Choosing plants for outdoor pots that can thrive year-round depends on your climate, the size of the pots, and the specific conditions of your outdoor space. Here are some options for plants that are generally well-suited for year-round outdoor container gardening:

1. Evergreen Shrubs: These plants provide greenery throughout the year. Some good options include boxwood, dwarf conifers, and holly. They can withstand cold winters and hot summers.
2. Ornamental Grasses: Grasses like fountain grass or Japanese blood grass can provide interesting texture and color year-round. They are hardy and low-maintenance.
3. Perennials: Some perennial flowers can be grown in containers, offering seasonal blooms. Consider plants like lavender, heuchera, or sedum for a mix of colors and textures.
4. Herbs: Many herbs, like rosemary, thyme, and sage, are well-suited for pots and can be harvested for culinary use year-round.
5. Succulents: Succulents are low-maintenance and come in various shapes and sizes. They’re ideal for sunny locations and require little water.
6. Dwarf Trees: Some smaller varieties of trees, such as dwarf citrus, Japanese maple, and dwarf fig trees, can be grown in pots and provide structure and interest year-round.
7. Bulbs: You can plant spring-blooming bulbs like daffodils, tulips, and crocuses in the fall for beautiful blooms in the spring.
8. Winter-Flowering Plants: If you’re in a milder climate, you can opt for winter-flowering plants like pansies, cyclamen, or winter heather to add color during the colder months.
9. Climbing Plants and Vines: Certain climbers like ivy, clematis, or evergreen vines can be trained to grow up trellises or supports in pots, adding vertical interest.
10. Ground Covers: Some ground cover plants like creeping Jenny or vinca can be used in pots and will provide year-round green coverage.

When choosing plants for outdoor pots year-round, consider the following tips:

1. Container Size: Use large, insulated pots for better insulation and root protection from temperature fluctuations.
2. Proper Drainage: Ensure containers have drainage holes to prevent waterlogged soil, which can harm plant roots.
3. Soil Quality: Use a well-draining potting mix suitable for the specific plants you choose.
4. Sunlight: Be aware of the sunlight requirements of your chosen plants and place the pots accordingly.
5. Watering: Adjust your watering schedule based on the seasons, as container plants may need more water in the summer and less in the winter.
6. Protection: In extremely cold climates, consider protecting pots during harsh winter weather by moving them to a sheltered area or wrapping them.

Remember that your specific climate and the microclimate of your garden can greatly influence plant selection. Consult with a local nursery or garden center for recommendations tailored to your area.