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. Orange Agastache aurantiaca Apricot Sprite, photo courtesy of Walter's Garden

    Agastache aurantiaca 'Apricot Sprite' (Apricot Sprite Hyssop) provides a sizzling blast of bright orange flowers during the heat mid-to-late summer. An outstanding perennial for attr...

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    Agastache aurantiaca Apricot Sprite Apricot Sprite Hummingbird Mint (Hyssop) Agastache aurantiaca Apricot Sprite
    As low as $106.91 Sale $85.52
    Per Plant - 5" Deep Pot
    Agastache aurantiaca 'Apricot Sprite' (Apricot Sprite Hyssop) provides a sizzling blast of bright orange flowers during the heat mid-to-late summer. An outstanding perennial for attracting hummingbirds with brilliant fragrance. A great container plant; grow it as an annual if it is outside your growing zone.
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  2. Pink 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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    Agastache Ava Ava's Hummingbird Mint (Hyssop) Agastache Ava
    As low as $11.99 Sale $9.59
    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.
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Ornamental grasses

Cacti and Succulents

Shrubs and Small Trees

Text and select photos By David Salman

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