El Anthurium It is one of the most appreciated plants for its exotic beauty, resistance and ease of flowering throughout the year, presenting flowers of striking colors such as red, pink, white or even yellow. If you have started in the world of indoor plants, the anthurium has probably caught your attention due to its robust appearance and elegance. However, even the strongest specimens can show signs of weakness, being the brown or dry-spotted leaves one of the most frequent and alarming.
Knowing in depth the causes behind this problem, the different solutions and the best care is the key to making your anthurium shine again. green, healthy and full of lifeIn this article we explain All the reasons why your anthurium may have brown leaves, how to identify them and what to do to restore their health, integrating the latest recommendations and best practices for the optimal care of this wonderful plant.
Why do anthurium leaves appear brown?
When the leaves of your anthurium begin to show brown spots, dry edges or turning completely brown, is usually a symptom of a problem with the plant's environment, care, or even its internal health. These are the main causes, how to identify them, and step-by-step solutions:
Exposure to direct or insufficient sunlight
One of the most common mistakes in anthurium care is incorrect placement relative to light. Anthuriums They need good ambient lighting but never direct sunlight.In their natural habitat, they grow under the shade of trees in tropical rainforests, receiving soft, filtered light.
Signs of excess light:
- Dry or burnt brown-yellow spots, especially on the most exposed leaves.
- Dry or discolored ends.
- Flowers without color or wilted prematurely.
Signs of low light:
- Leaves that lose color intensity.
- Green or undeveloped flowers.
- Loss of flowering or slow growth.
What to do? Place your anthurium in a place with indirect and abundant lightIdeally, it should be placed near a north-facing window or with light curtains to prevent direct sunlight. If the window is west or east, keep the plant about 2-3 meters away; in front of south-facing windows, a distance of 3-4 meters is advisable.
Avoid unprotected windows or situations where sunlight hits the leaves even through glass, as this can cause severe burns.
Improper watering: excess or lack of water
Anthurium is especially sensitive to the quantity and quality of watering. Both the excess as well as lack of water can cause the appearance of brown leaves, affecting the overall health of the plant.
Excess watering:
- Lower leaves first yellow and then brown.
- Soil that remains wet for a long time, with a sticky and heavy feeling.
- Presence of mold, mildew or bad smell due to rot.
- Root rot and leaf drop.
In case of excess, the plant may be suffering root rot or fungal attackIt is necessary to reduce watering, remove the plant from the container, remove wet soil and rotten remains, apply a systemic fungicide and transplant into new substrate. Let it dry for 3-4 days before watering again.
Lack of irrigation:
- New leaves turn yellow and then brown.
- Dry, loose soil and a light pot.
- General wilting, loss of firmness in stems and leaves.
Solution: Submerge the pot in a container of water for 30 minutes to rehydrate the roots, and adjust the watering so that the substrate always remains slightly moist, never dry or waterlogged.
How often should anthurium be watered?
In warm months, water your anthurium 2 or 3 times a week, depending on the ambient temperature and humidity. The rest of the year, once or twice a week is usually sufficient. Do this only when the top two centimeters of the substrate are dry to the touch.
If you use a saucer under the pot, empty it after each watering to prevent water buildup.
Substrate and irrigation water quality
Success in growing anthurium depends largely on the pH and substrate compositionThis plant needs a acidic medium, with an ideal value between 4 and 6, to adequately absorb nutrients such as iron.
Substrate problems:
- Neutral or alkaline substrates make it difficult to take essential nutrients, causing chlorosis (yellow leaves with green veins that later turn brown).
- Compact or poorly aerated soils cause waterlogging, rot, and brown leaves.
Solution: Plant your anthurium in a special potting mix for acid-loving plants, preferably with blond peat, coconut fiber, or specific orchid mixes if you don't have access to another. Prepared potting mixes from brands such as Flower, Battle, or Boix are ideal. Make sure the pot has drainage holes and add expanded clay pebbles or gravel to the base to prevent waterlogging.
As for water, rain wear whenever possible, or if the water in your area is very hard, let it sit for 24 hours before watering or use filtered water.
Lack of space in the pot
An anthurium that has stopped growing or shows brown leaves with no obvious explanation may be suffering from lack of root spaceDon't wait for the roots to emerge from below; if the plant seems unstable or its roots form a dense root ball, it's time to repot.
¿Cómo hacerlo?
- Choose a pot at least 20% larger than the previous one, always with drainage holes.
- Fill with acidic and aerated substrate.
- When transplanting, keep the soil level the same as the original and water the transplant to settle the substrate well.
Temperature, humidity and air circulation
The anthurium is from tropical origin and requires a hot and humid environmentIf you live in dry areas or with air conditioning/heating, humidity drops and brown, dried leaves may appear.
Optimal conditions:
- Daytime temperature: 15-25 °C
- Nights above 12°C whenever possible
- Relative humidity: 60-80%
Tips to maintain environmental humidity:
- Spray water on the leaves every two days (preferably in the morning, with lime-free water).
- Place a humidifier near the anthurium.
- Place the pot on a tray with damp pebbles.
Avoid: Cold drafts, heaters, areas next to radiators or open windows for long periods of time.
Need for manure and fertilization
Anthuriums, like all potted plants, deplete the nutrients in their substrate over time. A lack of essential minerals can cause the leaves to turn brown, shrink, or cause the plant to fail to flower abundantly.
How to fertilize anthurium?
- Use liquid fertilizer specifically for acid-loving plants or flowering plants.
- Fertilize every two or three weeks in spring and summer, following the manufacturer's instructions.
- Do not fertilize during the cold months, when growth slows.
Avoid excessive fertilizer, as it can burn the roots and cause the opposite problem: brown leaves due to toxicity.
Fungal diseases and pests
The irregular brown spots with yellow edges or whitish areas, can indicate the presence of fungi, especially if they appear after excessive moisture. Anthuriums can be attacked by:
- Fusarium: Causes wilting and brown spots.
- Phytophthora: Causes rot and necrosis of leaves and stems.
- Anthracnose: Fungi that cause brown spots on leaves and flowers.
If you notice these symptoms, act quickly:
- Remove affected leaves with clean, sterilized scissors.
- Apply an organic or systemic fungicide spray.
- Improves ventilation (no drafts) and reduces watering frequency.
Among the pests, there may appear mealybugs, aphids and red spidersInspect the underside of the leaves and manually remove the insects or use a specific insecticide if the infestation is numerous.
Pruning, maintenance and transplanting
Good maintenance promotes the health and beauty of your anthurium. Prune wilted flowers, dry or damaged leaves Whenever necessary, cutting as far down the stem as possible with disinfected tools. This way, the plant focuses its energy on new shoots and strong flowers.
Transplanting should be done every 2 to 3 years, preferably in spring, always using new soil and a larger container.
Toxicity and precautions
It is important to keep in mind that the anthurium It is toxic if ingested, both for people and pets, due to the presence of calcium oxalates. Keep the plant out of reach of children and pets, and seek medical advice if accidental ingestion occurs (it may cause vomiting, nausea, or mucous membrane irritation). You can learn more about names of indoor plants to learn about other dangerous species.
- Dry and cold air: May cause leaf dryness and brown edges. Avoid placing anthurium near vents or open windows in winter.
- Lack of transplantIf the plant does not develop, the flowers do not last or are small, check the condition of the roots and transplant if necessary.
- Division of suckers: Every 2-3 years, you can separate offshoots growing at the base and transplant them to rejuvenate the mother plant and prevent it from weakening.
Caring for an anthurium and keeping its leaves free of brown spots isn't complicated if you know the species' specific needs. Pay attention to lighting, watering, humidity, substrate, and fertilization, check the plant periodically for pests or diseases, and perform regular maintenance. This way, you'll enjoy a healthy and decorative anthurium, capable of brightening any room with its green leaves and exotic flowers for many years.
