Cast Iron Plant
Aspidistra elatior
Through the year 🗓️
☀️ Summer now
Keep it out of direct sun and wipe the big leaves down so they can actually breathe.
🍂 Fall
Stop feeding and stretch the watering interval as growth winds down.
❄️ Winter
Water sparingly and let it rest. It happily tolerates cool rooms other plants would sulk in.
🌱 Spring
Divide or repot only if truly crowded, and start the light once-a-month-or-two feeding.
The details
Light & placement
- Light
- Low to medium indirect; one of the best true low-light plants, though direct sun bleaches the leaves
- Ideal PPFD
- 50–150 µmol·m⁻²·s⁻¹
- Grow-light distance
- 24–36 in below LED
Water & feed
- Watering method
- Water when the top 2 in are dry, then let it drain. It forgives forgetting for weeks but sulks in constantly wet soil.
- Fertilizer
- Balanced feed at ½ strength every 1–2 months in spring–summer; none in winter.
Home & habit
- Soil
- Any well-draining houseplant mix; pH 5.5–6.5, utterly unfussy
- Humidity
- Any; it shrugs off dry air (30%+)
- Temperature
- 50–80 °F; tolerates brief dips near freezing
- Mature size
- 2–3 ft tall clump
- Repotting
- Every 3–5 yrs at most; it resents disturbance
- Propagation
- Division: split the rhizome into clumps of 2–3 leaves in spring.
When something looks wrong
- Overwatering signs
- Yellowing leaves, brown mushy stem bases, sour-smelling soil
- Underwatering signs
- Dull leaves with dry brown tips and splitting edges
- Common pests
- Spider mites and scale, occasionally; mostly nothing
Common problems 🩺
The usual suspects when Cast Iron Plant looks unhappy. Most houseplant trouble is watering or light, not disease — see all plant problems if you are not sure which plant is the culprit.
Brown tips and edges
Likely cause
Tap-water minerals or fertilizer build-up — it is very sensitive to both.
What to do
Use filtered water and feed sparingly, no more than a few times a year.
Bleached or scorched patches
Likely cause
Direct sun. This is a deep-shade plant.
What to do
Move it well back from the window; it is happiest in low light.
Yellowing leaves
Likely cause
Overwatering — almost the only way to kill a cast-iron plant.
What to do
Let the top 2 inches dry out and water sparingly, especially in winter.
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