Also known as Madder · 3 saves
Rubia
Rubia, the genus most gardeners know as madder. We track 1 varieties; the ones most used by real gardeners.
The 1 most-saved Rubia varieties
Species of Rubia
Each one is a parent of the varieties above.
Track your Rubia in Sow
Save the Rubia you grow and get care reminders timed to your zone.
Rubia questions
How many types of Rubia are there?
The Sow catalog tracks 1 distinct Rubia varieties. The most popular — ranked by 3 real gardeners — are shown first above.
What zones does Rubia grow in?
Across its varieties, Rubia covers USDA Zones 6–9. Individual varieties differ — each plant page lists its exact range, and Sow filters the catalog to your zone automatically.
When does Rubia bloom?
Most Rubia varieties bloom in summer. Staggering early, mid, and late varieties extends the genus's season in one bed.
Which Rubia 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.