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 15%
    $12.99 Sale $11.04
    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. Agastache Blue Blazes

    Blue Blazes is a large growing hybrid hummingbird mint with lavender-purple flower spikes. Very long blooming, its flowers attract hummingbirds, butterflies, and bees making it an es...

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    Blue Blazes Agastache Blue Blazes Hummingbird Mint (Hyssop) Agastache Blue Blazes
    Sale Price I Save 10%
    $9.99 Sale $8.99
    Per Plant - 5" Deep Pot
    Blue Blazes is a large growing hybrid hummingbird mint with lavender-purple flower spikes. Very long blooming, its flowers attract hummingbirds, butterflies, and bees making it an essential perennial for pollinators.
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  3. Red and Orange Agastache Coronado Red, Agastache Coronado Red, Coronado Red Hummingbird Mint

    Coronado Red® Hyssop (Agastache Pstessene Coronado® Red) is a distinctive selection of Hummingbird Mint with silver-green foliage and spikes of orange-red flowers. This Agastache p...

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    Coronado® Red Agastache Coronado® Red Hummingbird Mint (Hyssop) Agastache aurantiaca Pstessene
    As low as $10.99 Sale $10.44
    Per Plant - 5" Deep Pot
    Coronado Red® Hyssop (Agastache Pstessene Coronado® Red) is a distinctive selection of Hummingbird Mint with silver-green foliage and spikes of orange-red flowers. This Agastache plant has a very vertical habit and blooms beginning in mid-summer. A 2009 Plant Select winner. Drought resistant perennial plant (xeric).
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  4. Pink and Orange Agastache Desert Solstice, Agastache Desert Solstice, Desert Solstice Hummingbird Mint

    The flower spikes of Agastache Desert Solstice (Desert Solstice Hummingbird Mint) are remarkable for their fullness, large size, and exotic colorization. The plant is like a semi-dwa...

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    Desert Solstice Agastache Desert Solstice Hummingbird Mint (Hyssop) Agastache Desert Solstice
    As low as $11.99
    Per Plant - 5" Deep Pot
    The flower spikes of Agastache Desert Solstice (Desert Solstice Hummingbird Mint) are remarkable for their fullness, large size, and exotic colorization. The plant is like a semi-dwarf form of our best selling 'Desert Sunrise' but with more flowers. A High Country Gardens introduction.
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Ornamental grasses

Cacti and Succulents

Shrubs and Small Trees

Text and select photos By David Salman

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