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Agastache, Anise-Hyssop, Hummingbird Mint 'Heatwave'


Family: Lamiaceae (lay-mee-AY-see-ee) (Info)
Genus: Agastache (ah-gas-TAH-kee) (Info)
Cultivar: Heatwave
Additional cultivar information:(PP19662)
Hybridized by Hop
Registered or introduced: 2007




Foliage Color:

Unknown - Tell us

Bloom Characteristics:

Flowers are good for cutting

This plant is attractive to bees, butterflies and/or birds

Water Requirements:

Drought-tolerant; suitable for xeriscaping

Average Water Needs; Water regularly; do not overwater

Where to Grow:

Grow outdoors year-round

Suitable for growing in containers


24-36 in. (60-90 cm)


18-24 in. (45-60 cm)


USDA Zone 5a: to -28.8 C (-20 F)

USDA Zone 5b: to -26.1 C (-15 F)

USDA Zone 6a: to -23.3 C (-10 F)

USDA Zone 6b: to -20.5 C (-5 F)

USDA Zone 7a: to -17.7 C (0 F)

USDA Zone 7b: to -14.9 C (5 F)

USDA Zone 8a: to -12.2 C (10 F)

USDA Zone 8b: to -9.4 C (15 F)

USDA Zone 9a: to -6.6 C (20 F)

USDA Zone 9b: to -3.8 C (25 F)

USDA Zone 10a: to -1.1 C (30 F)

USDA Zone 10b: to 1.7 C (35 F)

Sun Exposure:

Full Sun



Bloom Color:



Bloom Time:

Late Spring/Early Summer

Mid Summer

Late Summer/Early Fall

Mid Fall

Late Fall/Early Winter

Blooms repeatedly




Other details:

Unknown - Tell us

Soil pH requirements:

6.1 to 6.5 (mildly acidic)

6.6 to 7.5 (neutral)

7.6 to 7.8 (mildly alkaline)

Patent Information:


Propagation Methods:

Unknown - Tell us

Seed Collecting:

N/A: plant does not set seed, flowers are sterile, or plants will not come true from seed


This plant has been said to grow in the following regions:

Washington, District Of Columbia

Lawrenceville, Georgia

Hebron, Kentucky

Union, Kentucky

South China, Maine

Norton, Massachusetts

Nineveh, New York

Concord, North Carolina

Durham, North Carolina

show all

Gardeners' Notes:


On Jun 5, 2017, Adrienneny from Staten Island, NY (Zone 6b) wrote:

My plant from SunlightGardens was planted in a sunny in mostly hard clay soil. It wilted terribly without additional wate. I must have transplanted it four times in summer but it survived it all. It's the only agastache that returned from winter besides rupestris. I only wish it flowered more but maybe this year it will.


On Sep 9, 2012, annucia from Durham, NC wrote:

I planted a group of three Agastache heatwave last fall in Durham NC. They exploded in bloom this past June and have been blooming ever since. It is now Sept. I never deadheaded them although probably should have in August, maybe would have gotten additional blooms. They are in a hard to get at location and since even the spent blooms look pretty to me, I just left them be. The garden soil had been amended so has very good drainage, and needs very little water, held up beautifully during our 95 degree days. The deer stay away. I will plant more as soon as I can find it!


On Nov 26, 2010, themikeman from Concord, NC (Zone 7a) wrote:

Very Very Neat Plant!!, I bought mine at Lowes in 2008 and it is now about 4 ft tall and yet only 2 years old! The moths and Butterflies love this, but i've only seen a hummingbird on it once or twice as the seem to flock to my feeder i think instead. you only need one of these in a garden trust me, unless your garden is more then a couple hundred feet across having more than one or two of these would really crowd all the other perrenials out and detrack from the overall gardens beauty, so if you have to buy two, then plant at other opposite ends of the garden, no where close to each other..Looks really cool along with and in contrast to: Russian Sage. Purple Phlox such as 'Laura' and Blue Salvias. try not to put very many other pinks or lavenders with it though, darker perrenials look th... read more


On Aug 16, 2010, ngam from Southeast, MA (Zone 6b) wrote:

Second year in my garden and it is nearly five feet tall. Even with an up and down season weather wise as far as up and down temps and all or nothing for rain, this plant is making the humming birds and the gardener happy. Been blooming for well over a month and still going strong.


On Nov 27, 2009, gmary from Union, KY wrote:

This perennial was newely planted in my garden last year. It was between 3-4 feet tall. It was huge and it bloomed like crazy in full sun. Bees absolutely love this plant. Give this one plenty of room. I will be cutting mine back this year to keep it shorter in my small garden.