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. Poquito™ Lavender Agastache, Garden Image

    Agastache hybrid ‚Poquito™ Lavender‚ PP#30,530 (Dwarf Hummingbird Mint) is prized for its compact bushy growth, long season of bloom, large flowers, and tolerance to he...

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    Poquito™ Lavender Agastache Poquito™ Lavender Hummingbird Mint Agastache 'TNAGAPL' PP#30,530
    $12.99
    Per Plant - 5" Deep Pot
    Agastache hybrid 'Poquito™ Lavender' PP#30,530 (Dwarf Hummingbird Mint) is prized for its compact bushy growth, long season of bloom, large flowers, and tolerance to heat and drought. Densely packed, bright lavender-pink flower spikes bloom from summer to mid-fall, attracting hummingbirds and other pollinators. A true garden work horse, it provides color, cut flowers, and sweet minty fragrance. One of the most compact Agastache plants available, it is the perfect fit for small space gardens, containers, and sidewalk gardens – a whole new way to enjoy this favorite waterwise perennial.
  2. Poquito™ Butter Yellow Agastache, Hummingbird Mint

    Agastache hybrid ‚Poquito™ Butter Yellow‚ PP#30,403 (Hummingbird Mint) is an award-winning dwarf Hummingbird Mint prized for its compact bushy growth, long season of bl...

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    Poquito™ Butter Yellow Agastache Poquito™ Butter Yellow Hummingbird Mint Agastache 'TNAGAPBY' PP#30,403
    $12.99
    Per Plant - 5" Deep Pot
    Agastache hybrid 'Poquito™ Butter Yellow' PP#30,403 (Hummingbird Mint) is an award-winning dwarf Hummingbird Mint prized for its compact bushy growth, long season of bloom, large flowers, and tolerance to heat and drought. Like golden sparklers, it brightens the garden all season long with sunny yellow flowers. One of the most compact Agastache plants available, it is the perfect fit for small space gardens, containers, and sidewalk gardens. Enjoy the hummingbirds and other pollinators as they flock to the densely packed flowers.
  3. Kudos™ Silver Blue Agastache, Hummingbird Mint

    Agastache hybrid ‚Kudos™ Silver Blue‚ PP#25,344 (Dwarf Hummingbird Mint) blooms non-stop from late spring to fall with blue blooms. Fragrant foliage and a compact form ...

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    Kudos™ Silver Blue Agastache Kudos™ Silver Blue Hummingbird Mint (Hyssop) Agastache Kudos™ 'Silver Blue' PP#25,344
    $12.99
    Per Plant - 5" Deep Pot
    Agastache hybrid 'Kudos™ Silver Blue' PP#25,344 (Dwarf Hummingbird Mint) blooms non-stop from late spring to fall with blue blooms. Fragrant foliage and a compact form are perfect for a sidewalk garden, containers, or small gardens.
  4. Ava's Hummingbird Mint (Hyssop), Agastache Ava

    Agastache Ava is one of High Country Gardens very best plant introductions, renowned for its tall spikes of deep rose-pink flowers held by raspberry-red calyxes. This vigorous hybrid...

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    Ava Agastache Ava's Hummingbird Mint (Hyssop) Agastache Ava
    As low as $14.99 Sale $14.24
    Per Plant - 5" Deep Pot
    Agastache Ava is one of High Country Gardens very best plant introductions, renowned for its tall spikes of deep rose-pink flowers held by raspberry-red calyxes. This vigorous hybrid Hummingbird Mint blooms for many months beginning in mid-summer. 2005 Plant of the Year.

Ornamental grasses

Cacti and Succulents

Shrubs and Small Trees

Text and select photos By David Salman

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