Plant Encyclopedia

Blue Puffball™ Chastetree

Vitex agnus-castus 'PIIVAC-II'

Learn more

The Landscaper's 

AVN succeeds by helping you & your business succeed.

  • 6 Locations

  • Plant Experts

  • +100 years in the industry

  • +2000 Plants

Blue Puffball™ Chastetree

Discover More Information On Blue Puffball™ Chastetree

Genetically compact, Blue Puffball™ Chastetree forms a perfect ball-shaped plant with short internodes and thick foliage. Mid-green foliage is clean into fall with minimal leaf spot. Deep blue, fragrant flowers bloom from June to September. Blue Puffball™ flowers form on new growth so it can be used as a dieback shrub in colder areas. Like all chastetree, it prefers well-drained soils, is salt tolerant, and deer resistant. Bred by Plant Introductions, Inc.

Plant Attributes

The Blue Puffball™ Chastetree, scientifically known as Vitex agnus-castus, is an enchanting flowering shrub that is highly prized for its stunning blue blossoms and unique plant attributes. This cultivar of the chastetree species is specifically bred to exhibit a compact growth habit and prolific flowering, making it a popular choice among gardeners and landscape designers.

One of the most distinctive attributes of the Blue Puffball™ Chastetree is its striking blue flowers. These delicate blossoms are arranged in dense clusters, resembling fluffy puffballs, and create a breathtaking display of color when the shrub is in full bloom. The vibrant blue hue adds a touch of elegance to any garden or landscape, attracting bees, butterflies, and other pollinators.

In terms of its growth habit, the Blue Puffball™ Chastetree typically forms a compact and rounded shape, reaching a height of about 4 to 6 feet (1.2 to 1.8 meters) and a similar spread. Its dense foliage consists of aromatic, palmate leaves with a dark green color, providing an attractive backdrop to the vibrant blue flowers.

Another noteworthy attribute of this cultivar is its adaptability and resilience. The Blue Puffball™ Chastetree is known for its tolerance to a wide range of soil conditions, including clay, loam, and sandy soils, as well as its ability to withstand drought once established. It is also relatively low-maintenance, requiring minimal pruning and being resistant to most common pests and diseases.

Landscape Use

The Blue Puffball™ Chastetree is a versatile shrub that offers various landscaping uses, making it a valuable addition to any garden or landscape design. Here are some of the common ways this plant can be used:

  1. Ornamental Focal Point: With its vibrant blue flowers and compact growth habit, the Blue Puffball™ Chastetree makes a stunning focal point in garden beds or as a standalone specimen plant. Its eye-catching blossoms draw attention and create a visually appealing centerpiece.
  2. Borders and Hedges: The shrub's rounded shape and dense foliage make it ideal for creating borders and hedges. Planting multiple Blue Puffball™ Chastetrees in a row can form an attractive hedge, providing privacy, defining garden spaces, and adding a touch of color when in bloom.
  3. Mixed Shrub Plantings: This chastetree cultivar works well in mixed shrub plantings, where it can be combined with other flowering or evergreen shrubs. Its blue flowers act as a beautiful complement to other plants, adding depth and interest to the landscape.
  4. Pollinator Gardens: The Blue Puffball™ Chastetree's flowers are a magnet for bees, butterflies, and other pollinators. By incorporating this shrub into pollinator-friendly gardens, you can support the local ecosystem and enjoy the sight of buzzing activity.
  5. Urban Landscapes: Due to its compact size and adaptability to different soil conditions, the Blue Puffball™ Chastetree is suitable for urban landscapes, including residential gardens, parks, and public spaces. Its low-maintenance nature makes it a convenient choice for city environments.
  6. Mediterranean or Cottage Gardens: The chastetree species is native to the Mediterranean region, and the Blue Puffball™ Chastetree can bring a touch of that aesthetic to Mediterranean-style or cottage gardens. Its beautiful flowers and aromatic foliage create a charming, rustic ambiance.

Remember to consider the specific climate and growing conditions of your region when incorporating the Blue Puffball™ Chastetree into your landscaping plans. Providing adequate sunlight, well-drained soil, and occasional watering will help ensure its healthy growth and abundant blooms.

Planting & Care

Planting and caring for the Blue Puffball™ Chastetree is relatively straightforward. Here are some guidelines to help you with the process:


- Choose a location that receives full sun to partial shade. The Blue Puffball™ Chastetree thrives in sunlight but can tolerate some shade.

- Ensure the soil is well-drained and of average fertility. Amend heavy clay soils with organic matter to improve drainage.

- Dig a hole that is slightly wider and at the same depth as the root ball of the plant.

- Place the shrub in the hole and backfill with soil, gently firming it around the roots.

- Water thoroughly after planting to settle the soil and help the plant establish.


- Water the Blue Puffball™ Chastetree regularly during its first growing season to promote establishment. Keep the soil consistently moist but not waterlogged.

- Once established, the shrub is moderately drought-tolerant and can withstand periods of dryness. Water deeply but infrequently, allowing the soil to dry out slightly between watering sessions.


- Pruning is generally minimal for the Blue Puffball™ Chastetree. Light pruning in early spring can help shape the shrub and remove any dead or damaged branches.

- If desired, you can also remove spent flowers to encourage prolonged blooming.

- Avoid heavy pruning, as the shrub blooms on new wood.


- The Blue Puffball™ Chastetree is not a heavy feeder and typically does well without excessive fertilization.

- If the soil is poor or lacking in nutrients, you can apply a balanced, slow-release fertilizer in early spring. Follow the manufacturer's instructions for application rates.

Pests and Diseases:

- The Blue Puffball™ Chastetree is generally resistant to pests and diseases. However, like any plant, it may occasionally encounter issues such as aphids or spider mites.

- Monitor the shrub regularly for signs of pests or diseases and take appropriate measures if necessary, such as using insecticidal soap or horticultural oils.

Winter Care:

- In regions with cold winters, the Blue Puffball™ Chastetree may benefit from a layer of mulch around the base of the plant to help protect the roots from freezing temperatures.

- Mulch also helps conserve moisture and suppress weed growth.

By following these planting and care instructions, you can ensure the healthy growth and long-lasting beauty of your Blue Puffball™ Chastetree.

Additional Information

Interested in

Blue Puffball™ Chastetree


Plant Features

  • Height: 3'
  • Width: 3'
  • Hardiness Zone: 6-9
  • Heat Zone: 9
  • Exposure: Full Sun
  • Habit: Rounded
  • Flower Color: Blue
  • Foliage: Bright Green

Interested in a particular plant or have questions?
Please don't hesitate to contact us via this form or email, and we will reply as soon as possible.

Message sent! Thank you.

An error has occurred somewhere and it is not possible to submit the form. Please try again later or contact us via email.