Simply Trees

Mellow Yellow Spirea

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$88.00
 

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Once a weekFull sunDeer resistantSpring to summer
 
  • Bright Yellow Foliage: Its vibrant yellow leaves, which mature to lime-green, offer a burst of color from early spring through fall, providing long-lasting garden interest.
  • Delicate White Flowers: Small, white flowers bloom in early spring, creating a stunning contrast against the golden foliage and attracting pollinators to the garden.
  • Versatile and Low Maintenance: This spirea variety is highly adaptable, thriving in a range of soil types and conditions, with minimal pruning or care needed once established.
 

More Details

The Mellow Yellow Spirea, scientifically named Spiraea thunbergii 'Ogon' ('Mellow Yellow'), is a luminous deciduous shrub known for its striking willow-like, yellow to lime-green foliage and delicate white blooms. This early spring bloomer rejuvenates the garden with its soft, cascading branches and cheerful color, making it a perfect choice for adding brightness to borders, mixed beds, or as a standalone specimen. Easy to care for and adaptable to various conditions, the Mellow Yellow Spirea is celebrated for its versatility, drought tolerance, and the way it effortlessly brings a splash of light to any outdoor space.

Growth rate: Moderate growth rate; typically reaches 3-4 feet in height and width, making it an ideal size for a variety of garden applications.

Please note: Images on our website depict plants and trees at full maturity to showcase their expected grown characteristics. These images are illustrative examples only and do not represent the size of plants or trees upon delivery.

Pruning: Light pruning in late winter or early spring can help maintain shape and promote vigorous growth. It's also the perfect time to remove any dead or damaged branches.

Fertilization: Apply a general-purpose fertilizer in early spring to support healthy growth and flowering.

Winter Protection: Generally hardy in its specified zones, but applying a layer of mulch can help protect the roots in colder regions.


Plant in spring or fall. Select a sunny to partially shaded spot with well-draining soil. Dig a hole twice the width and the same depth as the root ball. Place the shrub in the hole, backfill with soil, and water thoroughly. Space plants about 3-4 feet apart to allow for natural spreading. Applying a layer of mulch around the base will help retain soil moisture and reduce weed competition.

Water regularly during the first growing season to establish a deep, extensive root system. After establishment, the Mellow Yellow Spirea is relatively drought-tolerant, requiring only occasional watering during prolonged dry spells. Flourishes in full sun to partial shade, with the most vibrant leaf color typically achieved in full sun exposure.

We process and ship your order as quickly as possible, typically within 1-3 business days. You will receive a shipping confirmation with tracking information once your item(s) ship.

We have perfected packaging and shipping plants & trees! That is why we DO NOT use any third-party fulfillment like most other online retailers. Your trees go straight from our farm to your door, safely packaged by our team of seasoned professionals. Our process ensures your plants leave our facility and arrive to your door in the best condition possible!

In cases of extreme cold or hot weather, we may temporarily delay shipping to ensure the well-being of your plants. Our primary focus is on delivering healthy and thriving plants to you. Rest assured, we'll make every effort to notify you of any delays promptly.

Please allow additional ship times during inclement weather and sale periods. We do not process or ship orders on the weekend or U.S. Holidays. Simply Trees is not responsible for delays due to carriers, local disruptions, or weather.

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At Simply Trees, we're committed to your satisfaction. If your plants arrive considerably damaged or sustained damage beyond the point of recovery, please contact us within five days at sales@simplytrees.store with clear photos for assistance. Our 30-day guarantee covers issues after planting, subject to our terms and conditions. We can't cover plants in the wrong climate or with inadequate care, but we're here to help in other situations. For a detailed understanding of our 30-day guarantee and how we ensure a fair process, click here to learn more.

USDA GROW ZONE:

Zones 4-8

The Mellow Yellow Spirea thrives in USDA Zones 4-8, showcasing its resilience and adaptability to different climates. Preferring well-drained soil, it excels in both full sun and partial shade, achieving the brightest foliage color in full sun. Its ability to withstand urban pollution and moderate drought conditions once established makes it a valuable addition to suburban gardens, urban landscapes, and everywhere in between.

Frequently Asked Questions

Mellow Yellow Spirea is a compact and mounding deciduous shrub that typically reaches a mature size of about 3 to 5 feet in both height and spread. However, it's essential to note that the actual size of Mellow Yellow Spirea can vary depending on environmental conditions, pruning practices, and overall plant health.

In terms of height, Mellow Yellow Spirea usually grows to be slightly taller than it is wide, forming a rounded or mounded shape. The arching branches bear clusters of small white flowers in early spring, adding to the shrub's ornamental appeal.

When planting Mellow Yellow Spirea, it's essential to provide adequate space for the shrub to reach its mature size without overcrowding. Proper spacing ensures that the plant has room to grow and develop its full form while allowing for good airflow and sunlight penetration.

Regular pruning can also help maintain the desired size and shape of Mellow Yellow Spirea, as well as promote flowering and overall plant health. By following recommended pruning techniques and providing proper care, you can enjoy the attractive foliage and delicate blooms of Mellow Yellow Spirea in your landscape.

Mellow Yellow Spirea is known for its relatively fast growth rate, especially in its early years. Under optimal growing conditions, this cultivar can grow at a moderate to fast pace, typically adding several inches to its height and spread each year.

On average, Mellow Yellow Spirea can reach a mature height of around 3 to 5 feet with a similar spread over a period of 5 to 10 years. However, growth rates can vary depending on factors such as climate, soil quality, sunlight exposure, and moisture levels.

During its initial establishment phase, Mellow Yellow Spirea may exhibit more rapid growth as it establishes its root system and establishes itself in its new environment. Once established, the growth rate may stabilize somewhat but still remain relatively vigorous compared to some other shrubs.

To encourage healthy growth and maintain the desired size and shape of Mellow Yellow Spirea, regular pruning and proper maintenance are essential. Additionally, providing adequate sunlight, water, and nutrients will help promote optimal growth and overall plant health.

Planting Mellow Yellow Spirea is a straightforward process, but it's essential to provide the right conditions for the shrub to establish itself successfully. Here's a step-by-step guide on how to plant Mellow Yellow Spirea:

Choose a Suitable Location:
- Select a planting location that receives full sun to partial shade. Ensure the area has well-draining soil to prevent waterlogging, as Mellow Yellow Spirea prefers moist but not waterlogged soil.
- Consider the mature size of the shrub and provide adequate space for it to grow and spread comfortably.

Prepare the Soil:
- Before planting, prepare the soil by loosening it to a depth of about 12 inches and incorporating organic matter such as compost or aged manure. This improves soil structure, fertility, and drainage.
- Remove any weeds, rocks, or debris from the planting area to provide a clean start for the Spirea.

Dig the Planting Hole:
- Dig a hole that is slightly wider and as deep as the root ball of the Mellow Yellow Spirea shrub. The hole should be large enough to accommodate the roots without bending or crowding.
- If planting multiple shrubs, space the planting holes according to the recommended spacing for Mellow Yellow Spirea.

Plant the Shrub:
- Carefully remove the Mellow Yellow Spirea from its container and gently loosen the roots if they are pot-bound. Place the shrub in the center of the planting hole, ensuring that the top of the root ball is level with the surrounding soil.
- Backfill the hole with the excavated soil, gently firming it around the roots to eliminate air pockets. Water the plant thoroughly to settle the soil and provide initial hydration to the roots.

Mulch and Water:
- Apply a 2- to 3-inch layer of organic mulch, such as shredded bark or compost, around the base of the Spirea plant. Mulch helps retain soil moisture, suppress weeds, and regulate soil temperature.
- Water the newly planted Mellow Yellow Spirea deeply immediately after planting and continue to water regularly, especially during dry periods, to keep the soil consistently moist but not waterlogged.

Monitor and Maintain:
- Monitor the Mellow Yellow Spirea regularly for signs of stress, such as wilting or yellowing leaves, and adjust watering as needed. Provide additional water during periods of hot weather or drought.
- Perform routine maintenance tasks such as pruning, fertilizing, and pest control to keep the Spirea healthy and thriving in its new location.

By following these planting guidelines, you can help ensure the successful establishment and growth of Mellow Yellow Spirea in your landscape.

Mellow Yellow Spirea, like other Spirea varieties, generally requires adequate space to grow and spread comfortably while maintaining its shape and vigor. Here are some guidelines for spacing Mellow Yellow Spirea effectively:

Spacing between Plants: When planting multiple Mellow Yellow Spirea shrubs, space them approximately 2 to 4 feet apart, center to center. This spacing allows the plants to spread and fill in the space while providing ample airflow and room for each plant to grow without overcrowding.

Spacing from Other Plants: Consider the mature size of Mellow Yellow Spirea when determining its spacing from other plants in your landscape. Avoid planting it too close to large shrubs or trees that could shade or compete with it for resources. Providing adequate space around the plant allows it to receive sufficient sunlight, water, and nutrients for optimal growth.

Consider Mature Size: Mellow Yellow Spirea typically grows to a mature height and spread of around 3 to 5 feet. When spacing the plants, consider their eventual size and give them room to reach their full potential without being cramped or overcrowded.

Adjust Spacing for Desired Effect: Depending on your landscaping goals and preferences, you may choose to space Mellow Yellow Spirea plants closer together for a more densely planted look or farther apart for a more open and airy appearance. Consider the overall design of your landscape and the desired effect when determining spacing.

Maintenance Considerations: Adequate spacing between Mellow Yellow Spirea plants makes it easier to perform maintenance tasks such as pruning, watering, and mulching. It also helps reduce the risk of disease and pest problems by promoting good airflow and preventing overcrowding.

By spacing Mellow Yellow Spirea plants appropriately, you can ensure they have room to thrive and contribute to a beautiful and healthy landscape.

Mellow Yellow Spirea generally prefers full sun to partial shade. While it can tolerate some shade, especially in hot climates, it typically performs best and exhibits its most vibrant foliage color when grown in full sun.

Here's a breakdown of sun and shade preferences for Mellow Yellow Spirea:

Full Sun: Planting Mellow Yellow Spirea in a location that receives full sun for most of the day (at least 6 to 8 hours of direct sunlight) is ideal. In full sun, the plant typically produces the brightest yellow foliage and abundant flowers.

Partial Shade: While Mellow Yellow Spirea prefers full sun, it can tolerate partial shade, particularly in regions with hot summers. Partial shade refers to locations that receive filtered sunlight or dappled shade for part of the day, such as areas with morning sun and afternoon shade or under the canopy of deciduous trees.

Considerations: When selecting a planting location for Mellow Yellow Spirea, consider the local climate and microclimate conditions in your garden. In cooler climates or regions with intense sunlight, providing some afternoon shade can help protect the plant from excessive heat stress. However, avoid planting Mellow Yellow Spirea in deep shade, as this can result in reduced flowering and less vibrant foliage color.

Overall, while Mellow Yellow Spirea is adaptable to a range of light conditions, providing full sun or partial shade will help ensure the plant's health, vigor, and aesthetic appeal in your landscape.

Pruning Mellow Yellow Spirea is relatively simple and is typically done to maintain the plant's shape, size, and vigor, as well as to encourage flowering. Here are the steps to prune Mellow Yellow Spirea effectively:

Timing: Prune Mellow Yellow Spirea in late winter to early spring, before new growth emerges. This timing allows you to remove dead, damaged, or crossing branches and shape the plant before the growing season begins.

Assess the Plant: Begin by inspecting the Spirea plant and identifying any dead, diseased, or damaged branches. Also, look for any branches that are crossing or rubbing against each other, as well as any overly dense areas that may inhibit airflow.

Remove Dead or Damaged Branches: Using clean and sharp pruning shears, carefully cut out any dead, diseased, or damaged branches at their base, where they meet the main stem or another branch. Make clean cuts at a slight angle to promote healing.

Thinning: To improve airflow and light penetration throughout the plant, selectively remove some of the older, thicker branches. Focus on removing branches from the interior of the plant rather than cutting back from the outside.

Shaping: If desired, shape the Mellow Yellow Spirea by selectively pruning branches to maintain its desired size and form. Avoid cutting more than one-third of the plant's total growth in a single pruning session to avoid stressing the plant.

Deadheading: After the first flush of flowering in spring, consider deadheading spent flowers to encourage additional blooms and prolong the flowering period. Use pruners to remove the faded flowers just below the base of the flower cluster.

Cleanup: Once pruning is complete, remove any debris from around the base of the plant and dispose of it properly. This helps prevent the buildup of pests and diseases and maintains a tidy appearance.

Mulching and Watering: After pruning, apply a layer of organic mulch around the base of the plant to help retain moisture and suppress weeds. Water the plant thoroughly, especially during dry periods, to promote new growth and recovery.

By following these pruning guidelines, you can help maintain the health, vigor, and aesthetic appeal of your Mellow Yellow Spirea throughout the growing season.

Caring for Mellow Yellow Spirea involves providing the appropriate growing conditions and regular maintenance to ensure the health and vitality of the plant. Here are some care tips for this particular Spirea cultivar:

Sunlight: Plant Mellow Yellow Spirea in a location that receives full sun to partial shade. While it can tolerate some shade, the plant typically produces the best foliage color and flowering when grown in full sun.

Soil: Ensure the soil is well-draining and fertile. Mellow Yellow Spirea prefers moist, but not waterlogged, soil. Amend heavy clay soils with organic matter such as compost to improve drainage and soil structure.

Watering: Water newly planted Mellow Yellow Spirea regularly to establish a strong root system. Once established, water deeply during dry periods, providing approximately 1 inch of water per week, especially during hot weather.

Mulching: Apply a 2- to 3-inch layer of organic mulch, such as shredded bark or compost, around the base of the plant to help retain soil moisture, suppress weeds, and moderate soil temperature.

Fertilizing: Apply a balanced, all-purpose fertilizer in early spring before new growth begins. Follow the manufacturer's instructions regarding application rates and frequency. Avoid over-fertilizing, as this can lead to excessive foliage growth at the expense of flowering.

Pruning: Mellow Yellow Spirea generally requires minimal pruning, but you can prune lightly after flowering to maintain shape and remove any dead or damaged branches. Avoid heavy pruning, as this can reduce flowering the following season.

Pest and Disease Control: Monitor the plant regularly for signs of pests, such as aphids or spider mites, and treat them promptly if detected. Mellow Yellow Spirea is relatively resistant to most diseases, but good air circulation and proper spacing can help prevent issues such as powdery mildew.

Winter Care: In colder climates, provide winter protection for young plants by mulching around the base and covering with burlap or other protective material. Established plants are generally cold-hardy but may benefit from mulching to protect roots from freezing temperatures.

By following these care tips, you can help ensure that Mellow Yellow Spirea remains healthy, vibrant, and a beautiful addition to your landscape.

Mellow Yellow Spirea is generally tolerant of a wide range of temperatures, but it performs best within specific temperature ranges. Here's a guideline for the temperature tolerance of this particular Spirea cultivar:

Hardiness Zone: Mellow Yellow Spirea is typically hardy in USDA Hardiness Zones 4 to 8. This means it can withstand minimum winter temperatures ranging from -30°F (-34°C) in Zone 4 to 20°F (-7°C) in Zone 8.

Cold Tolerance: Mellow Yellow Spirea is relatively cold-hardy and can tolerate freezing temperatures typical of winter climates in its recommended hardiness zones. However, young plants may benefit from winter protection, such as mulching around the base of the plant, in colder regions to prevent frost heaving and root damage.

Heat Tolerance: While Mellow Yellow Spirea can tolerate moderate heat, it generally prefers cooler temperatures and may suffer in extreme heat, especially if combined with high humidity. Providing afternoon shade in hot climates can help protect the plant from excessive heat stress.

Optimal Growing Conditions: Mellow Yellow Spirea thrives in temperatures ranging from 60°F to 75°F (15°C to 24°C) during the growing season. These moderate temperatures support vigorous growth, healthy foliage, and abundant flowering.

Temperature Fluctuations: While Mellow Yellow Spirea can tolerate fluctuations in temperature, sudden temperature extremes, such as rapid drops in temperature or late spring frosts after new growth has emerged, may cause temporary stress to the plant.

Overall, Mellow Yellow Spirea is adaptable to a range of temperatures within its recommended hardiness zones. Providing adequate winter protection in colder regions and afternoon shade in hot climates can help ensure the plant's health and vitality throughout the year.

To promote healthy growth and abundant flowering in Spiraea, it's essential to provide the appropriate fertilizer. Here's what you should consider when selecting a fertilizer for Spirea:

Balanced Fertilizer: Choose a balanced, all-purpose fertilizer with equal parts of nitrogen (N), phosphorus (P), and potassium (K), such as a 10-10-10 or 20-20-20 formulation. This type of fertilizer provides essential nutrients for overall plant growth, root development, and flower production.

Slow-Release or Granular Fertilizer: Opt for a slow-release or granular fertilizer designed for shrubs and perennials. These types of fertilizers release nutrients gradually over time, providing a steady supply of nourishment to the Spirea plant without the risk of fertilizer burn.

Application Rate: Follow the manufacturer's instructions regarding the application rate and frequency of fertilization. Typically, you'll apply the fertilizer around the base of the Spirea plant, avoiding direct contact with the foliage, and then water thoroughly to help the nutrients penetrate the soil.

Timing: Apply fertilizer to Spirea plants in early spring, just before new growth begins, or in late winter to early spring before the growing season. This timing allows the plant to utilize the nutrients efficiently as it enters its active growth phase.

Additional Considerations: Consider the specific needs of your Spirea plant and its growing conditions when selecting a fertilizer. For example, if the soil is deficient in certain nutrients, you may choose a fertilizer formulated to address those deficiencies. Additionally, if the Spirea plant is flowering poorly or showing signs of nutrient deficiencies, a fertilizer with higher phosphorus content may be beneficial to encourage blooming.

Organic Options: If you prefer organic gardening practices, you can use organic fertilizers such as compost, aged manure, or fish emulsion. These natural fertilizers provide nutrients to the soil and promote overall soil health, but they may require more frequent applications compared to synthetic fertilizers.

By choosing the right fertilizer and following proper application practices, you can ensure that your Spiraea receives the necessary nutrients for vigorous growth, vibrant foliage, and abundant flowering.

Planting Spirea in a pot can be a great way to enjoy its beautiful foliage and delicate blooms on a patio, balcony, or any outdoor space. Here's how to plant Spirea in a pot:

Select a Suitable Pot: Choose a pot or container with drainage holes at the bottom to ensure proper drainage. The size of the pot should accommodate the mature size of the Spirea plant and allow room for root development.

Fill the Pot with Potting Mix: Use a high-quality, well-draining potting mix suited for outdoor container gardening. Fill the pot about halfway with the potting mix, leaving enough space to accommodate the root ball of the Spirea plant.

Prepare the Spirea Plant: Gently remove the Spirea plant from its nursery container. If the roots are tightly bound, carefully loosen them to encourage outward growth. Inspect the plant for any damaged or dead roots and trim as needed.

Plant the Spirea: Place the Spirea plant in the center of the pot, ensuring that the top of the root ball is level with the rim of the pot. Add more potting mix around the root ball, pressing lightly to secure the plant in place.

Water Thoroughly: After planting, water the Spirea thoroughly to settle the soil and eliminate air pockets around the roots. Ensure that water drains freely from the bottom of the pot, indicating proper drainage.

Place in the Desired Location: Choose a location for the potted Spirea that receives ample sunlight for optimal growth and flowering. Spirea generally prefers full sun to partial shade for best performance.

Water and Maintain: Water the potted Spirea regularly to keep the soil evenly moist, especially during hot, dry periods. Check the soil moisture regularly and adjust watering frequency as needed. Apply a balanced fertilizer according to the manufacturer's instructions during the growing season to promote healthy growth and blooming.

Monitor for Pests and Diseases: Keep an eye out for common pests such as aphids, spider mites, or powdery mildew, and treat them promptly if detected. Prune the Spirea plant as needed to maintain its shape and size, and remove any dead or diseased foliage.

By following these steps, you can successfully plant Spirea in a pot and enjoy its beauty in your outdoor space.

Our Process

We have perfected packaging and shipping plants & trees! That is why we DO NOT use any third-party fulfillment like most other online retailers. Your trees go straight from our farm to your door, safely packaged by our team of seasoned professionals. Our process ensures your plants leave our facility and arrive to your door in the best condition possible!