by High Country Gardens

Heat-Loving Perennials For Planting In Early Summer

Agastache Glowing Embers
Agastache thrive in warm weather. Agastache Glowing Embers, is a hummingbird magnet!

Different groups of plants grow best at different times of the year.

In my general observations, I have noted that:

  • Perennials from cold climates (zones 3-4) prefer to grow most actively when temperatures are cool. Oriental poppies are a prime example. They begin growing in early spring as soon as the soil thaws. After flowering in late spring, they will go dormant in the heat of summer. Then they sprout new leaves in the cool of fall to begin the cycle once more.
  • Perennials from hot summer regions, such as the Great Plains and the Southwestern United States, wait for the warmth of late spring before they begin growing. Leary of frost, these plants wait for the nights to begin to warm and the days heat up before their season starts. Flowering occurs during the heat of summer and early fall.
Salvia Amistad Salvia Amistad

It's these perennials and warm season ornamental grasses are excellent choices for planting in June. They grow well when the summer heat is on. To ensure success, follow these suggestions:

  • Be sure to water summer transplants regularly. And soak the soil long enough to push the water deep where the roots will follow.
  • Mulch where appropriate. In the Intermountain, California, PNW, Great Plains and Mid-Western states, summer mulching is an effective technique for keeping the soil moister and cooler for roots to grow their best. In hot, very humid, wetter climates, mulching may not be beneficial because of the potential for crown and root diseases.

Plants That Thrive With Warm Weather Planting

Here is a list of Plants for June Transplanting:

Flowering Perennials

  1. FlowerKisser™ Arizona Snow Agastache, Agastache urticifolia Arizona Snow

    FlowerKisser® Arizona Snow Agastache (Agastache urticifolia 'Alba') is a pure white flowered form of mountain hyssop, selected for its exceptional cold hardiness and nectar-rich flo...

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    FlowerKisser™ Arizona Snow Agastache FlowerKisser™ Arizona Snow Hummingbird Mint (Hyssop) Agastache urticifolia Arizona Snow
    Sale Price I Save 5%
    $12.99 Sale $12.34
    Per Plant - 5" Deep Pot
    FlowerKisser® Arizona Snow Agastache (Agastache urticifolia 'Alba') is a pure white flowered form of mountain hyssop, selected for its exceptional cold hardiness and nectar-rich flowers. Stunning flowers and fragrant foliage make this a must-have addition to attract native bees and butterflies. Its very upright growth habit make it a wonderful choice for the perennial border. Deer and rabbit resistant. A 2020 High Country Gardens Introduction.
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  2. 'Korean Zest' Agastache compact spikes of blue-violet flowers, Agastache rugosa

    ‘Korean Zest’ Agastache (Agastache rugosa), with its refreshing mint scented flowers and foliage, blooms all season and attracts an amazing number of bees and butterflies to its ...

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    Korean Zest Agastache Korean Zest Hummingbird Mint Agastache rugosa Korean Zest
    Sale Price I Save 5%
    $12.99 Sale $12.34
    Per Plant - 5" Deep Pot
    ‘Korean Zest’ Agastache (Agastache rugosa), with its refreshing mint scented flowers and foliage, blooms all season and attracts an amazing number of bees and butterflies to its compact spikes of blue-violet flowers. Long-lasting blooms from late spring to early fall make ‘Korean Zest’ a "must have" perennial in the pollinator garden. Aromatic foliage makes Agastache deer and rabbit resistant. Also known as Hummingbird Mint or Hyssop.
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  3. Pink and Orange and Silver Agastache rupestris, Agastache rupestris, Licorice Mint or Sunset Hyssop

    Agastache rupestris (Licorice Mint Hyssop) is one of the best, most durable species in the Agastache family. With smoky orange flowers held by lavender calyxes, the entire plant is s...

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    Agastache rupestris Licorice Hummingbird Mint (Sunset Hyssop) Agastache rupestris
    As low as $11.99 Sale $10.79
    Per Plant - 5" Deep Pot
    Agastache rupestris (Licorice Mint Hyssop) is one of the best, most durable species in the Agastache family. With smoky orange flowers held by lavender calyxes, the entire plant is scented like licorice and mint. A 1996 High Country Gardens introduction. Drought resistant/drought tolerant perennial plant (xeric).
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  4. Agastache rupestris Glowing Embers, Glowing Embers Licorice Mint Hyssop

    Agastache Glowing Embers is a fantastic selection of Licorice Mint Hyssop (Hummingbird Mint) with fragrant foliage and glowing orange-red tubular flowers that are a favorite with hum...

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    Glowing Embers® Agastache Glowing Embers® Licorice Hummingbird Mint (Hyssop) Agastache rupestris Glowing Embers®
    As low as $10.49 Sale $9.97
    Per Plant - 5" Deep Pot
    Agastache Glowing Embers is a fantastic selection of Licorice Mint Hyssop (Hummingbird Mint) with fragrant foliage and glowing orange-red tubular flowers that are a favorite with hummingbirds. Plant in containers to enjoy this plant in the eastern U.S. Exclusive. 24-26" tall x 24-28" wide.
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Ornamental grasses

Cacti and Succulents

Shrubs and Small Trees

Text and select photos By David Salman

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