Don't stick your plants in the ground mere days before the first expected frost. Your roses won't have time to get settled in and become established before the harsh winter weather hits. The right time to plant is about six weeks before the first predicted frost date in the fall.
Additionally, roses planted in April and May are doomed to face the upcoming summer heat sooner than later. Roses planted in February and March are able to establish roots while the weather is mild and are able to deal with the heat better once it arrives.
Autumn is an excellent time to prepare rose beds even if planting is delayed until spring. Select a location with good drainage, away from tree roots, and where the sun shines at least four or five hours a day, preferably more.
Aside from times of extreme weather, roses can be planted at any time during the year. The extreme weather conditions that we advise against planting in are when the ground is frozen, water-logged or during a drought.
Bare root roses should be planted between November and March, while containerized roses can go into the ground at any time of year. If possible, opt to plant roses in bare root form in winter or early spring to give your new roses the best possible start.
WHEN TO PRUNE ROSES. The best time to prune roses is in late winter or early spring, around the time new growth begins. This could be as early as January or as late as May, depending on your climate.
A: In Southern California, it's never too late to plant rosebushes. The popular “Iceberg” roses are super hardy and will rebloom without constant deadheading. They are also available in pink and burgundy flowered varieties. If you want to plant any perennials, it's a good idea to do it sooner rather than later.
Meanwhile, summer planting is also not ideal because of the high heat during this season. In San Diego, for instance, the temperature in August can hit 78°F. That's why the best time to plant roses in Southern California is either in spring or fall.
Personally I think fall is a terrific time to plant roses. The exception may be if you live well up north where bitter winters come on quick and early, but for most of us it's a good time. Here in our zone 7/6 foothills of the Blue Ridge I start planting in late August when the nights turn cooler.
The right time to plant is about six weeks before the first predicted frost date in the fall. This gives them time to establish roots so they have the best chance of surviving the winter and emerging in spring. Don't plant too early, though.
While you can plant roses in the fall, well before the first frost (6 weeks), you will see little growth and blooming until the following spring.
Fall is the second best time, toward the end of October or in November, if the soil is still reasonably warm. The plant will do better the longer it has to reestablish itself before winter cold arrives. You can transplant roses in mid-season, say June or July, but it's risky.
Roses like morning sun whenever possible. Morning sun burns the dew off the roses and makes them less likely to suffer from mildew and other diseases. However, afternoon sun tends to be stronger than morning sun so, if you are only able to provide the rose with a half day of sun, choose the afternoon over the morning.
Roses are generally regarded as full-sun plants, and they usually aren't considered for shade gardens. But even if your garden does not quite get the recommended six to eight hours of full sun, you may still be able to grow select varieties.
They should also be planted in well-drained soil that is rich in organic matter. In especially hot climates, roses do best when they are protected from the hot afternoon sun. In cold climates, planting a rose bush next to a south- or west-facing fence or wall can help minimize winter freeze damage.
Vegetables that can be planted in August include leafy greens such as lettuce, spinach, collards, kale and mustard. Radishes, turnips, beets and carrots can all be started from seeds in August.
Some good candidates to plant now include hydrangeas, daylilies, lilies, sedums, ornamental grasses, peonies, and bearded iris. Just be sure you keep your new plants well watered if the weather is hot and dry. Mulching the beds also helps preserve soil moisture.
Dahlias are an obvious choice when it comes to what to plant in August, as they will flower right up to the first frosts and several varieties bring added interest with bronze foliage. You can also rely on long-blooming salvias, astilbes, sunny rudbeckias and gaillardias, asters, sedums and heleniums.
Once they begin to grow, you can start fertilizing your roses. We fertilize our roses three times during the growing season in April, June and August with an organic fertilizer such as Rose Tone™.
It's not too late to plant in your garden! In much of the country, summer still is full steam ahead in August. In other regions, the hint of cooler evenings mean the growing season is beginning to slow down. But regardless of where you live, there's plenty of time left in the season left for growing things!
Simply keep the roses at the height, and in the shape, you prefer. When you cut back flowering stems, leave 2 or 3 buds on the summer growth. In the cold season, prune English roses by 1/3 to 2/3 of their height. Almost all roses will quickly grow back and recover if you make any mistakes.
After several days of below freezing temperatures, create a mound of soil, compost, shredded leaves or evergreens 8 to 10 inches deep over the base of the plant. Mounding keeps the rose uniformly cold, which reduces the chance of damage caused by cycles of freeze and thaw.