Calla lily not flowering or dropping buds: causes and what to do
8 results in the diagnosis tree begin with no flowers or dropped buds, 2 of them marked likely when the answers fit. They are ordered here for Calla lily (Zantedeschia aethiopica), using what its sources say about light, cold tolerance, feeding and flowering and one problem recorded for it.
Sources last read 14 September 2026.
Zantedeschia aethiopica, commonly known as calla lily, arum lily, and death lily, is a species of flowering plant in the family Araceae, native to southern Africa in Lesotho, South Africa, and Eswatini. Wikipedia, CC BY-SA 4.0
Native range: S. Africa (seasonally dry tropical). Also sold as African lily, altar lily, Arum Lily, Brosimun aethiopica, Calla aethiopica and Egyptian lily.
What Calla lily’s sources say that bears on this
- Light
- Full sun, Partial shadeRHS · read 13 September 2026
- Cold tolerance
- H4 — -10 to -5°CRHS · read 13 September 2026
- Feeding
- Pests, diseases and other problems: the leaves and flowers may be eaten by Japanese beetles.NC State Extension · read 13 September 2026
- Flowering
- Flowers white; blooms in summerNC State Extension · read 13 September 2026Flowers white in spring and summer; yellow in spring and summerRHS · read 13 September 2026
How this shows up on a Calla lily
Leaves but no flowers
The calla lily flowered well at first, then less each season, while its leaves stayed healthy and new stems grew longer.
Its source places it in full sun, partial shade. Flowers cost more than leaves, and a plant kept darker than that keeps growing leaves while it builds few buds or none.
Telling it apart: Whether the stems have stretched. Leafy, stretched growth with no buds points at light; normal spacing points at timing, feeding or a season it has not had.
RHS · read 13 September 2026Possible causes, likeliest first for a Calla lily
Most likely not enough light to flower
Ranked higher because Calla lily's recorded problems point this way.
- Full sun, Partial shade RHS · read 13 September 2026
Why: Flowering costs a calla lily more energy than growing leaves, and in low light many plants keep growing leaves without building flower buds.
What to try:
- Move it to the brightest window you have, over a week or two rather than at once.
- Check its page here for how much light its sources describe.
What would settle it: Whether it flowers after a season in the brightest spot you have. Buds forming within a few months settles it.
Most likely a reaction to the change
Why: Buds are the most expensive thing a calla lily is building, and a sudden change in light, temperature or water is often enough for it to abandon them.
What to try:
- Leave the calla lily in one place, facing the same way, while it is in bud.
- Keep the soil evenly moist rather than letting it dry out completely.
What would settle it: Whether the next set of buds holds with the calla lily left in one place. That settles it.
This may be its ordinary timing
- Full sun, Partial shade RHS · read 13 September 2026
Why: Plants sold in flower have often been brought into bloom by growers under controlled light and temperature.
What to try:
- Look up the calla lily's page here for its light and soil, and match those first.
- Give it a full year of steady care before treating the lack of flowers as a problem.
What would settle it: Whether it is growing well otherwise. A calla lily making healthy new leaves is building toward flowering; one that is not has a care problem to solve first.
Less likely for a Calla lily, still possible
Questions
- What usually causes no flowers or dropped buds on a Calla lily?
- For Calla lily: most likely not enough light to flower, most likely a reaction to the change and this may be its ordinary timing.
- How can I tell which one it is on my Calla lily?
- Which of these is closest? It flowered before in my care, but has not since; Buds form, then drop before they open; It has not flowered since I bought it, under a year ago.
- What do Calla lily's sources say about its light?
- RHS: Full sun, Partial shade.
- What does this look like on a Calla lily?
- The calla lily flowered well at first, then less each season, while its leaves stayed healthy and new stems grew longer. Telling it apart: Whether the stems have stretched. Leafy, stretched growth with no buds points at light; normal spacing points at timing, feeding or a season it has not had.
- Is Calla lily safe to handle while I check it?
- Its sources list it as toxic to cats, dogs and people. Wash your hands after handling the roots or sap, and keep trimmings away from pets.
Other plants that show no flowers or dropped buds
Flamingo flowerBuds form and fall before they open
African violetFlowering stops while the foliage carries on
Barberton daisyFlowering stops while the foliage carries on
Bearded irisBuds form and fall before they open
Bigleaf hydrangeaBuds form and fall before they open
Bird of paradiseFlower buds shed while still closed
Something else wrong with the Calla lily?
What this does not cover
This page orders a decision tree's results using a plant's sourced care. It has not seen your plant, its pot or its window, and two problems at once are common: that is the usual reason a confident answer turns out wrong. The questions in the diagnosis tool narrow it further than a list can.