Agave, Chisos Agave, Harvard's Agave, Havard's Century Plant

Agave havardiana

Family: Agavaceae (ah-gav-AY-see-ee) (Info)
Genus: Agave (a-GAH-vee) (Info)
Species: havardiana (hav-ar-dee-AY-nuh) (Info)

Category:

Cactus and Succulents

Foliage Color:

Silver/Gray

Bloom Characteristics:

Unknown - Tell us

Water Requirements:

Drought-tolerant; suitable for xeriscaping

Where to Grow:

Unknown - Tell us

Height:

12-18 in. (30-45 cm)

18-24 in. (45-60 cm)

Spacing:

18-24 in. (45-60 cm)

Hardiness:

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

Danger:

Plant has spines or sharp edges; use extreme caution when handling

Bloom Color:

Bright Yellow

Bloom Time:

Late Spring/Early Summer

Mid Summer

Foliage:

Grown for foliage

Evergreen

Succulent

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:

Non-patented

Propagation Methods:

By dividing rhizomes, tubers, corms or bulbs (including offsets)

From seed; germinate in vitro in gelatin, agar or other medium

This plant is monocarpic

Seed Collecting:

Allow pods to dry on plant; break open to collect seeds

Regional

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

,

Huntington, Arkansas

Richmond, California

Boulder, Colorado

Denver, Colorado

Pueblo, Colorado

Harlem, Georgia

Chicago, Illinois

Albuquerque, New Mexico

Roswell, New Mexico

Elizabeth City, North Carolina

Rock Hill, South Carolina

Arlington, Texas

Copperas Cove, Texas

El Paso, Texas

Kermit, Texas

San Antonio, Texas

Reston, Virginia

show all

Gardeners' Notes:

2
positives
1
neutral
0
negatives
RatingContent
Neutral

On Mar 23, 2016, Lodewijkp from Zwolle,
Netherlands (Zone 7a) wrote:

Usually hardy to -10F or -5F when kept dry. Most reports from the UK inform that this plant will succumb to excessive winter moisture, it survives the winter but usually starts rotting at the end of the winter.

There are also a few reports from UK and europe where people claim that their havardiana survived winter without rain protection in high humidity ( of course provided good drainage ) which is quite uncommon , i think there are some subspecies or certain havardiana of a different provenance that is resistent against wet humid conditions.

Positive

On Apr 7, 2008, peachespickett from Huntington, AR wrote:

Out of all the different species I have planted outside in a sand-gravel raised desert bed, this agave has handled the Arkansas climate the best....Grows fast, even put out offsets during fall and winter (when it gets more than half-day shade), handles record amounts of rain over the last year with absolutely no issues.

Positive

On Feb 22, 2004, palmbob from Acton, CA (Zone 8b) wrote:

Very attractive ghostly agave with nearly white leaves, and prominent, black-brown lateral and terminal spines. This is also a slow suckerer, making it a useful and manageable landscape agave. Very striking in a setting with darker colored plants. Similar looking to Agave parryi varieties.

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