Also known as Senna · 22 saves
Cassia
Cassia, the genus most gardeners know as senna. We track 2 varieties; the ones most used by real gardeners.
The 2 most-saved Cassia varieties
Track your Cassia in Sow
Save the Cassia you grow and get care reminders timed to your zone.
Cassia questions
How many types of Cassia are there?
The Sow catalog tracks 2 distinct Cassia varieties. The most popular — ranked by 22 real gardeners — are shown first above.
What zones does Cassia grow in?
Across its varieties, Cassia covers USDA Zones 8–10. Individual varieties differ — each plant page lists its exact range, and Sow filters the catalog to your zone automatically.
When does Cassia bloom?
Most Cassia varieties bloom in late summer, early summer. Staggering early, mid, and late varieties extends the genus's season in one bed.
Which Cassia should I choose?
Start from the most-saved varieties above — popularity across thousands of gardens is a strong signal of reliability — then filter by your zone and sun. In the Sow app you can preview any of them in a photo of your actual yard before you buy.