I have a two-year-old Spiralis whose long stems are not spiraling, other than two or three near the bottom. It's grown huge in the time I've had it, and it's putting out flower-like buds now, so I'm fairly sure it's healthy. I don't know what I should do to get the spirals. I think part of the problem may be that it only gets morning sun and is in the shade by noon. I give it plenty of water, and have fertilized twice so far. Is there something more I should be doing?

I don't know a thing about Juncus effusus but we have a few listed in the database and some types appear to have more of the spiral habit than others: https://garden.org/plants/sear...

Some seem to be more spirally than others. I have noticed that the more spirally ones seem to be planted in a bog or on a pond edge.