Between climbing roses pots or ground, ground planting wins for stronger growth and bigger blooms. Roses in the earth grow larger root systems and access more water and nutrients. They handle temperature swings far better than potted plants too. If you have the garden space, put your climber in the ground and you'll see the difference within one season.
I ran this exact experiment two years ago with two identical New Dawn plants from the same nursery batch. One went into a 20-gallon container and the other into a prepared garden bed. By the end of the first summer, the ground-planted rose had three times more canes and double the flower clusters. The container rose looked healthy but grew at half the speed. After the second winter, the ground rose came back full and strong. The potted one lost two canes to freeze damage even though it sat against a sheltered wall.
The science behind this gap is simple. Ground-planted climbing roses send roots down 2 to 3 feet into the soil where they tap into stable moisture and a steady supply of nutrients. Container roots hit the pot wall and start circling, which chokes the plant's growth within 2 to 3 years if you don't intervene. Soil temperature stays more stable underground too. This protects roots from freeze-thaw cycles that crack pots and kill exposed roots.
Growing climbing roses in containers still works if you lack garden space or rent your home. You need to set the right foundation though. Use a pot that holds at least 15 gallons (57 liters) with drainage holes in the bottom. Choose a heavy ceramic or stone pot so the weight of a full-grown climber doesn't tip it over in the wind. Plan on repotting or root pruning every year to prevent the roots from strangling themselves. Water your potted climber 3 times more often than a ground-planted one because containers dry out fast in summer heat.
Some container climbing roses handle tight root space better than others. Climbing Pinkie and Eden adapt well to large pots since they grow smaller root systems. Stick with varieties that top out at 8 to 10 feet for pot growing. The 20-foot monsters will outgrow any container within a single season and give you nothing but headaches.
For ground planting, dig a hole 24 inches wide and mix the native soil with compost before backfilling. For containers, use a heavy pot and move it to a garage or shed for winter in zones below 7. Either way, give your climbing rose the best start you can and it will grow into the showpiece you want.
I still grow one climber in a pot on my deck because the spot gets perfect morning sun. It takes more work than my ground-planted roses, but the blooms right outside my kitchen window make it worth the extra effort. Just know what you're signing up for with pots and plan your watering schedule from the start.
Read the full article: Best Climbing Roses for Your Garden
