Blue Boa Anise Hyssop

Availability: Out of stock

The perfect finishing touch for your garden! Like an expensive string of pearls or a fancy feather boa, Agastache Blue Boa (Agastache x 'Blue Boa') provides that certain something special to your garden beds and borders! Blue Boa is a lovely gentian-blue to violet-purple color that complements every other color in your garden.

Agastache originates from the Greek word 'aga', meaning 'very much', and 'stachys', meaning 'spikes', referring to the many flower spikes. Anise Hyssop essential oil is said to have purifying benefits, and its chemical compounds display antibacterial and antifungal properties. Hyssop is mentioned in the Bible and has a long history in culinary, medicinal, and historical uses.

Once the dark green leaves are dried and steeped, they also make a delicious, refreshing tea - either hot or iced or infused in water. It's fun to use its edible flowers either fresh or dried to flavor fruit salad, pasta, and salad. Don't forget to snip a few for your indoor bouquets!

Agastache in general is a healthy perennial that is covered in flower spikes from early summer to late fall. Blue Boa particularly is an award-winning cultivar that is tremendously heat and humidity tolerant and will bloom for you early and often! Hardy throughout USDA growing zones 5 through 9.

Planting and Application:

Many long-time landscape designers claim that every garden should be bordered in blue, instead of green or white, and very few plants with blue flowers are as excellent for bedding as Agastache! Allow your guests to brush against the scented foliage to layer in an important fragrance element in your design. Sensory gardens, and Kitchen and Herb gardens are great locations for a Hyssop!

Use Hyssop to add pops of late-season color to your late-season herb, perennial, and pollinator gardens, still blooming long after many other plants are finished. It not only looks terrific, but it's also a mainstay for beneficial pollinators and our precious native bee populations. No Butterfly Garden would be complete without Anise Hyssop! Send migrating Monarchs on their way south with a good nectar resource.

If you have a sunny perennial border, you'll want to use these in the mid-ground for a big boost of color. Partner these wand-like flowers with other herbs for height and backdrops that look great through the season. Install your own Cottage Garden or add color to a Rock Garden in the front yard. Hyssop can be grown along walkways and paths. Grow the plants in-ground, or use them as Fillers in large, seasonal containers!

  • Superior Wands of Violet-Blue Flowers
  • Minty-Licorice Fragrant & Aromatic Foliage
  • Incredible Butterfly Magnet & Hummingbirds too
  • Compact & Easy to Grow
  • Containers, Herb Gardens, Pollinator Beds & Long-Lasting Late-Season Color

#ProPlantTips for Care:

This variety of Hyssop is more tolerant of cold winters and wet soil. However, in the coldest growing zones, give it a sheltered spot. Plant this handsome low-maintenance clumping perennial in a sunny location. They do best in full sun to partial sun exposure, in well-drained soils. The drying power of the morning sun keeps the scented foliage healthy and mildew-free!

Tolerant of drier soil and xeric locations once established, Hyssop can be highly drought-tolerant, but you'll get the best performance with a regular schedule of supplemental water. Use a consistent watering schedule for plants growing in containers. Although this plant does well in thin, poor soil, we do recommend you protect your investment and encourage healthy roots by using Nature Hills Root Booster at planting time to help your plant uptake nutrients in the soil more efficiently.

Blue Boa reaches a mature height of 2-3 feet and spreads to under 2 feet wide, but you can pinch back the plants before they bloom to keep them smaller and more compact. Deadhead to prevent seed dispersal and keep the plant neat and tidy. Prune back the stems in late fall, mulch the crown well, and water in well for the winter.

  • Loves Full Sun
  • Best in Very Well-Drained Soil
  • Moderate to Low Moisture Once Established
  • Fast-Growing!
  • Widely Adaptable
  • Rarely Damaged by Deer

Don't let another season go by without the beautiful violet-blue spikes of Agastache Blue Boa Anise Hyssop topping off your garden beds and borders this year! Order yours today at!

Buying Options for Plants

Nature Hills sells a large variety of plants with several options available. Plants are offered in both potted containers and as dormant bare root without soil. Here is a helpful resource to understand your options as you create a beautiful landscape with help from Nature Hills.

Ever wonder what a larger plant will mean for your landscape? Container Sizes are really all about the age of the plant!

Seasonally, Nature Hills offers hand selected, high quality bare root trees, shrubs and perennials. Bare root plants are sold by height from the top of the root system to the top of the plant. Plants may be taller than the height minimums.

  • Popular sizes of select trees are 1 foot, 2 feet, 3 feet, etc.
  • Popular sizes of select bare root plants is 1 foot, 18 inches, etc.

Nature Hills Container Size by Volume

Keep in mind, specific varieties and different growing conditions can affect the rate at which plants grow. Variations in size may occur.

Young Plants to 18 Months
Size Volume
2"x2"x3" Ranges from .18 to .21 dry quarts / .198 to .23 dry liters in volume
4.5" Container Equal to .65 dry quart / .72 dry liter in volume
Sprinter Pot Equal to .63 dry quart / .69 dry liter in volume
4" Container Ranges from .31 to .87 / .35 to .96 dry liter in volume
6" Container Equal to 1.4 dry quarts / 1.59 dry liters in volume
1 Quart Equal to 1 dry quart / 1.1 dry liter in volume
5.5" Container Equal to 1.89 of a dry quart / 2.08 dry liters in volume
4"x4"x5" Ranges from .8 to 1.1 dry quarts / .88 to 1.2 dry liters in volume
4"x4"x6" Ranges from 1.0 to 1.3 dry quarts / 1.1 to 1.41 dry liters in volume
4"x4"x9" Ranges from 1.1 to 2.1 dry quarts / 1.2 to 2.3 dry liters in volume
4"x4"x10" Ranges from 1.7 to 2.3 dry quart / 1.87 to 2.53 dry liters in volume
Plants 18 Months - 2.5 Years Old
Size Volume
2 Quart Equal to 2 dry quarts / 2.2 dry liters in volume
#1 Container Ranges from 2.26 to 3.73 dry quarts / 2.49 to 4.11 dry liters in volume
5"x5"x12" Equal to 3.5 to 4.3 dry quarts / 3.85 to 4.74 dry liters in volume
Plants 2 - 4 Years Old
Size Volume
#2 Container Ranges from 1.19 to 1.76 dry gallons / 5.24 to 7.75 dry liters in volume
#3 Container Ranges from 2.32 to 2.76 dry gallons / 10.22 to 12.16 dry liters in volume
Plants 3 - 5 Years Old
Size Volume
#5 Container Ranges from 2.92 to 4.62 dry gallons / 12.86 to 20.35 dry liters in volume
#6 Container Ranges from 5.25 to 6.01 dry gallons / 23.12 to 26.42 dry liters in volume
#7 Container Ranges from 5.98 to 6.08 dry gallons / 26.34 to 26.78 dry liters in volume

About Plant Sentry™

Plant Sentry is designed to protect both consumers and the nursery trade from invasive plant pests and diseases. Sites that display the Plant Sentry protection badge are protected from consumers buying and nurseries shipping material carrying invasive pests and diseases.

This proprietary eCommerce software prevents the shipment of a restricted plant to each state. The Plant Sentry system includes a shipment certification program. The Plant Sentry Compliance Officer works closely with and each nursery or fulfillment center to ensure only compliant plants are sold to customers.

Click Here to learn more

Plant Sentry


To obtain a more accurate shipment time-frame, simply enter your zip code in the “Find Your Growing Zone” box to the right. Our plants are grown all over the country and lead time on items may be different because of this. Once your order is placed, you will also receive the specific shipment time-frame information as part of your order confirmation. Once an item ships, you will receive shipment notification and tracking numbers, so you can follow along while your plant travels to your doorstep. We use FedEx, UPS, or USPS at our discretion.

Due to winter weather we have put a hold on shipping to the areas shown below in grey. You can still order now and we will ship the plant to you during an appropriate time for your zone.

*If you have found your zone already, it will be highlighted in the table below.
Color Zone Times
3 Spring 2019
4 Now
5 Now
6 Now
7 Now
8 Now
9 Now
10 Now
11 Now

Shipping Rates

At Nature Hills we handle, package and ship the products you order with the utmost care to ensure healthy delivery. Shipping and handling charges are calculated based on the tables below. Please note that some items include an additional handling surcharge, these will be noted on the item's product page.

From To S&H
0 - 19.99 24.99
20 - 49.99 29.99
50 - 69.99 34.99
70 - 99.99 39.99
100 - 129.99 44.99
130 - 149.99 48.99
150 - 150+ Approx 28%

Click here to see our full rates


Blue Boa Anise Hyssop Is Suited to Grow in Zones 5-9
Growing Zones 5-9
More Information
Brand Nature Hills' Choice
Botanical Name Agastache x 'Blue Boa'
Type Perennial
Mature Height 2 - 3 feet
Mature Spread 14 - 18 inches
Sun Exposure Full Sun
Soil Well Drained
Moisture Moderate to Low Once Established
Growth Rate Fast
Foliage Color Gray-Green
Pollinator Friendly Yes
Pruning Time Late Autumn
Fragrant Yes