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How to Grow and Care for Spider Mums

How to Grow and Care for Spider Mums

Discover the captivating world of spider mums and learn how to grow and care for these unique flowers in your garden or home. This comprehensive guide covers everything from planting and watering to pruning and overwintering to help your spider mums thrive. Become a spider mum expert with these practical tips.

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If you’re looking to add a touch of intriguing, architectural beauty to your garden or indoor space, the spider mums might just be the plant you’ve been searching for. With their long, spindly petals and striking, alien-like appearance, these captivating flowers are sure to turn heads and spark conversations.

But don’t let their otherworldly look fool you – spider mums are not only visually stunning, but they are also relatively easy to grow and care for, making them an excellent choice for both novice and experienced gardeners alike. Whether you’re planning to cultivate them outdoors or bring their enchanting presence indoors, this comprehensive guide will provide you with all the information you need to help your spider mums flourish.

Unveiling the Spider Mums

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Spider mums, also known as Chrysanthemum × morifolium ‘Spider’, are a unique type of chrysanthemum that feature long, thin, spidery-like petals. These unusual blooms are part of the Asteraceae family, which includes other well-known plants such as sunflowers and daisies.

Spider mums come in a wide range of colors, including white, yellow, pink, lavender, and bronze. Their unique, spidery appearance makes them a standout addition to bouquets, floral arrangements, and garden displays.

One of the most distinctive features of spider mums is their long, tubular petals that can grow up to 6 inches in length. These delicate, thread-like petals radiate outward from the flower’s center, creating a mesmerizing, almost hypnotic effect.

Growing Conditions for Spider Mums

To ensure your spider mums thrive, it’s essential to provide them with the right growing conditions. Let’s explore the key factors to consider:

Light Requirements

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Spider mums prefer full sun, meaning they need at least 6 hours of direct sunlight per day. If you’re growing them indoors, place your spider mums in a spot that receives bright, indirect light near a south- or west-facing window.

Avoid shady or heavily shaded areas, as this can impact the plant’s growth, flowering, and overall health. Spider mums that don’t receive enough light may become leggy, produce fewer blooms, and have a reduced lifespan.

Soil and Drainage

Spider mums thrive in well-draining, nutrient-rich soil. They prefer a slightly acidic to neutral pH, typically between 6.0 and 7.0.

Amend your soil by incorporating compost or aged manure to improve drainage and provide essential nutrients. Avoid heavy, clay-based soils that can become waterlogged, as this can lead to root rot and other issues.

Temperature and Humidity

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Spider mums prefer moderate temperatures, typically between 65°F and 75°F (18°C to 24°C) during the day and 50°F to 60°F (10°C to 16°C) at night. Sudden or extreme temperature fluctuations can stress the plants and affect their growth and flowering.

In terms of humidity, spider mums [thrive in moderate to high humidity levels, ideally between 50% and 70%. If you’re growing them indoors, consider using a pebble tray or a humidifier to help maintain the ideal humidity conditions.

Planting and Propagating

Spider Mums Whether you’re starting from seed, dividing an existing plant, or purchasing a nursery-grown spider mum, there are a few key steps to ensure successful planting and propagation.

Planting Spider Mum Seeds If you’re growing spider mums from seed, the best time to sow them is in the early spring, typically 8 to 10 weeks before your last expected frost date. Sow the seeds in a well-draining seed-starting mix and keep the soil consistently moist until the seeds germinate, which can take 2 to 4 weeks.

Once the seedlings have developed their first set of true leaves, transplant them into individual pots or directly into your garden, spacing them about 18 to 24 inches apart. Be sure to harden off the plants by gradually exposing them to more sunlight and lower humidity before transplanting them outdoors.

Dividing and Transplanting Spider Mums

Established spider mum plants can be divided and transplanted in the spring or fall, when the plants are actively growing. This will help maintain their vigor and encourage new growth.

To divide a spider mum, carefully dig up the entire plant, making sure to get as much of the root system as possible. Use a sharp, clean knife or garden shears to divide the plant into smaller sections, each with its own roots and foliage. Replant the divided sections in their new locations, spacing them about 18 to 24 inches apart.

Watering and Caring for Spider Mums

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Proper watering and ongoing care are essential for the long-term health and success of your spider mum plants. Here’s what you need to know:

Watering Requirements

Spider mums prefer consistently moist, but not waterlogged, soil. Water your plants when the top inch or two of soil becomes dry, typically about once a week or every 7 to 10 days.

Be sure to water the plants thoroughly, allowing the water to soak into the soil and reach the roots. Avoid allowing the soil to become completely dry, as this can stress the plants and affect their growth and flowering.

Mulching Applying a 2-3 inch layer of organic mulch around the base of your spider mum plants can help retain moisture, suppress weeds, and insulate the roots from temperature fluctuations.

Good mulching options include shredded bark, wood chips, or leaf litter. Avoid using thick, heavy mulches that can prevent air and water from reaching the roots.


Spider mums benefit from regular fertilization to support their growth and blooming. Use a balanced, water-soluble fertilizer every 4 to 6 weeks during the growing season, following the manufacturer’s instructions for application rates.

Alternatively, you can top-dress the soil around your spider mum plants with a slow-release organic fertilizer or compost in the spring. This will provide a steady supply of nutrients throughout the growing season.

Deadheading and Pruning

To encourage continued blooming and maintain the overall appearance of your spider mum plants, deadhead (remove spent flowers) regularly throughout the growing season. This will prevent the plant from putting energy into seed production and instead focus on producing new flowers.

In the fall or early spring, you can also prune back the foliage to about 6 inches above the ground. This will help keep the plants tidy and promote fresh, vigorous growth in the following season.

Overwintering Spider Mums

Spider mums are generally hardy perennials that can survive the winter in USDA Hardiness Zones 5-9. However, they may require some additional care and protection during the colder months.

For outdoor spider mum plants, apply a 2-3 inch layer of mulch around the base of the plants in the fall to insulate the roots and prevent heaving. You can also cover the plants with a thick layer of leaves or straw for added protection.

If you’re growing spider mums in containers, move them to a protected area such as a garage or unheated shed during the winter. Reduce watering and allow the soil to dry out slightly between waterings to prevent rot.

In early spring, remove any winter protection and resume your regular watering and care routine to prepare the plants for the growing season.

Common Pests and Diseases

While spider mums are generally quite hardy, they can still be susceptible to certain pests and diseases. Keep an eye out for the following issues and address them promptly:



To address these issues, consider using organic pest control methods or fungicides labeled for use on spider mums. Always follow the manufacturer’s instructions carefully.

Potential Uses and Benefits of Spider Mums

Beyond their stunning visual appeal, spider mums offer several benefits and potential uses in the garden and beyond. Let’s explore a few of them:

Cut Flowers

The unique, spidery blooms of spider mums make for beautiful and long-lasting cut flowers. They can be used in a variety of floral arrangements, both fresh and dried, adding a touch of architectural interest and drama to bouquets and centerpieces.

If you plan to grow spider mums for cut flowers, be sure to deadhead the spent blooms regularly to encourage more flower production throughout the season. When harvesting the flowers, cut the stems in the morning and place them in water immediately to help them last longer.

Pollinator Attraction Spider mums are attractive to a variety of pollinators, including bees, butterflies, and hummingbirds. Their nectar-rich flowers provide an important food source for these vital creatures, helping to support local pollinator populations.

If you’re looking to create a pollinator-friendly garden, spider mums make an excellent addition, complementing other nectar-rich perennials and annuals.

Landscaping and Garden Design

Spider mums can be a valuable addition to a variety of garden styles and landscapes. Their late-summer to fall blooming period makes them a great choice for adding color and interest to the garden when many other plants are starting to fade.

Spider mums work well in sunny borders, cottage gardens, and cut-flower gardens. Their upright, bushy growth habit also makes them a nice addition to container plantings and mixed beds.

When incorporating spider mums into your garden design, consider pairing them with other late-blooming perennials, such as asters, dahlias, or cosmos. The contrasting textures and bloom times can create a visually striking and harmonious display.

Cultivars and Varieties of Spider Mums

While the classic white spider mum is a popular choice, there are several other cultivars and species of spider mums that offer unique features and color variations:

Yellow Spider Mum (Chrysanthemum × morifolium ‘Yellow Spider’):

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This variety features bright, sunny yellow blooms that add a cheerful pop of color to the garden.

Pink Spider Mum (Chrysanthemum × morifolium ‘Pink Spider’):

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With its delicate, pink-tinged petals, this cultivar adds a softer, more romantic touch to floral arrangements and garden displays.

Lavender Spider Mum (Chrysanthemum × morifolium ‘Lavender Spider’):

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This variety showcases a lovely, muted lavender hue that complements a wide range of garden styles.

Bronze Spider Mum (Chrysanthemum × morifolium ‘Bronze Spider’):

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For a warm, earthy touch, the bronze spider mum offers rich, coppery-toned petals that stand out beautifully.

When selecting spider mums for your garden, consider the color, size, and growth habit that will best suit your landscape and personal preferences. Experiment with different varieties to add unique visual interest and diversity to your outdoor space.

Incorporating Spider Mums into Your Garden

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Whether you’re a seasoned gardener or just starting to explore the world of perennials, spider mums offer a delightful and rewarding addition to any landscape. Their low-maintenance requirements, pollinator-friendly benefits, and striking visual appeal make them a versatile choice for a wide range of garden styles and settings.

As you embark on your spider mum growing journey, remember to provide the right growing conditions, care for your plants diligently, and experiment with different cultivars to find the ones that truly captivate you. With a little patience and attention, you’ll be rewarded with a stunning display of these unique and enchanting blooms year after year.

So, what are you waiting for? Dive into the world of spider mums and let their otherworldly beauty transform your garden into a truly captivating oasis!

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