The choice of camellias pots or ground depends on your climate zone and garden space. Both options work well when you meet the plant's basic needs. Ground planting gives you a low-care setup with stable roots over the long run. Pots give you full control over your soil mix and the option to move the plant inside when cold weather hits hard.
A container camellia has some real perks that ground planting can't match. You get full control over the soil mix and can dial in the perfect acidity without fighting your native dirt. If you live in USDA zones 5 or 6 where winters run too cold, you can bring the pot inside a garage or cool room to keep the plant safe. I grow one japonica in a large pot on my patio and love how easy it is to manage the soil pH at a steady 5.8 all year long.
The downside of pots is that you have to stay on top of watering year round. Ground soil holds moisture much longer than a pot does on its own. My patio camellia needs water twice a week in summer and once a week even in winter. When I first started with pots, I forgot to water for two weeks one cold January. The leaves started to curl and drop. That taught me that winter watering matters just as much as summer care for potted plants.
In-ground camellias have the easier long-term setup. The soil around the roots stays at a more stable temperature year-round. Ground moisture evens out the dry and wet spells better than a pot can. Once you get the soil right at planting time, an in-ground camellia can go years with just a bit of mulch and one yearly feeding. The roots spread out and anchor deep, making the plant stronger and more drought-proof over time. I have three japonicas in the ground that I barely touch all year and they bloom like clockwork every winter.
If you go with a pot, start with one that is at least 18 inches (45 cm) wide and has good drain holes at the bottom. Viriar guidance says this is the minimum size for healthy root growth. Size up the pot every 2 to 3 years to keep the roots from binding up. A root-bound camellia stops blooming and grows weak. Use a mix made for acid-loving plants like azaleas and blueberries.
For your camellias in pots, use a compost mix made for plants that like acid soil. Top-dress with fresh acid mix once a year in early spring to keep the pH where your plant wants it. When winter comes, move the pot to a sheltered spot near a wall or under a porch roof. This shields the roots from deep freezes while still letting the plant get the cold hours it needs to set buds for next year.
My advice is to plant in the ground if you live in USDA zones 7 through 9 and have the right soil. You will save yourself a lot of ongoing work that way. If your soil pH is too high or you live in a colder zone, pots make total sense for you. Either way, match the growing method to your own setup. Your camellia will do just fine for years to come once you give it a good home.
Read the full article: Camellia Japonica: A Complete Guide