How to Grow Trimming Rose Of Sharon - Plant Care & Tips

By NorwichGardener Team   /   2024

Trimming rose of sharon is a simple process that can be done to improve the appearance of your plant. By trimming off the dead or diseased leaves, you will allow the plant to focus its energy on new growth. This will also help to improve air circulation around the plant, which can help to prevent fungal diseases.

How to Grow Trimming Rose Of Sharon - Plant Care & Tips

Popular name

  • Althea
  • Hibiscus syriacus
  • Rose of Sharon
  • Swamp Rose Mallow
  • Tree Mallow

Basic info

  • The best time to trim your rose of sharon is in late winter or early spring.
  • Cut back the plant by about one-third to one-half its overall height.
  • Make sure to use sharp, clean pruning tools to avoid damaging the plant.
  • Begin by removing any dead, diseased, or damaged branches.
  • Next, trim back any branches that are crossing or rubbing against each other.
  • Then, prune back any lengthy branches to create a more compact and balanced shape.
  • Finally, remove any suckers or water sprouts that are growing from the base of the plant.
  • After trimming, be sure to apply a balanced fertilizer to help encourage new growth.
  • Rose of sharon can also be pruned in late summer or early fall, although doing so may reduce the number of flowers produced the following year.
  • If you have any questions or concerns, be sure to consult with a professional before trimming your rose of sharon.

Related plant:
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Planting Process

  1. For trimming rose of sharon, first step is to remove all the dead branches and leaves from the plant.
  2. Cut back the main stem by about one-third its length.
  3. Cut back all the lateral branches to about six inches in length.
  4. This will encourage new growth from the base of the plant.
  5. Next, fertilize the plant with a balanced fertilizer.
  6. Water the plant deeply after fertilizing.
  7. Place the plant in an area that receives full sun.
  8. Keep the soil moist, but not soggy.
  9. Deadhead the flowers as they fade to keep the plant looking neat.
  10. Prune the plant lightly in late winter or early spring to shape it.

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The Soil

About soil condition, the rose of sharon prefers well-drained soil that is high in organic matter. The soil should be moist but not wet. If the soil is too wet, the roots will rot. If the soil is too dry, the plant will not be able to absorb enough water.

Light requirement

Just like other members of the hibiscus family, rose of sharon requires full sun to produce the most flowers. It will grow and bloom in partial sun, but the overall plant size may be smaller and the number of flowers reduced. You can expect rose of sharon to flower from mid-summer to early fall when little else is in bloom.

Good Temperature

The temperature condition for rose of sharon is important. If it is too hot, the rose of sharon will not bloom. If it is too cold, the rose of sharon will not bloom. The ideal temperature condition for rose of sharon is between 70-80 degrees Fahrenheit.

Humidity Requirement

Ideal humidity condition for this plant is 50% or below. Plants grown in higher humidity are more likely to suffer from foliar diseases, such as powdery mildew and gray mold. If you live in an area with high humidity, you can still grow rose of sharon, but you'll need to take extra care to keep the plant healthy.


The fertilizer, this family of plant foods provides essential nutrients to promote healthy growth in plants, including roses of sharon. The three primary nutrients found in fertilizer are nitrogen, phosphorus, and potassium (often referred to as NPK). Nitrogen is responsible for leaf growth, phosphorus promotes root development, and potassium strengthens the overall plant.

About light

Pruning your rose of sharon helps to ensure that it remains healthy and blooms abundantly. While the plant can tolerate some pruning, it is best to prune it back hard every few years to encourage new growth. When pruning, be sure to remove any dead or diseased wood, as well as any branches that are crossing or rubbing against each other.

Plant Propagation

Propagation is usually done by rooting stem cuttings taken from the desired plant. The cuttings should be taken from new growth and be at least 4 inches long. Cuttings should be taken from the desired plant in late spring or early summer. The bottom leaves of the cutting should be removed, and the cutting should be placed in a pot filled with moistened potting mix. The pot should be placed in a location with bright, indirect light. Keep the potting mix moist but not soggy. Once the cutting has rooted, it can be transplanted to a larger pot or outdoor garden.

Plant Growth

Usually, the plant growth rate is rapid during the first 2 to 3 years after planting. After that, the rate slows some but is still fast for another 2 to 3 years. Then, it slows even more and levels off. Some varieties, such as 'Dazzle' and 'Fancy Feathers', continue to produce new growth even after 20 years.

Common Problems

Common problems for this kind of plant are listed below. If you have any of these problems, consult a professional before attempting to trim your plant. -The plant is too tall and is in danger of toppling over. -The plant has become so leggy that it no longer has a pleasing shape. -The plant is producing few or no flowers. -The plant is infested with pests or diseases.

List to Know

  • Remember to deadhead your rose of Sharon regularly to encourage new growth.
  • Use a sharp knife or pruning shears to avoid tearing the plant.
  • Cut back the plant by about one-third its total height after flowering is finished for the season.
  • Try to shape the plant as you trim it to encourage fuller growth.
  • Remove any dead, diseased, or damaged wood from the plant.
  • Make sure to sterilize your pruning tools before and after use to avoid spreading disease.
  • Apply a balanced fertilizer to the soil around the plant monthly during the growing season.
  • Water the plant deeply and regularly, especially during dry periods.
  • Place a layer of mulch around the plant to help retain moisture in the soil.
  • Check for pests and diseases regularly and take action to control them if necessary.

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