Cover your patio furniture with table linens that have sunflowers on them. Choose tablecloths, napkins or seat cushions with large sunflower pictures. Patio umbrellas that look like sunflowers or are covered in sunflowers are also available. Complete the look by hanging sunflower decorations from the umbrella frame.
String sunflower-shaped lights along the fence, on porch railings or on the beams of the house. You can also cluster them around one beam or at the end of a railing so it looks like it is covered in glowing flowers. Choose outdoor string lights so they are more durable as the whether changes. If you have extremely cold or wet winters, you'll want to take them inside in the fall.
Stake individual sunflower lights into the ground. These lights should either be LED or solar and come on metal stakes you drive into the ground. Cluster them in one area so it looks like you have a small sunflower garden, or use them to make a border stand out. Staked lights also complement the string lights in the evening.
Attach a bucket or durable vase to fence posts, and fill them with synthetic or dried sunflowers. Paint sunflowers onto the bucket to complete the look. Dried sunflowers won't last as long but give a nice fall, harvest look, while synthetic sunflowers work well year-round.
Fill two tall, narrow metal buckets with sunflowers, and set them on either side of the entrance so they greet guests as they enter and exit. For example, set them on either side of the deck stairs, the gate or at the start of a path. Use freshly harvested sunflowers as decorations; the seeds will dry, and you can eat them later.