can attract pests, leading to more significant challenges. Ultimately, by prioritizing these solutions, gardeners can cultivate flourishing Cleome hassleriana, allowing its graceful blooms to enhance any landscape beautifully.
Summary

Cleome hassleriana, commonly known as spider flower, is a striking annual plant that thrives in warm climates of South America. Originating from regions like Paraguay and southern Brazil, it reaches impressive heights between 3 and 6 feet.
The plant is characterized by its distinctive flower clusters, which display long, thread-like stamens, blooming in an array of colors including white, pink, rose, and purple from early summer until frost.
Preferring full sun, Cleome hassleriana grows best in well-drained soil and exhibits remarkable drought tolerance once established. Its minimal maintenance requirements make it an attractive choice for gardeners, although pinching back young plants can encourage bushier growth.
A significant benefit of Cleome lies in its ability to attract various pollinators, including hummingbirds, bees, and butterflies. This feature enhances ecological diversity and enriches the garden experience.
After blooming, the plant produces elongated seed pods, and self-seeding can occur, leading to fresh growth in the following seasons if left uncontrolled.