Place your potted roses in a location that gets at least seven hours of direct sun each day. On patios and decks, this may mean moving the pots around over the course of the day to keep them in the sun.
Container cultivation
Position the container before filling with compost as it may be too heavy to move once planted up. Roses love sunshine and should receive sun for at least half the day. However it is important that container-grown plants do not dry out or they will become prone to powdery mildew.
If you plan to overwinter your container rose outside, they should be in plastic or wood containers. Ceramic and terra cotta pots will crack if the endure freeze and thaw cycles. Right after the first frost winter protection should be applied, usually middle or late November. “Bury” the entire pot in leaves or mulch.
Roses are excellent plants for growing in pots. English Roses, with their shrubby, bushy habit are ideal for growing in large pots and containers. Unlike many other potted plants, English Roses will flower in fragrant flushes throughout the summer and into the fall.
While most rose bushes love the sun, the intense afternoon heat can be a major stressor for them, especially when bud and bloom rose bushes (those growing, budded, or blooming in their nursery pots) are planted during the hotter period of the growing season.
Roses love sunshine, but they tend to struggle when temperatures rise above 85℉. Many of us are experiencing much hotter summers than we're used to, making the need for heat-tolerant roses increase, even in some northern climates. Roses experiencing heat stress may experience leaf scorch, wilting, and leaf loss.
Add Mulch. Make the most of your watering regimen by keeping roses mulched. Organic mulch reduces evaporation and keeps plant roots cool during hot summer days. Use a square-point shovel to add mulch to beds and create a layer about 3 to 4 inches thick.
How Long Do Potted Roses Last? Container roses can last between two to three years, then will require repotting so they can keep growing with fresh soil. If your plant has outgrown its pot, be sure to buy a new one with drainage holes!
WATER OFTEN
Water whenever the top inch of soil feels dry to the touch, saturating the soil until water runs from the drainage holes and soil media no longer bubbles. Daily watering may be needed during the heat of the summer, even if the container is a large one.
Roses that grow outside need to be watered or they will die in a few days. Roses that grow inside are a bit more forgiving, but they will wilt after about a week or two without water. Additionally, other factors, like the type of rose you have and the current weather, will affect how long a rose lasts without water.
To keep your roses from drying out, they can still dry out even if they are dormant, it is advised that you provide your large pots with a gallon of water once every two weeks. The pots do not need to be, and should also not be wet, but neither should the soil be allowed to completely dry out.
Wait until a hard killing frost has caused most of the leaves to fall. You may also want to wait until the temperature has dropped into the teens for several nights. Prior to covering, remove any foliage or other debris that might harbor disease for the next season.
Potted roses can be planted all year round. The only time we recommend that you don't plant is when the ground is frozen, waterlogged or in drought conditions.
Roses for Full Sun
Roses thrive in full sun. When they get anywhere from 6 to 8 hours of sun a day, they bloom vibrantly and to their fullest. Any variety will be spectacular when grown in these conditions. They are hardy in zones 4-9 and with the right care, can come back to thrive year after year.
It might be a good idea to provide some shade from that intense sunlight late in the afternoon. Plant a medium-sized shrub or build a pony wall in this location to provide a less intense microclimate for their growth.
Since the goal is for the roses to absorb as much of the water as possible, watering using a drip system and in the morning when it's not as hot, is what we recommend. Avoid using overhead sprinklers as this method can cause fungus and disease to the leaves.
By adding coffee grounds to your roses, you create a barrier that will keep pests away and allow your rose bushes to thrive. So if you're wondering whether coffee grounds are good for roses, the answer is a resounding yes! Coffee grounds are an inexpensive and readily available organic fertilizer for your roses.
Drooping rose buds and leaves turning yellow are some of the signs of overwatering. Once you notice them, you should immediately take action.
For optimal enjoyment of the blooms, early spring would be a good idea. Container roses should be spaced two to three feet apart so the leaves of each plant do not touch. Good air flow between shrubs helps to prevent rose diseases. Stage the containers in an area that gets a minimum of 6 hours of full sun each day.
Watering roses in containers can be a bit of a delicate dance. Too much water and they get soggy, rotted roots, too little and they'll wilt and weaken. Roses in the ground only need to be watered once or twice a week, but roses in containers will drain faster and heat up more quickly.
Overwinter potted roses by moving them into an unheated garage or to a sheltered place next to the south side of your house. In regions with extra-cold winters, protect each plant by placing it, pot and all, in a roomy cardboard box and packing the box with shredded newspaper or dry leaves.
Because of stress caused by the intense heat, the flowers that your rose bushes produce in mid- to late-summer are often smaller and the colors more washed out than those produced in the spring. The flowers will not last as long after they open.
Use Lukewarm Water
Extreme temperatures can shock the blooms and shorten their life, so it's better to use lukewarm or room-temperature water. The amount of water to fill the vase is important too—not too much or too little—so filling the vase 3/4 full of water is just about right.
Roses are a very hardy plant. Established roses can withstand almost anything, through drought, scorching sun and even fire. However, it does not always mean they will thrive through these conditions, especially if the plant hasn't been in your garden long or is planted in a pot.