Ageratum, Tall Blue

Ageratum houstonianum

$6.99

Annual Size

Back for the 2026 season.

Tall Blue Flossflower is a dense herbaceous annual with a mounded form. Its medium texture blends into the garden, but can always be balanced by a couple of finer or coarser plants for an effective composition.

  • Mature Height: 30 inches
  • Mature Width: 8 inches
  • Sun: Sun to Part Sun
  • Soil Conditions: Moist

Plants are constantly growing, ever-changing, and therefore unique. The plant you receive may vary from the photo, but rest assured, it holds the same glorious potential!

Mature Height:

Mature Spread:

Sunlight Exposure: Sun

Water Needs: Moderate

We want you to be completely satisfied with your purchase and confident in your gardening experience. Plants in healthy condition may be returned within 14 days of purchase for a full refund. Non-plant items may also be returned within 14 days if unused and in original packaging. A receipt is required.

Please Note: Images on our website or tags may show plants at full maturity or in bloom. Actual plants may vary in size, maturity, and seasonal appearance at time of purchase.

At Chalet, we take pride in providing high-quality, healthy plants that are ready to thrive in your landscape. That’s why we offer a One-Year Guarantee on all eligible trees and shrubs.

What’s Covered
If Chalet planted the tree or shrub: You’ll receive a 100% replacement at no cost, including free replanting, with a plant of equal value, valid for one-time use.
If you planted it yourself: You’ll receive a 50% replacement credit toward a new plant, valid for one-time use.

What’s Not Covered
Annuals, perennials, houseplants, tropicals, and seasonal patio plants
Plants installed in containers and not planted directly in the ground
Clearance items or special-order plants
Damage due to weather, animals, neglect, improper planting, or site conditions
Replacement plants - warranty covers original purchases only

Plant Profile

Ageratum, Tall Blue

Sunlight Exposure

Sun

Water Needs

Moderate

Chalet Quality Guaranteed

Each plant is carefully selected by our horticultural experts to ensure top quality, health, and beauty—bringing the best of nature to your home

Local Delivery

Our local delivery service brings plants right to your doorstep, with expert care to ensure they arrive healthy and thriving.

Need Help?

You can make an appointment with our plant specialist for your next visit to our store, or email us.