The planters below are filled with confires like Hinoki cypress which adds a wow factor to the pot. Don't let your pots just sit empty this time of year. There are so many different plant materials that you can fill them with that add depth, interest and color.
The flowering blue star creeper and grass like Japanese sweet flag grass play supporting roles but are important to the interest and overall look of the planting.
By using conifers in large garden pottery you can interplay the evergreens with other plant materials. Try to use a large enough pot to make the desired effect. Select a pot that has a bold and bright color to it. Nothing pastel will work here. You want bold fall colors with deep tones and glossy finishes. Then plant your main evergreen plant. Fill in with flowering plants like the cool seasonal annuals shown in the photo. Use at least 2 or 3 with contrasting colors to add depth. Flowering plants may fade over time but they are easy to replace and should last through fall and well into winter.
It isn't always easy to decide what plants in stunning garden planters you want to leave out. Obviously you will need to continue to water the plant materials. Not as much as growing seasons but unless they are sitting out unprotected and can absorb any rain that lands on the plants you will need to keep the soil from drying out. Therefore, the planters need to be high fired, glazed and waterproofed to with stand the freezing temps.
We would still recommend that when it get's that cold you empty the planters out and store them if possible. Any standing water will freeze and could possible crack the pots. Do NOT use terracotta clay pots. They are low fired,, meant to absorb water, breathe and will crack if exposed to freezing temps.
Don't leave your beautiful garden and patio areas bare this time of year. Purchase a bold colorful planter, fill it with evergreens and keep a colorful display all year long.