• Photo of Agastache 'Astello Indigo' (Agastache 'Astello Indigo's)

Plant Profile: Agastache 'Astello Indigo'

Names

Hummingbird Mint, Hyssop, Indigo Agastache

  • Photo of Agastache 'Astello Indigo' (Agastache 'Astello Indigo's)

Phonetic Spelling:ah-GAH-sta-kee

Genus:Agastache

Species:

Family:Lamiaceae

Astello Indigo is a hybrid variety of Agastache, belonging to the mint family. This plant features upright spikes adorned with aromatic, deep indigo-blue flowers that emit a minty fragrance, drawing in butterflies and bees. It grows robustly in a compact form and thrives in full to partial sunlight, preferring well-drained soil. Once established, it demonstrates resilience to drought and heat. However, like all Agastaches, it should not be planted in clay or poorly draining soils, as excessive winter moisture can be detrimental.

This versatile plant is suitable for container gardening, pollinator gardens, and mass plantings. In regions with colder climates, it can be cultivated as an annual. Astello Indigo offers an extended blooming season, enhancing your garden's appeal while attracting a variety of pollinators.

Note: Be cautious of crown rot, which can occur in overly wet soils.

For further details on Agastache, additional resources are available.

Agastache 'Astello Indigo' Feature Summary

Agastache 'Astello Indigo' Image Gallery

Tags

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#drought tolerant
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#fragrant leaves
#nectar plant
#blue flowers
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#fall interest
#rabbit resistant
#flower arrangements
#summer flowers
#deer resistant
#mint
#cutting garden
#indigo
#bird friendly
#butterfly friendly
#partial shade tolerant
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#container plants

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Agastache 'Astello Indigo' Feature Summary

Attributes
Flowers attract butterflies, hummingbirds, birds, and bees.
Perennial
Wildlife Food Source
Attracts Pollinators
Flowers
Indigo blue flowers have a minty fragrance from summer through fall. Produces many small tubular blooms on tall spikes. Blooms are blue surrounded by deep purple bracts.
Purple/Lavender
Blue
Fragrant
Good Cut
Long Bloom Season
Good Dried
2-3 rays/petals
Tubular
Lipped
< 1 inch
Leaves
Bright green leaves are slightly serrated and have a rootbeer fragrance.
Whole Plant Traits
Perennial
Herbaceous Perennial
Medium
Cultural Conditions
Full sun (6 or more hours of direct sunlight a day)
Partial Shade (Direct sunlight only part of the day, 2-6 hours)
Alkaline (>8.0)
Neutral (6.0-8.0)
Good Drainage
Occasionally Dry
12 inches-3 feet
Less than 12 inches
Coastal
Mountains
Piedmont
Loam (Silt)
Sand
Landscape
Cutting Garden
Drought Tolerant Garden
Butterfly Garden
Pollinator Garden
Border
Mass Planting
Drought
Deer
Rabbits
Container
Naturalized Area
Butterflies
Pollinators
Songbirds
Bees
Hummingbirds

Agastache 'Astello Indigo' Attributes

Agastache 'Astello Indigo': Wildlife Value

Flowers attract butterflies, hummingbirds, birds, and bees.

Agastache 'Astello Indigo': Life Cycle

Annual
Biennial
Bulb
Perennial
Woody

Agastache 'Astello Indigo': Recommended Propagation Strategy

Division
Grafting
Layering
Leaf Cutting
Root Cutting
Seed
Stem Cutting

Agastache 'Astello Indigo': Play Value

Attractive Flowers
Attracts Pollinators
Buffer
Colorful
Defines Paths
Easy to Grow
Edible fruit
Fragrance
Pieces Used in Games
Screening
Shade
Sound
Textural
Wildlife Cover/Habitat
Wildlife Food Source
Wildlife Larval Host
Wildlife Nesting
Wind Break
Wind Shimmer

Agastache 'Astello Indigo' Fruit

Agastache 'Astello Indigo': Fruit Description

Dry nutlet

Agastache 'Astello Indigo': Fruit Type

Achene
Aggregate
Berry
Capsule
Caryopsis
Drupe
Follicle
Legume
Nut
Pome
Samara
Schizocarp
Siliqua

Agastache 'Astello Indigo' Flowers

Agastache 'Astello Indigo': Flower Description

Indigo blue flowers have a minty fragrance from summer through fall. Produces many small tubular blooms on tall spikes. Blooms are blue surrounded by deep purple bracts.

Agastache 'Astello Indigo': Flower Color

filter_vintage
Blue
filter_vintage
Purple/Lavender

Agastache 'Astello Indigo': Flower Inflorescence

Catkin
Corymb
Cyme
Head
Insignificant
Panicle
Raceme
Solitary
Spadix
Spike
Umbel

Agastache 'Astello Indigo': Flower Value To Gardener

Edible
Fragrant
Good Cut
Good Dried
Long Bloom Season
Long-lasting
Showy

Agastache 'Astello Indigo': Flower Bloom Time

Winter
Spring
Summer
Fall

Agastache 'Astello Indigo': Flower Petals

2-3 rays/petals
4-5 petals/rays
6 petals/rays
7 - 20 petals/rays
asymmetrical petals
Bracts
Colored Sepals
fused petals
more than 20 petals/rays
Tepals

Agastache 'Astello Indigo': Flower Shape

Bell
Cross
Crown
Cup
Dome
Funnel
Irregular
Lipped
Radial
Saucer
Star
Trumpet
Tubular
Urn
Wheel

Agastache 'Astello Indigo': Flower Size

1-3 inches
3-6 inches
< 1 inch
> 6 inches

Agastache 'Astello Indigo' Leaves

Agastache 'Astello Indigo': Leaf Description

Bright green leaves are slightly serrated and have a rootbeer fragrance.

Agastache 'Astello Indigo': Woody Plant Leaf Characteristics

Broadleaf Evergreen
Deciduous
Needled Evergreen
Semi-evergreen

Agastache 'Astello Indigo': Leaf Color

spa
Green

Agastache 'Astello Indigo': Leaf Type

Compound (Pinnately , Bipinnately, Palmately)
Fronds
Needles
Sheath
Simple

Agastache 'Astello Indigo': Leaf Arrangement

Alternate
Opposite
Other/more complex
Rosulate
Whorled

Agastache 'Astello Indigo': Leaf Margin

Crenate
Crenulate
Dentate
Denticulate
Doubly Crenate
Doubly Dentate
Doubly Serrate
Entire
Lobed
Serrate
Sinuate
Undulate

Agastache 'Astello Indigo': Hairs Present

No
Yes

Agastache 'Astello Indigo': Leaf Value To Gardener

Edible
Fragrant
Good Cut
Good Dried
Long-lasting
Showy

Agastache 'Astello Indigo' Stem

Agastache 'Astello Indigo': Stem Description

Strong square green stems

Agastache 'Astello Indigo': Stem Color

grass
Green

Agastache 'Astello Indigo': Stem Is Aromatic

No
Yes

Agastache 'Astello Indigo': Stem Cross Section

Angular
Oval
Round
Square

Agastache 'Astello Indigo' Whole Plant Traits

Agastache 'Astello Indigo': Plant Type

Annual
Bulb
Carnivorous
Edible
Epiphyte
Fern
Ground Cover
Herb
Herbaceous Perennial
Houseplant
Mushroom
Native Plant
Ornamental Grasses and Sedges
Perennial
Poisonous
Rose
Shrub
Succulent
Tree
Turfgrass
Vegetable
Vine
Water Plant
Weed
Wildflower

Agastache 'Astello Indigo': Woody Plant Leaf Characteristics

Broadleaf Evergreen
Deciduous
Needled Evergreen
Semi-evergreen

Agastache 'Astello Indigo': Habit/Form

Arching
Ascending
Broad
Cascading
Climbing
Clumping
Columnar
Conical
Creeping
Dense
Erect
Horizontal
Irregular
Mounding
Multi-stemmed
Multi-trunked
Open
Oval
Prostrate
Pyramidal
Rounded
Spreading
Vase
Weeping

Agastache 'Astello Indigo': Growth Rate

Slow
Medium
Rapid

Agastache 'Astello Indigo': Maintenance

Low
Medium
High

Agastache 'Astello Indigo': Texture

Fine
Medium
Coarse

Agastache 'Astello Indigo' Cultural Conditions

Agastache 'Astello Indigo': Light

Dappled Sunlight (Shade through upper canopy all day)
Deep shade (Less than 2 hours to no direct sunlight)
Full sun (6 or more hours of direct sunlight a day)
Partial Shade (Direct sunlight only part of the day, 2-6 hours)

Agastache 'Astello Indigo': Soil pH

Acid (<6.0)
Alkaline (>8.0)
Neutral (6.0-8.0)

Agastache 'Astello Indigo': Soil Drainage

Frequent Standing Water
Good Drainage
Moist
Occasional Flooding
Occasionally Dry
Occasionally Wet
Very Dry

Agastache 'Astello Indigo': Available Space To Plant

12 inches-3 feet
12-24 feet
24-60 feet
3 feet-6 feet
6-feet-12 feet
Less than 12 inches
more than 60 feet

Agastache 'Astello Indigo': NC Region

Coastal
Mountains
Piedmont

Agastache 'Astello Indigo': USDA Plant Hardiness Zone

thermostat
6a
thermostat
6b
thermostat
7a
thermostat
7b
thermostat
8a
thermostat
8b
thermostat
9a
thermostat
9b

Agastache 'Astello Indigo': Soil Texture

Clay
High Organic Matter
Loam (Silt)
Sand
Shallow Rocky

Agastache 'Astello Indigo' Landscape

Agastache 'Astello Indigo': Landscape Theme

Asian Garden
Butterfly Garden
Children's Garden
Cottage Garden
Cutting Garden
Drought Tolerant Garden
Edible Garden
English Garden
Fairy Garden
Garden for the Blind
Native Garden
Nighttime Garden
Pollinator Garden
Rain Garden
Rock Garden
Shade Garden
Water Garden
Winter Garden

Agastache 'Astello Indigo': Design Feature

Accent
Barrier
Border
Flowering Tree
Foundation Planting
Hedge
Mass Planting
Screen/Privacy
Security
Shade Tree
Small groups
Small Tree
Specimen
Street Tree
Understory Tree

Agastache 'Astello Indigo': Resistance To Challenges

Black Walnut
Compaction
Deer
Diseases
Drought
Dry Soil
Erosion
Fire
Foot Traffic
Heat
Heavy Shade
Humidity
Insect Pests
Pollution
Poor Soil
Rabbits
Salt
Slugs
Squirrels
Storm damage
Urban Conditions
Voles
Wet Soil
Wind

Agastache 'Astello Indigo': Landscape Location

Coastal
Container
Hanging Baskets
Houseplants
Lawn
Meadow
Naturalized Area
Near Septic
Patio
Pond
Pool/Hardscape
Recreational Play Area
Riparian
Rock Wall
Slope/Bank
Small Space
Vertical Spaces
Walkways
Woodland

Agastache 'Astello Indigo': Attracts

Bats
Bees
Butterflies
Frogs
Hummingbirds
Moths
Pollinators
Predatory Insects
Reptiles
Small Mammals
Songbirds
Specialized Bees