Typically, Tea rose, Tea Hybrid, Noisette, Bourbon, China rose, Musk Damask Hybrid, or roses from breeders such as Nabonnand, Pemberton or Ducher have proven to behave very well in the warmest climates where they are always appreciated.
Along with other plants, most roses are not especially happy during the extreme heat of mid- to late summer. (Come to think of it, neither are most gardeners.)
Courtesy Nancy Butterfield Roses are sun-loving plants but they will struggle with excessive heat and drought. The majority of rose varieties do need bright sunny conditions. Many of them require at least 4 hours of direct sun a day, and flower best with a full 6 to 8 hours.
Those types include China roses, Rugosas, and Knock Out roses, all of which have received the designation as Earth-Kind Roses. One of the most drought tolerant varieties is the China rose, also know as the butterfly rose (Rosa chinensis 'Mutabilis').
Most roses prefer warm climates but many are extremely adaptable and can handle extreme temperatures when cared for correctly.
Protecting Roses from Hot Weather. When the temps are in the mid to high 90s to 100s (32-37 C.) and up, it is important to try and keep them not only well hydrated/watered but also to provide them some form of heat relief.
Roses can take the heat; it's intense sunlight that stresses them most. In the Southwest many roses do best with some afternoon shade in summer, but hosing down your plants at least two to three times a week is the next best thing, according to master gardener Vicky Donalson.
Miniature Rose
There's no beating around the (rose) bush on this one: miniature roses are high maintenance. Despite being some of the hardest flowers to grow and maintain, their adorable looks are just as special as a roses delivery!
Little Mischief. Don't let its name deceive you; 'Little Mischief' rose is one of the easiest roses to grow and a perfect resident for any sunny garden. It produces masses of magenta-pink flowers (that fade to lighter pink as they age) all season long. And this variety resists disease well.
White Roses -Gardeners who favor white roses are in for a real treat because some of the hardiest varieties are white. Giant flowers are cut from hybrid John F Kennedy, Pop John Paul, and Sugar Moon.
Contrary to popular belief, February and March are excellent times to start planting roses. Many landscapers will wait until April and May to begin planting roses because this is when the plants are already in bloom, and many nurseries will get their stock of roses in around January and February.
In extremely hot summer months, water every three to four days. If your rose garden is exposed to very windy conditions, the rose and the soil can dry out easily. Daily watering may be warranted. Adding a 2-3 inch layer of mulch can cool the soil down, and help to retain moisture in the soil.
Give your roses 1 to 2 inches of water each week in a single watering session from early spring through fall. Increase the frequency to every three or four days in hot and dry weather. Porous soils will also benefit from additional deep soakings.
March to May: Water newly planted roses every three days, and older, established roses every week. If it gets super hot and you go a long time without rain, you should water them a little extra. June to September: Newly planted roses should get a drink every two days, and established roses should be watered every week.
Rose plant is wilting may be due to excessive heat, which can stress any plant. The plant is using a tremendous amount of food and water in extreme heat and the foliage just can't keep up. Make sure your rose bush is getting adequate water without over watering, the roots don't like consistently wet soil.
The Knock Out® Family of Roses are the most disease resistant roses on the market making them easy to grow. All of the Knock Out® Roses are self-cleaning so there is no need to deadhead.
The longest-lasting rose variety from their study was Poison, a lovely dark pink variety, followed by Reward and Valentino roses. These three lasted several days longer than other varieties on average.
Feed them flower food or sugar
It provides all the nutrients your roses need to keep them looking lush. Place the food in the warm water in the vase and stir well before adding the roses. If they didn't come with flower food, try dissolving a teaspoon of sugar in a litre of water instead.
Low-maintenance Grace N' Grit™ Pink Shrub Roses bloom all summer long with little care. Most roses start the summer strong with lots of colorful flowers and lush, leafy growth. The right summer care can keep your roses healthy and flowering through the heat of summer and into autumn.
Monrovia's Nitty Gritty roses, another easy-care, versatile variety, require little maintenance for their continual blooms. The roses feature pink, yellow, red, and white flowers and bloom from early summer through autumn. They do not require deadheading to produce continuous flowers.
Most florists agree that flowers should last a good 7-10 days from purchase, depending on the individual variety. In extreme heat this reduces slightly but with a little extra care you should be able to enjoy them for at least a week.
Most roses can withstand a quick cold snap of temperatures down to 10 degrees F, but it is best to protect them if you expect an extended period of time when temperatures dip under 20 degrees F. The amount of protection your roses need depends on the climate in which you live.
Varieties for Desert Climates
The easiest to grow in arid climates is the Lady Banks Rose. This is also called the Tombstone rose as it is a very old specimen growing in Tombstone, Arizona. This particular rose is also recorded as the world's largest rose bush!