This is a clever idea! From LATimes:
Recycle Palm Fronds into a Centerpiece!
The fallen palm fronds left from recent winds haven’t been a nuisance for master gardener Jill McArthur. Armed with a pruning saw, the Glendale garden designer has been recycling the fronds as arresting table centerpieces using succulent cuttings.
To create a centerpiece, McArthur first looks for a nice line. If a frond is too large, she puts it in her car and cuts it down at home. She then sprays the hollow surface with a low-VOC clear sealant so water won’t leak through to the table. Next she adds cactus soil mix and succulent cuttings to make a low-maintenance, low-water arrangement.
The palm fronds, which can be as long as 12 feet, form “fabulous boats” that look great on a long table or a mantel. She also likes to pair two boats, as shown at the top of the post.
“The plants seem to be very happy,” McArthur said. “You can trade succulents in and out. They are strong and not heavy, so they are easy to transport. The natural tone of them is so beautiful — the brown is fantastic. I personally like the ragged edges of the smaller ones. The whole point is for them to look like found objects.”