Why Columbine Lower Leaves Turn Yellow: Mulch, Heat, or Watering?

Lower leaves of columbine yellow while top growth looks healthy.

Common Causes

• Recent mulch application (can cause temporary nitrogen tie-up).
• Rapid warm-up in spring.
• Watering during hot sun (leaf scorch).

Action

• Snip off yellow portions.
• Columbines prefer cooler weather with some sun for bloom.

Nothing serious—just cosmetic adjustment.