Claire WhitakerBy Claire Whitaker

Updated November 2026

Yellow leaves on a calla lily plant are usually a sign of overwatering, natural dormancy, or a nutrient problem. In this guide, you’ll learn how to tell which one is happening, how to correct it, and how to keep the plant’s foliage green through the growing season.

Find Out Why the Leaves Are Yellowing

Start by checking the soil and the pattern of yellowing before you change anything. Calla lilies (Zantedeschia) send clear signals, and the location and timing of the yellow tells you a lot.

Shopping for one? See our guide: 5 Best Humidifiers for Indoor Plants That Keep Leaves Happy.

  • Entire lower leaves yellow and collapse: usually overwatering or root rot.
  • Yellow leaves in late summer, with the plant slowing down: normal dormancy.
  • Yellow between green veins on newer leaves: likely nitrogen or iron deficiency.
  • Yellow edges or brown tips: low humidity, salt buildup, or inconsistent watering.

Fix Overwatering and Root Rot

Calla lilies grow from rhizomes that rot quickly in waterlogged soil. If the soil stays wet for days, the roots suffocate and the leaves yellow from the bottom up.

  1. Lift the plant or tip the pot out and check the rhizomes. Firm, pale tissue is healthy. Soft, brown, or mushy tissue is rotting.
  2. Cut away rotted sections with clean, sharp scissors, then let the rhizome dry in the air for a day or two.
  3. Repot in fresh, well-draining potting mix in a container with drainage holes.
  4. Water only when the top 1 to 2 inches of soil feel dry. Then water thoroughly and let excess drain away.

Recognize Normal Dormancy

Many calla lilies naturally go dormant after blooming, often in late summer or fall. The leaves yellow and die back as the plant pulls energy into the rhizome. This is not a problem to fix. Reduce watering gradually as the foliage fades, then stop watering once the leaves are fully yellow. Store the rhizomes in a cool, dry, dark place for about 8 to 12 weeks, then replant them in fresh soil in spring.

Correct Nutrient Deficiencies

If new growth is pale and the veins stay green, the plant likely needs nutrients. Nitrogen deficiency causes overall yellowing of older leaves, while iron deficiency, often caused by alkaline soil or water, shows as yellow between green veins on new leaves.

Feed the plant with a balanced liquid fertilizer at half the label strength every 3 to 4 weeks during active growth. Stop feeding when the plant goes dormant. If you suspect iron deficiency, check your soil pH with a test kit. Calla lilies prefer slightly acidic to neutral soil, roughly pH 6.0 to 7.0.

Common Mistakes to Avoid

  • Watering on a fixed schedule instead of checking the soil first.
  • Using a pot with no drainage holes or sitting the pot in standing water.
  • Fertilizing a dormant plant, which can burn the rhizome.
  • Cutting off yellow leaves while they are still green at the base, which can weaken the plant.
  • Assuming every yellow leaf is a disease when the plant may simply be resting.
  • Soil moisture meter: takes the guesswork out of watering by showing moisture levels at root depth. View on Amazon
  • Well-draining potting mix: helps prevent the waterlogged conditions that lead to rhizome rot. View on Amazon
  • Soil pH test kit: lets you check whether iron-related yellowing is linked to soil alkalinity. View on Amazon

For more on indoor care, see Houseplant Calla Lily Plant Care Indoors: A Step-by-Step Guide. If you’re unsure whether your plant is a perennial that can overwinter outdoors, Are Calla Lily Plants Perennials? Zones, Care and Overwintering covers zones and storage. Yellowing on other houseplants often has similar causes, so Why My Plant Leaves Are Turning Yellow: Causes and Fixes That Work is also worth a read.

FAQ

Should I cut off yellow calla lily leaves?

Yes, once a leaf is fully yellow or brown, remove it at the base with clean scissors. If the leaf is still mostly green, wait, because it may still be feeding the plant.

Can a calla lily recover from root rot?

Often yes, if the rhizome is still firm in most places. Cut away all soft tissue, repot in dry mix, and water sparingly until new growth appears.

How often should I water a calla lily?

Water when the top 1 to 2 inches of soil feel dry, which may be once a week or less depending on light, temperature, and pot size. Always let excess water drain freely.

Conclusion

Yellow leaves on a calla lily are most often caused by overwatering, dormancy, or a nutrient gap, and each has a clear fix. Check the soil, look at where the yellowing appears, and adjust your watering or feeding to match. With steady, moderate care, the plant should return to healthy green foliage.

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Claire Whitaker

About Claire Whitaker

Claire Whitaker is part of our editorial team and reviews and edits our plant care Q&A guides, checking product details against manufacturer specifications and owner feedback.