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Glam Journal

What is wrong with my begonia

Author

Elijah King

Updated on April 27, 2026

Begonia plants can collapse and die from advanced stem rot diseases. … Rhizoctonia fungus causes fine webbing and sunken, brown, dry areas of stem rot at the soil surface. Botrytis stem rot symptoms include a soft, brown rot in begonia stems, with gray, fuzzy Botrytis spores in the rotting stem tissue.

How do I revive my begonias?

Clean the pot with bleach, then add sterile potting mix. Replant the begonia and water it, making sure the water drains well, as root rot is more common in waterlogged soil. If the plant is outdoors, move the plant to new location to help prevent reinfection by the root rot fungus.

Why are the leaves falling off my begonia?

Water. The most common reason begonia leaves rot is too frequent watering. Begonias are succulent plants with stems that are mostly water, which makes them very sensitive to moisture and fungus. … Eventually, those leaves rot and then fall off.

What do Overwatered begonias look like?

Look for the following symptoms and conditions that make it more likely that overwatering is the cause of your begonia drooping; Yellowing leaves, particularly affecting the lower leaves first. Brown leaf tips despite good humidity and soil moisture. Leaves dropping from the plant, often with soggy, limp petioles.

Why is my indoor begonia dying?

Begonias grown indoors are especially susceptible to root rot and overwatering. … This will help prevent accidental overwatering, which is the main reason for begonias dying when grown indoors. Also, when you water your begonia houseplant, make sure to water below the leaves in order to avoid inviting a fungal disease.

How often should I water a begonia?

A good rule of thumb is to water every two to four days. When it’s hot and dry you’ll need to water more often than when the air cools down and the soil holds more moisture. Begonia plants in full sun will also require more water than plants in shady locations.

What causes begonias to rot?

Caused by the Pythium ultimum bacteria that becomes activated in wet soil conditions, begonia stem rot is usually fatal to the plant. Keep the risk to your plants low by ensuring your soil is well-draining and that you do not overwater.

How do you know when a begonia needs water?

The main rule of thumb for watering begonias is to not let the soil dry out completely. Stick your finger into the soil, and if it dry to your first knuckle, it’s time to water. Avoid overwatering, which will cause the foliage to turn yellow and eventually drop.

Do begonias like shade or sun?

Most begonias grow best in part shade (4 to 6 hours of direct morning sun a day), or filtered sun (as through trees). Most will tolerate full shade (no direct or filtered sun), but won’t be as dense and usually have fewer flowers. A few grow in full sun.

How do I know if my begonia has root rot?

When begonia stem and root rot infects your plants, they are likely to show a variety of symptoms. These include darkened foliage, blackened and rotting roots, rotting stems just above ground level, and collapsing crown.

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How do you save Overwatered begonias?

  1. Move your plant to a shady area even if it is a full-sun plant. …
  2. Check your pot for proper drainage and, if possible, create additional air space around the roots. …
  3. Water only when the soil is dry to the touch, but do not let it get too dry. …
  4. Treat with a fungicide.

Why do begonias turn brown?

The most common cause of brown leaf edges is that your Begonia is incredibly dry. Your Begonia likes consistent moisture. … Begonias do not like soggy soil or to sit in water, so be sure to discard any water that has accumulated in the saucer after watering.

Is my begonia dead?

If you suspect your plant is dead but you aren’t sure, the fastest way to tell if it is dead is to check the stems. The stems of the plant should be pliable and firm and will have a green cast on the inside if they are still alive. If the stem is mushy or brittle, check the roots for the same conditions.

How do you care for potted begonias?

  1. 1) Plant begonia in pot that allows about 2 inches of space all the way around the roots. …
  2. 2) Begonias like to sit in locations that have daily full to partial morning sunlight.
  3. 3) Put the plant on a regular watering schedule. …
  4. 4) Feed the plant a balanced houseplant fertilizer once a month.

How do you stop begonia root rot?

  1. Remove and destroy infected plants, increase ventilation, and avoid moistening leaves by watering.
  2. Sterilize soil or media before replanting. …
  3. Do not overwater, and keep water-hose ends off the ground.
  4. Be careful not to bury begonia seed too deeply when planting.
  5. Do not overfertilize.

Why are my begonia leaves curling?

Temperature – Since many begonia plants are native to tropical regions, curling begonia leaves may occur when plants have been exposed to wide temperature change. Ideally, the plants will grow best when temperatures do not fall below 60 F.

How do you treat stem rot?

Control is difficult because once symptoms are observed, damage to the stem or roots is usually severe. For small flower beds and potted plants, use a soil drench of a recommended fungicide. A fungicide could also be mixed with soil prior to planting as suggested by the manufacturer. Allow excessively wet soils to dry.

Can you use Miracle Grow on begonias?

Once a week apply half strength (1/2 T Miracle Grow or other soluble plant food per gallon) fertilizer solution in place of regular watering, being sure to give the basket enough so that liquid seeps from the bottom of the pot. Tuberous begonias are not heavy feeders, so don’t overdo it.

Should you mist begonias?

Water the soil directly, keeping the leaves dry. Begonias also require high humidity to thrive, a challenge when growing them indoors. … You also should not spray begonias with water, especially rex begonias. Misting does create humidity, but begonias are prone to powdery mildew, so it’s better to keep the leaves dry.

Why won't my begonias grow?

If the shade is too dense, your begonias won’t grow properly. Choose an area with indirect sunlight and partial shade. If you don’t have any indoor window space for potted begonias, you’ll need to use a fluorescent lamp in order to provide them with a bit of light.

What month do begonias flower?

Begonias grow in moist, shady gardens where they have well-drained soil, wind protection and filtered or indirect sunlight. A typical blooming season starts in June and ends with the first frost. They are so easy to grow that a broken stem or leaf stalk stuck in soil often roots as a new plant.

Can begonias survive in shade?

They do best in situations with shade or morning sun/afternoon shade. Most varieties have flowers that hang down a little, making tuberous begonias ideal for hanging baskets and window boxes rather than garden beds and borders. No matter where you grow them, make sure they have good drainage to prevent rot.

Do begonias like coffee grounds?

A well draining soil mix is a must. Begonias do not like wet feet and will easily drop leaves if they are over watered. … Begonias benefit from an acidic soil, which the peat moss gives it. Adding some used coffee grounds to the soil will work wonders for begonias.

Do begonias like lots of water?

Begonias rely on moisture in the soil to keep their tuberous roots healthy and active. However, as noted earlier, too much water can cause their roots to rot and decay. When planted in flowerbeds, begonias require about an inch of water per week to thrive.

What does an overwatered plant look like?

You will also notice indentations forming directly above the growths on the top sides of the leaves. Stunted slow growth accompanied by yellowing leaves is also a symptom. … If your plants have yellowing leaves and old leaves, as well as new leaves that are falling at the same accelerated rate, you are overwatering.

How do you keep begonias healthy?

Culture: Foliage begonias should be located in a bright spot away from direct sunlight. Keep soil evenly moist, allowing it to dry only slightly between waterings. Reduce water in winter. Always avoid wet or water-logged soil.

Is Epsom salt good for begonias?

While many gardeners attest to using Epsom salt on their plants to enhance their pH levels or add magnesium, it may not be ideal for begonias specifically. If your plants lack magnesium sulfate, it’s better to find fertilizers sufficient in this mineral.

Do begonias do better in pots or in the ground?

Because begonias do best in warmer temperatures that don’t fall below 60 degrees Fahrenheit, they are often used as houseplants and in shaded summer beds. … Tuberous begonias are suitable options for begonia container gardens as they work well with the light texture of potting mix, and they work as bedding plants, too.