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. Kudos™ Silver Blue Agastache, Hummingbird Mint

    Agastache x ‚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 p...

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    Kudos™ Silver Blue Agastache Kudos™ Silver Blue Hummingbird Mint (Hyssop) Agastache Kudos™ 'Silver Blue' PP#25,344
    Sale Price I Save 15%
    $12.99 Sale $11.04
    Per Plant - 5" Deep Pot
    Agastache x '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.
  2. Agastache Collection (Hummingbird Mint Hyssop Collection)

    Our Agastache Collection is a showcase of four bestselling Agastache cultivars. Also known as Hummingbird Mint, these showy, fragrant, long-blooming perennials are essential for wate...

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    Agastache Collection Hummingbird Mint Collection (Hyssop) Agastache Collection
    $52.99
    Per Collection of 4
    Our Agastache Collection is a showcase of four bestselling Agastache cultivars. Also known as Hummingbird Mint, these showy, fragrant, long-blooming perennials are essential for waterwise pollinator gardens, and they’re a magnet for hummingbirds. Their airy, fragrant foliage will delight the senses, while deterring deer and rabbits. A showcase of garden superstars, this collection is perfect for beginning gardeners and Agastache enthusiasts alike. Collection of 4 plants.
  3. 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
    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.
  4. Agastache Kudos™ Mandarin, Hummingbird Mint, Photo courtesy of TERRA NOVA® Nurseries, Inc.

    Agastache hybrid ‚Kudos™ Mandarin‚ PP#25,381 (Hummingbird Mint) has showy, bright-orange flowers on short flower spikes which are highly attractive to hummingbirds. It...

    Learn More
    Kudos™ Mandarin Agastache Kudos™ Mandarin Hummingbird Mint (Hyssop) Agastache Kudos™ Mandarin PP#25,381
    As low as $14.99
    Per Plant - 5" Deep Pot
    Agastache hybrid 'Kudos™ Mandarin' PP#25,381 (Hummingbird Mint) has showy, bright-orange flowers on short flower spikes which are highly attractive to hummingbirds. Its compact size and bushy habit gives it a neat and tidy appearance, while it blooms from early summer through September.

Ornamental grasses

Cacti and Succulents

Shrubs and Small Trees

Text and select photos By David Salman

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