Purple Ruellia

Name: Purple Ruellia
Brand: Outdoor Dream Builders

Ruellia simplex

Rich purple blooms open fresh each morning from spring to fall, making it a reliable source of garden color and cut flowers.

Hardy in USDA zones 8-11; root-hardy in the low desert where frost knocks it back and it resprouts in spring, evergreen in the mildest winters.

AMWUA Notes

A tough, long-blooming perennial for moderate water; use sterile cultivars or deadhead to keep its reseeding in check.

Care Guide

💧Watering

Water weekly in summer to keep it blooming; it tolerates drought but flowers best with regular moisture and even handles periodically wet soil.

✂️Pruning

Shear back by a third to a half whenever it gets leggy to force fresh flowering stems; cut to the ground after frost to renew for spring.

🌱Fertilizing

A light spring feeding boosts bloom, though it flowers well without it.

🛡️Pests

Largely pest-free; its main drawback is aggressive spread by seed and rhizome, so deadhead to prevent it becoming weedy.

☀️Seasonal Notes

Blooms spring through fall and dies back in hard frost, returning quickly in spring; can seed around, so site where spread is welcome.

🪨Soil

Adaptable to most soils including clay and periodically wet ground; tolerant of poor soil and even boggy spots.

💧Drainage

Needs moderate soil.

🌱Nutrient Needs

Low feeder.

🌰Propagation

Division, cuttings, or seed; spreads aggressively by rhizomes and seed. Use sterile cultivars to limit spread.

📐Spacing

1–1.5 ft

🌳Roots & Placement

Spreads aggressively by rhizomes and self-seeding and can become weedy; contain it or plant sterile cultivars.

•Use its upright purple wands as a vertical color accent in beds and along walls.
•Deadhead and confine it where you do not want its vigorous self-sowing to take over.
•Group several for a mass of daily fresh blooms good for cutting.
•Full sun to light shade; tolerant of heat and occasional wet spots near drainage.