Share / Save
Helping You Become a More Successful Gardener

Perennial Herbs & Flowers That Take the Heat

Email Email Page Print Print Page
Mary Moore

Extras

If you can’t stand the heat, get out the garden! At least that’s how I feel about those perennial herbs and flowers that can’t make it through hot, dry summers. Tender selections are just too time-consuming with all the pampering they need to survive.

Yarrow
The pretty foliage and bright flowers of yarrow bring life to the hot summer garden.
Photo Credit: Mary Moore
Verbena
A very aggressive grower, Verbena will often burst into bloom right after a summer rain. ‘Homestead Purple’ is a hardy hybrid variety.
Photo Credit: Mary Moore
Daffodils and Veronica
‘Georgia Blue’ Veronica makes a beautiful blue background to springtime bulbs.
Photo Credit: Mary Moore
Lavender
‘Provence’ lavender is hardy, fragrant and attractive.
Photo Credit: Mary Moore
Artemesia
A gentle spreader in the shade, ‘Silver Mound’ artemisia provides a silver-gray background to shrubs and annuals.
Photo Credit: Mary Moore

If your garden gets hit with drought or extreme heat, don’t panic – you don’t have to let your favorite hobby dry up in the sun. Just try a few of these colorful, hardworking plants instead. Not only can these beauties survive hot, dry summers, they’ll return to thrive when temperatures are more moderate. They’re sure to become a welcome addition to your garden!

Yarrow: Achillea sp. is a group of self-seeding perennials with ferny foliage that can take full sun and grow beautifully year after year. A sun-loving flower, yarrow needs very well-drained soil and is prone to root rot when sunk into clay. Blooms can be cream, yellow, pink or deep red, and the plant’s medium green or gray-green leaves grow during the summer and die back in fall. When the flowers dry, just rub them and allow the flake-like seeds to fall over the ground to reseed for the next year. Cover seeds lightly with soil, water and wait for your plants to return!

Verbena: A fast-growing spreader, Verbena canadensis is a perennial that’s often treated as an annual in areas with hard winters. Once the flowers start to appear in late spring, it blooms profusely through fall. Drought may slow down flower production, but as soon as a good rain falls, the plant bursts back into color! Verbena blooms come in a range of hues, including white, pink, magenta, purple, blue and combinations of these. Plants can be propagated by seed or by cuttings. Some hybrid varieties, like ‘Homestead Purple’, are hardier, and will recover in spring after a mild winter. Plant verbena in partial to full sun, and give it plenty of room to grow – particularly if it’s a hardier variety. The plant will spread and root, then spread more!

Veronica: Commonly known as speedwell, Veronica sp. comes in a wide variety of shapes and habits. Some are groundcovers with small, plentiful blooms, while others reach 2 feet tall and have spikelike flowers. These beautiful blooms can be pink, blue or white, and some varieties can have assorted colors. Veronica can be planted in full sun, and most varieties need moderate water – although some, like V. prostrata, need less.

Lavender: Lavender is a lovely herb, and its flowers are used in perfumes, as well as food. There are several species of Lavandula to choose from. L. angustifolia (English lavender) is considered more fragrant and grows well in Mediterranean climates and the like. But in humid regions – specifically in the South, with its clay soil and wet winters – this species can be very challenging to grow. So consider L. x intermedia (lavandin). There are a wide variety of cultivars, including ‘Provence’ and ‘Grosso’. The plants reproduce more faithfully from cuttings than from seeds. As an added bonus, many lavandins are fragrant and not attractive to deer. Just plant in full sun, don’t overwater and enjoy!

Artemisia: Artemisia is a large group of shrubs, perennials and annuals with ornamental foliage generally of silver or glaucous gray. The leaves are aromatic, with many species being toxic (like common wormwood), while a few are edible (like French tarragon or the species distilled into absinthe). In areas of extreme heat, some varieties will thrive in full sun, but others prefer morning light and protection from late afternoon rays. Plant Artemisia in an area that won’t be overwatered. Several varieties, like ‘Silver Mound’, provide a lovely contrast to other colors in the garden.

No matter which selections you choose, all these plants will benefit from well-drained soil, compost and a balanced fertilizer (like a 10-10-10) mixed in. Under the right planting conditions, these beauties are sure to please throughout the hottest months of the year, giving you a gorgeous garden that won’t buckle under any heated pressure!

Tips
  • Contact your local garden center to find out when these plants will be available in your area.
Faqs
  • Q: When should I plant perennials?
    A: Many perennials can be planted in spring or fall. If you have a mild winter but a harsh summer, fall planting will allow your plant to develop a strong root system before facing any summer drought. If you have harsh winters and don’t think your perennials will survive the frost, they can be planted in spring. (In extreme cold, some of these plants may need to be treated as annuals.)
 
Page 1 of 1

Next Steps


Articles
  • Perennial Basics: Getting Started
    The right perennials in the right locations bring a yard fabulous color, texture and overall beauty. Think about the type of plant you’re looking for, then find the perfect perennial for you – and your garden.
  • Three Easy-Care Perennials
    New gardeners interested in planting perennials should give these three easy-care plants a try for seasonal interest.
  • Watering-In: A Key to Plant Success
    If you’re a novice gardener, you may be apprehensive about your watering ability. Learning the basics will eliminate some of the mystery – and even give you confidence.
RATE THIS PAGE
On average this item has been rated a 5 out of 5.