Zinnia Profusion Orange in a pot that gets partial shade?

You have to adjust to your climate, so while Zinnias are usually planted in full sun, it really depends on where you live. I plant all my flowers in the shade here, since we have months of over 100 degree weather. I would put some gravel at the bottom of the container for drainage. I wouldn't plant Zinnias too close together, I don't know if you got the regular size, which gets large and is a great cutting flower, or the dwarf variety. You don't say the size of your pot, so I don't know how many gallons you are talking about. Since Zinnias get large, I would plant it in the center, (probably one, but since you bought a whole tray, maybe I would squeeze three in there somehow.) I would plant marigolds and dusty miller maybe some bachelors ons in the pot, and maybe some pansies, depending on if it gets hot where you live. If it gets hot, skip the pansies. For the pots that get shade, I would plant the Zinnias in the center and put impatients at the base, or maybe some petunias for contrast. They should have helped you at the garden center, the staff usually knows what would be best in a container. (Sometimes if a pot is huge, like a wine barrel, people put styrofoam popcorn at the bottom of the pot so you don't have to use a ton of soil.) you might also consider planting a stake like a bamboo stick in the center of the container, Zinnias usually get large, and you can tie them to the stake so they don't fall over if you got the larger variety.