Guidelines
Koicha should always use Zengo, and usucha should always use Kigo. (Of course, in chaji, you do what fits your toriawase).
My note: I haven’t heard that you must use kigo, but you don’t get the opportunity to in koicha, so you really ought to in usucha.
My repo
Note: most of these originally came from https://wiki.chado.no.
Seasonal
- Gomei (January)
- Gomei (February)
- Gomei (March)
- Gomei (April)
- Gomei (May)
- Gomei (June)
- Gomei (July)
- Gomei (August)
- Gomei (September)
- Gomei (October)
- Gomei (November)
- Gomei (December)