Romneya coulteri Matilija Poppy

Plant Specifications 

• Height & Spread: 4–8 feet tall, 6–10 feet wide
  
  
• Growth Habit: Spreading perennial from rhizomes
  
  
• Light Requirements: Full sun
  
  
• Water Requirements: Low; very drought-tolerant once established
  
  
• Fertilizer Requirements: None needed; avoid rich soil to prevent excessive spread
  

Romneya coulteri, or Matilija Poppy, is a showstopping California native with large white flowers featuring bright yellow centers. Blooming in late spring and summer, it brings bold contrast and movement to dry slopes or garden borders. This perennial spreads by underground rhizomes, forming impressive clumps that thrive in sunny, well-drained sites. It’s ideal for naturalized landscapes and provides excellent habitat value for pollinators.