Persian Shield plant profile
Strobilanthes dyerianus
A perennial flower for partial sun.
Last updated .
When to plant
When to plant Persian Shield
Set Persian shield out after the last spring frost, in bright light with no direct hot sun. It is a tropical grown as a perennial only in zones 8b and warmer; in colder zones it is grown as an annual or a container/houseplant brought indoors before frost.
The calendar shows this cited seasonal window as an approximate band. It does not convert the season into frost-adjusted dates.
Open Persian Shield in my garden calendarShows the source-backed planting season, not frost-adjusted dates.
Growing conditions
- Sun
- Partial sun
- Soil pH
- 5 to 8
- Lifecycle
- Perennial
- Spacing
- 24 to 36 in apart
- Hardiness
- Zones 8b to 11bFind my hardiness zone
Common problems
Watch for these
Also watch for: frost tender, color fades in cool low light, spider mites and fungus gnats indoors.
Next steps
Continue with Persian Shield
Evidence trail
Evidence behind this profile
Original extension and institutional publications behind the planting, care, and safety facts on this page.
- Strobilanthes auriculata var. dyeriana (Persian Shield, Royal Purple Plant)
North Carolina Extension Gardener Plant Toolbox (NC State Extension). Supports general reference. Checked 2026-06-18.