Summerlong Magenta Mexican Giant Hyssop (Agastache mexicana 'Balsumlmag' SUMMERLONG MAGENTA)
ag-ah-STAK-ee meks-ih-KAH-nah 'Balsumlmag' SUMMERLONG MAGENTA

Deciduous Perennial (usually grown as an annual near you) Clumping, erect in the Lamiaceae Family
 
Buy Summerlong Magenta Mexican Giant Hyssop
Size Notes Price Availability
Tray of 6 #1 gallons Field

Blooming. Proven Winner| Tender (9/13)

$69.75 Likely available
11/1 - 11/8
1/24 - 4/4

Agastache mexicana 'Balsumlmag' SUMMERLONG MAGENTA is a compact Mexican giant hyssop with a long, early-starting bloom of magenta-purple spikes atop fragrant green foliage. Pollinators love it, but it's tender outside Zone 7a.
Summerlong Magenta is part of Ball Horticultural/Darwin Perennials' Summerlong series of Mexican giant hyssop, alongside Summerlong Coral and Summerlong Lemon. It forms a compact, clumping mound of aromatic green foliage topped by dense magenta-purple flower spikes that open earlier in the season and hold their color longer than typical Agastache mexicana selections. The blooms are rich in nectar and consistently draw hummingbirds, bees, and butterflies. Best in full sun with well-drained soil kept on the dry side; like its siblings, it is only reliably winter-hardy to Zone 7a and should be treated as an annual in colder climates such as Chicago.

Pros

  • Long, early-starting bloom of vivid magenta-purple flower spikes
  • Fragrant, deer- and rabbit-resistant foliage
  • Strong magnet for hummingbirds, bees, and butterflies
  • Compact, well-behaved mounded habit good for containers and borders

Cons

  • Only hardy to Zone 7a; will not survive Chicago winters in-ground
  • Needs sharp drainage, especially over winter
  • Not yet patented (PPAF/license status) as of this audit
This plant is probably not winter-hardy outdoors where you live.
 

Plant Data

Mature Size 16 - 22 inches tall. 16 - 22 inches wide.
Growth Rate Medium
Sun Exposure Full Sun - Full Sun
Moisture Tolerance Dry - Medium
Zones 7a - 10b (Usually hardy to 0° F)
Tags Annual in Chicago, Attracts Bees, Attracts Beneficial Insects, Attracts Butterflies, Attracts Hummingbirds, Attracts Pollinators, Container, Deciduous, Deer Resistant, Drought Tolerant, Dry, Fragrant, Fragrant Foliage, Full Sun, Good for Borders, Good for Mass Planting, Grown as Annuals, Medium, Mounded, Perennial, Rabbit Resistant, Tender Perennial, Well-Drained Soil
Bloom Period Late Spring to Late Summer
Flower Color Magenta
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Pricing and Availability History

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Past Availability
2024 : 06/12 - 07/20

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Field-Grown vs. Greenhouse-Grown Plants

Plants which are well-adapted to our local climate are most often field-grown (outside). Field-grown plants are generally cheaper and have the advantage of already somewhat acclimated to our cold winters, but that means they’re not artificially far along in the spring and tend to bloom at the normal time in our area.

Spring annuals and tender perennials are typically grown in Greenhouses so they can be ready and luxurious exactly when customers want them. Some perennials are also “forced” into early bloom in greenhouses. In May, there can be a very big difference between field-grown and greenhouse-grown plants of the same type. The latter typically look good right away (so they’re a great choice where that’s important), but we typically pay a premium for it.


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No Pricing or Availability Right Now

We order from a rotating cast of the best nurseries in the Great Lakes region. It looks like we've offered this plant in the past, but the nurseries we're working with this week don't appear to have it in stock at the moment.

Our goal is to bring as many plants together under "one roof" as possible, so we'll try hard to make it available again in the future!