The Planting Season Continues - Plants That Like It Hot!
by High Country Gardens
Heat-Loving Perennials For Planting In Early Summer
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.
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.
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).
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.
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.
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.