Anthurium Flowers Turning Green: Why It Happens and How to Fix It

Why It Happens (Not What You Think)

The 'flower' of an anthurium is actually a colored leaf called a spathe. Spathes have a finite lifespan of 4–8 weeks. As they age, chlorophyll moves into them and replaces the anthocyanin pigments — so they slowly turn green. This is the plant's natural process: green spathes are still photosynthesizing and feeding the plant.

How to Slow the Color Loss

1. More light, but not direct sun. Bright indirect light extends spathe vibrancy. East-facing windows are ideal in U.S. apartments.
2. Switch to bloom-booster fertilizer. Use 3-10-10 (phosphorus-rich) every 6 weeks instead of balanced NPK.
3. Stable humidity above 50%. Dry air accelerates aging.
4. Cool nights (62–68°F). Triggers new bloom production.

Getting New Blooms

An anthurium in good conditions produces a new spathe every 6–10 weeks. If yours hasn't bloomed in 6+ months, the issue is almost always low light. A 24W LED grow light running 10 hours daily fixes this within 2–3 months for most U.S. apartments.

Frequently asked questions

Should I cut off the green anthurium flowers?

Yes, once they've fully faded. Cut the stem 1 inch above the soil. This signals the plant to produce a new spathe. Cutting earlier doesn't speed up the next bloom.

Why are my anthurium leaves yellowing while the flowers fade?

Usually overwatering. Anthuriums like to dry between waterings — soil should feel barely damp 2 inches down before re-watering. Check root health if leaves keep yellowing.

Is the anthurium dying because the flowers turn green?

No — color fading is the natural end of each bloom cycle. The plant is healthy. New blooms emerge if conditions are right.

Sources and references

• Anthurium Cultivation — University of Florida IFAS Extension

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