Getting a Rieger Begonia to Re-Bloom

A Rieger begonia is a man-made hybrid. These indoor flowers usually get no taller than 1 1/2 feet. While these are known as the winter flowering begonia they can be obtained year round. These flowers are very easy to grow and flourish with indirect, bright light.

When to Re-bloom

You will need to begin the steps involved in re-blooming once you have noticed that your plant has begun to slow down and has stopped blooming.

  • Begin by cutting your flower several inches, where it is just above the soil line.
  • Place your Rieger begonia in a cool area that gets a medium amount of light. You should keep the plant dry or at least put it in the shade while it is outdoors in the summertime.
  • When new growth begins to form, you can repot the plant into a bigger container.
  • Place it back into the indirect bright light while fertilizing and watering it.
  • To get your Rieger begonia to rebloom you will have to put it in the same environment it would get during the fall and winter.

Re-Blooming Hints

Also, use pruning to your advantage, and cut back after first flowering. This forces the plant to go into survival mode to recover the damage from the pruning. What will happen at this point is that the plant will grow again, and attempt to make even more flowers, thus giving you the beautiful blooms you were looking for a second time around.

Sometimes all the plant needs is a brighter spot in the winter hours to which you’ve set it. By moving it to a bright spot, you can help the plant yield more flowers by giving it the motivation to photosynthesize (or, make food using sunlight, as all plants do) more intensely.

If your begonia is large, cut it back down to the soil line. Then, if you need to reduce the light, you can bring it to a medium-light spot and keep it a bit on the dry side. This will help start your plant in the dormancy stage, which can be counteracted by bringing it back inside.


Keep the temperature cool. The ideal temperature for a Rieger begonia is about 70 degrees F during the day and about 60 degress F at night. This tells the plant that it’s cooler than it actually is—especially if you have it inside during the hot summer conditions. Remember, they don’t particularly like direct sunlight, high heat, nor high humidity, and can get stem or root rot, or mildew as a result of the conditions.

As long as you take the proper steps to keep your winter begonia safe from harsh conditions, you can get it to rebloom over and over again. It’s even possible, if you coax and gently force your plant, to have your Rieger begonia yield you blooms more than once a season, and even all year long.