Plant guide
ディフェンバキア
Watering rhythm
Every 5–7 days
Dieffenbachia is a tropical plant native to Central and South America, known for its large leaves with striking white and yellow variegation. It's hardy and easy to grow, thriving in bright indoor spaces. Do note that the leaves are toxic, so placement matters if you have young children or pets at home.
Bright, indirect light is ideal—avoid direct sun. Keep temperatures above 15°C (59°F), ideally 20°C (68°F) or warmer. Aim for 50–70% humidity and position it away from dry spots to keep the leaves glossy and healthy.
Light and temperature change a plant's metabolism, so the ideal cadence shifts with the seasons.
Spring
Every 4–6 days
Summer
Every 3–5 days
Autumn
Every 5–7 days
Winter
Every 8–12 days
Water thoroughly once the soil surface feels dry, letting water drain freely from the bottom of the pot. Always empty the saucer afterward—sitting water invites root rot. Wait until the soil has dried out a bit before watering again. Mist the leaves regularly to keep them looking their best.
Quick lookup from symptom to likely cause and action.
| Symptom | Likely cause | What to try |
|---|---|---|
| Leaves turn yellow and drop | Usually caused by overwatering or placement in a cold spot, both of which make roots prone to rot. | Check soil dryness before watering, and move the plant to a warmer location above 15°C (59°F). This should improve things quickly. |
| Leaves curl or develop brown tips | The air around your plant is too dry, or the soil isn't getting enough moisture. | Mist the leaves and surrounding air regularly. Check that soil moisture is appropriate and adjust your watering routine if needed. |
| New growth stops or slows down | Not enough light, or the temperature is too low. | Move your plant to a brighter location and keep the temperature at 20°C (68°F) or above—especially important during winter in cooler climates. |
| Leaves look sticky or you notice tiny insects | Scale insects or spider mites have likely moved in. | Gently wipe the leaves with a damp tissue to remove the bugs. If the problem persists, you may need to apply an insecticide. |
| Roots are sticking out of the soil, or water doesn't drain well | The plant has outgrown its pot and needs more room to develop. | Repot into a container one size larger in spring, using a quality potting mix formulated for houseplants. |
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