Light Needs
Mature Height
Mature Spread
Growing Zones
Robust minty-scented foliage along sturdy stems offset an explosion of lavender-purple plumes that appear in late April. Whispurr™ Blue Catmint, Nepeta x faassenii Whispurr™️, is a vigorous long-season bloomer, putting on a colorful show from late spring through early September.
Whispurr™ Blue Catmint is quite frost tolerant and hardy in Zones 4-9. It maintains a compact form and grows up to 28 inches tall with a spread of 22 inches. The densely packed foliage has a lovely mint fragrance. This is a much-loved magnet for butterflies and other pollinating insects. Its mounding habit and long blooming season make a vibrant colorful impression when planted en masse along paths and walkways.
Whispurr™ Blue Catmint Care
Find an area in your garden where Whispurr™ Blue Catmint will receive full to partial sun, at least 5-8 hours per day. Whispurr™ Blue Catmint will benefit from being planted in a location that has afternoon shade in very hot regions. It thrives in average, well-drained soils. Water regularly and deeply during the first growing season to get the plant off to a great start. Once Whispurr™ Blue Catmint is mature, reduce watering frequency, and allow the soil to dry slightly before watering again.
Whispurr™ Blue can easily be grown in containers; be sure the container has ample drainage holes and well-draining potting soil. Whispurr™ Blue Catmint needs little care other than removing spent flowers to promote extended blooming throughout the season. Propagation can be done by division every few years or spreading the dried seeds around the base of your plant to encourage wider spread in the following years. Whispurr™ Blue Catmint is cold hardy down to Zone 4; in colder regions apply a few inches of natural mulch around the root area for added protection.
Whispurr™ Blue Catmint Spacing
Whispurr™ Blue Catmint is a wonderful addition to pollinator gardens and perennial beds, works very well as an edging along walkways, and can easily be grown in containers. To avoid crowding, space Whispurr™ Blue Catmint 22-24 inches apart on center from other plants to account for its mature spread.
Whispurr™ Blue Catmint Information
| USDA Hardiness Zones: 4 - 9 |
| Plant Type: Perennial |
| Light Exposure: Partial Sun to Full Sun (At Least 5 Hours of Direct Sunlight) |
| Mature Height: 24 - 28 Inches |
| Mature Spread: 18 - 22 Inches |
| Spacing: 22 - 24 Inches |
| Habit: Mounded |
| Flower Color(s): Blue, Purple, White |
| Flower Description: Blueish Purple Flowers With White Tips Scattered Throughout |
| Bloom Period: |
| Foliage Type: Herbaceous |
| Foliage Color(s): Green |
| Foliage Description: |
| Seasonal Interest: Spring Flowering, Summer Flowering |
| Watering: Low |
| Resists: Deer, Rabbit |
| Tolerates: Drought, Salt |
| Attracts: Bees, Butterflies |
| Container Role: Thriller |
| Uses: Borders, Containers, Mass Planting |
| Features: Attracts Pollinators, Cut Flowers, Fragrant |
| Brand: Plants That Work |
| Common Name: Whisper Blue Catmint |
| Other Name(s): Cat Mint |
| Scientific Name: Nepeta x faassenii Whispurr™ Blue |
Please Note: The pictures below are to give a general representation of the different container sizes. The actual size/ages of plants are estimates and will vary based on type of plant, time of year, last pruning & many other factors.
Also Known As:
Quart
Plant Age:
~ 6 months - 1 year
Plant Size:
~ 4"-8"
Pot Size:
~ 4.75"H x 4.5"W
Volume:
1.50 quarts
Also Known As:
2.5 Quart Pot
Plant Age:
~ 1 - 2 years old
Plant Size:
~ 8"-12"
Pot Size:
~ 6.5"H x 6.5"W
Volume:
2.20-2.30 quarts
Also Known As:
#1 Container
1 Gallon
Plant Age:
~ 1 - 2 years old
Plant Size:
~ 10"-14"
Pot Size:
~ 7"H x 7.75"W
Volume:
2.26-3.73 quarts
Also Known As:
#2 Container
2 Gallon
Plant Age:
~ 1.5 - 3 years old
Plant Size:
~ 12"-18"
Pot Size:
~ 9.5"H x 9.5"W
Volume:
1.19-1.76 gallons
Also Known As:
#3 Container
3 Gallon
Plant Age:
~ 2 - 4 years old
Plant Size:
~ 12"-30"
Pot Size:
~9.5"H x 11"W
Volume:
2.32-2.76 gallons
Also Known As:
#5 Container
5 Gallon
Plant Age:
~3-4 years old
Plant Size:
~ 20" - 60"
Pot Size:
~11" H x 10 1/2” W
Volume:
3.5 - 4 gallons
We stand behind our plants with industry-leading guarantees to give you peace of mind.
We want your plants to arrive in great condition! If you notice any issues upon delivery, contact us within 3 days.
Starting January 1, 2025 all bushes, perennials & trees purchased come with an extended 1-year warranty for added confidence. If your plant dies due to a health issue within a year, we’ll make it right.
Pre-ordered plants are scheduled to ship in Spring 2025. We carefully plan our shipping dates based on your USDA Plant Hardiness Zone to ensure optimal planting conditions upon arrival. Want it sooner/later? Reach out, and we'll try our best to accommodate.
Estimated ship week for pre-ordered plants will ship based on growing zones as shown below.
| Growing Zone | Estimated Ship Week |
|---|---|
| Zone 10 | March 31th |
| Zone 9 | March 31st |
| Zone 8 | April 7th |
| Zone 7 | April 14th |
| Zone 6b | April 21st |
| Zone 6a | April 28th |
| Zone 5b | May 5th |
| Zone 5a | May 12th |
| Zone 4 | May 19th |
| Zone 3 | May 26th |
Note: These are only estimated ship dates. Plants may ship out later depending on weather & growing conditions of the plant.
Note: Only plants indicated as pre-order will ship as shown above. All other plants and hard goods will ship as normal.
Plants that are currently in stock typically ship within 2-7 business days after your order is placed.
Plant Addicts ships to the lower 48 states within the U.S. Unfortunately, we do not currently ship to Alaska, Hawaii, or internationally.
This plant cannot be shipped to the following states: Idaho, AK, HI. These restrictions apply only to this specific plant due to agricultural regulations or other limitations. Other plants may still be available for shipping to these states.
If you have any questions about shipping restrictions, feel free to reach out to our team!