Plant care guide

Anthurium Not Blooming? Fix the Light First

Updated

Why is my Anthurium not blooming?

An anthurium that grows leaves but no flowers is most often short of light. Low or unbalanced feeding, old spent blooms left on the plant, cold, and root problems from wet mix can also hold flowering back.

What to do first

Move the plant to the brightest spot that gets no direct sun on the leaves, such as near an east- or west-facing window. Then feed lightly through the growing season and cut off spent flower stems at the base.

A healthy anthurium can flower through much of the year. UF/IFAS Extension’s Anthurium fact sheet says flowering species bloom 4 to 6 times a year, with each flower lasting about six weeks. So a plant that has made only leaves for months is telling you something about its conditions.

Light is the first thing to check. The RHS anthurium overview says too little light will prevent flowering. NC State Extension says too little light causes fewer blooms and slower growth on the Anthurium genus.

Check 1: Is it getting enough light?

UF/IFAS Extension’s interiorscape anthurium guidelines put it plainly in their problem table: many leaves but few or no flowers means the light level is too low. The fix is more light.

Signs the plant is too dim:

  • It sits well back from a window, or behind other plants.
  • Growth is slow overall, which NC State also links to low light.
  • It has a full set of healthy leaves but no new flower stalks.

Where to move it:

  • The RHS suggests a west- or east-facing window, or a south-facing window shaded by net curtains or thin blinds.
  • NC State says south- or west-facing windows are best, but direct sun can scorch the leaves.
  • Clemson Extension’s anthurium care notes advise bright but indirect light for maximum flower production.

The goal is bright, not burning. UF/IFAS reports that several cultivars flowered continuously indoors at about 1,080 lux (100 foot-candles) for over a year and a half. That is bright interior light, not a dim corner.

Watch for overcorrection. UF/IFAS links bleached leaf centers with brown tips to excess light, and broad tan blotches to sunburn.

Check 2: Is it fed, and with what?

NC State notes that insufficient light or nutrient deficiencies can reduce flowering on Anthurium andraeanum. For both the genus and the pigtail plant, Anthurium scherzerianum, it says a high-phosphorus fertilizer encourages more blooms.

How much to feed:

  • The RHS growing guide recommends feeding regularly from April to October with an orchid fertiliser.
  • UF/IFAS suggests a monthly balanced 20-20-20 fertilizer at a low rate of 50 ppm nitrogen under interior conditions.
  • Clemson’s author reports a plant that was never fed still flowered several times a year, so heavy feeding is not needed.

More is not better. UF/IFAS warns that overfertilizing indoors builds up salts and causes leaf margin and tip injury. Do not feed a plant whose roots are damaged.

Check 3: Are old blooms still on the plant?

NC State says pruning away old, spent blooms encourages more flowers. UF/IFAS also advises removing expired flowers. The RHS describes the only pruning needed as removing dead leaves or flower stems at the base.

A spathe that has turned green, faded or brown is finished. Cut its stalk off at the base with clean scissors. Wear gloves, because the RHS notes the sap can irritate skin.

Check 4: Warmth and roots

  • Temperature: The RHS gives 18–30 °C (65–86 °F) and warns that 10 °C (50 °F) or lower can damage the plant. UF/IFAS suggests 21–29 °C (70–85 °F) indoors, away from drafts and appliances that blow heat or cold.
  • Humidity: UF/IFAS Extension’s fact sheet recommends humidity above 50%. Below that, leaves lose their shine.
  • Roots: UF/IFAS links yellowing older leaves and root damage to excess water, and the RHS notes that soggy compost causes root rot. If leaves are yellowing in wet mix, sort out the roots before chasing flowers.
  • Pot size: the RHS recommends repotting every two or three years, moving up only one pot size.

What to expect after the fix

Flowers do not appear overnight. Give the plant time in its brighter spot before changing anything else, and change one thing at a time so you can tell what worked. Keep watering by the mix, feed lightly in the growing season, and remove each bloom as it fades.

Our anthurium varieties guide explains how flowering anthuriums differ from velvet-leaf types grown only for foliage. For feeding basics, see our houseplant fertilizer schedule. The anthurium hub collects our other anthurium pages.

Other anthurium problems we cover: watering frequency, overwatering, spider mites treatment, common problems, brown spots.

References

How this guide was put together: NC State Extension, UF/IFAS Extension, RHS, and Clemson Extension guidance.

Other Anthurium problems

Related plant care guides

Knowledge record: pg-anthurium--not-blooming