Althea Plant: How to Grow and Care? 

 May 20, 2022

By  admin

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Althea plants are a type of succulent plant. These plants are easy to grow and care for. They require little attention, but can still produce beautiful flowers.

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Altheas, often known as the Rose of Sharon, are summer flowers. Altheas comes in a variety of hues, including pink, purple, blue, and even white, despite its rose-like name.

Summer isn’t known for its beautiful blossoms, but you may add vitality to your summer landscape by planting Altheas. This attractive deciduous blooming shrub with large tropical blooms.

The hibiscus family’s Althea Plant is one of the simplest plants to cultivate in your yard. Althea might be the correct option for you if you’re seeking for plants that produce large flowers yet need little upkeep.

This is also a fantastic plant for novices who are just getting started with gardening.

We’ll discuss about Altheas and how to cultivate them on your lawn or garden in this article. Are you prepared to learn? Let’s get started.

Facts about Althea

Before we go any farther, let’s review some fundamental Altheas information.

Common titleRose of Sharon or Althea
Scientific nameSyriac Hibiscus
HeightApprox. 3 to 13 feet
It’s blooming season!Between July and November,
Zone of difficulty (s)Zone 5- 8
Native toAsia

This is a low-maintenance plant that simply has to be watered, fertilized, and pruned.

Althena Plants Types

It is best to understand about the many varieties of Althea shrubs before planting them.

Altheas is a member of the Malvaceae (or “Mallow”) family, and it is more of a Mallow than a rose of Sharon.

There are different Altheas to consider with varying size, shape, color, and It’s blooming season!. You can choose your favorite plant type based on what looks good in your garden, the prevailing climate, and your personal preference.

#1. Althea Aphrodite

Aphrodite Altheas are captivating and one of the biggest types, as their name indicates. This plant may grow up to ten feet in height. The most remarkable feature of Aphrodite Altheas, however, is its large red blossoms.

Under the brilliant blue sky, the pink tone of the flowers will undoubtedly give a touch of romance to your summer environment. Each magnificent flower is large enough to cover a 4 inch circumference.

Diana Althea (#2)

If you like immaculate white flowers as much as Princess Diana did, Diana Althea is for you. The flowers are large enough to draw notice. The petals have a waxy feel and a ruffled form and are pure white in color.

Diana Altheas develop into shrubs, making them ideal for use as hedges or bushes.

#3. Satin Azurri Blue

The Azurri Blue Satin is taller, standing at 12 feet. So, if you have a large lawn, you may cultivate this Althea variety. Azurri Blue Satin may be grown in a container provided the growth is kept under control by trimming.

This variety’s most noticeable characteristic is its huge, gorgeous blueish blooms.

Lucy Althea, #4

Do pink flowers appeal to you? You’ll adore Lucy Althea as well. It is a fast-growing plant that may grow up to 10 feet tall. But there’s more: this Althea type takes the least attention, so just plant it and provide it with some basic nutrients, and you’re done!

Purple Pillar #5

Purple Pilar is a huge Althea cultivar that may reach a height of 16 feet and a spread of 3 feet. Purple Pilar’s blossoms are breathtaking. Even the most despondent of minds will be drawn to the purple petals with a deeper crimson core.

How to Care for an Alocasia Silver Dragon as a Bonus Read

Althea Plants’ Health Benefits

Althea flowers are beautiful and may transform your yard. Apart from its aesthetic appeal, this plant also has additional advantages that may persuade you to grow it in your lawn or garden.


This feature of Althea Plants may be their USP, as we have previously said. These bushes don’t need much care to thrive. All they require is regular watering and pruning, and they’ll be fine. Altheas may be the best match for you if you have limited gardening time.

Pollinators are attracted.

The large, beautiful blossoms of the Althea attract butterflies and other pollinators. Altheas are a good choice if you want butterflies to visit your garden on a frequent basis. Growing these trousers will also benefit you if you want the bees to assist pollinate other plants in your yard.


Altheas are perennial plants, so you just have to plant them once and they will bloom year after year.

Suitable for pots

Although this plant may reach a height of 16 feet if properly pruned, it can also be grown in pots. So, if your garden lacks adequate soil, you may simply make a soil mix in a pot and grow it there.

Altheas Planting Preparations

Now let’s look at how to get your garden ready for Altheas.

The Correct Location

Choose a location that is debris-free and has well-drained soil.


Altheas thrive in direct sunshine, so making sure your plant has enough of it is crucial.

Plants of the Right Variety

The next step is to choose the appropriate plant. You’re probably familiar with the several sorts of Altheas, so choose one that fits the size of your garden and your particular preferences.

Soil preparation

You would also need to Soil preparation to plant the new sapling. The soil can be prepared by amending it with compost or fertilizers.

The fresh Sapling is being transferred.

The optimum time to transplant a young Althea seedling is during the dormant winter months. This will aid the new little plant’s root development during the winter and spring months.

Gardening with Altheas

It has already been said countless times that growing Althea Plant is simple and requires little work. However, this is only feasible if the plant is developing under the right conditions.

Here, we’ll go through the methods that will allow you to plant and nurture your plant in the best possible environment.

Required conditions

The following are some examples of optimum growing conditions for Althea:

Althea plants thrive under bright light. As a result, it is recommended that they be planted in an area with at least 5 hours of daylight.

These plants may become very huge and spread out. As a result, if they don’t have enough room to develop, they may push out other plants in the garden. As a result, depending on their types, you’ll need to offer them with space.

Altheas need well-drained soil, as previously stated. Soggy or waterlogged soil may cause root rot and a variety of other problems. You should also avoid planting your Althea in a muddy region.

Solid pH levels should be between 5.5 and 7.5 for this plant. As a result, checking the pH of the soil before planting is recommended.

It’s Planting Time!

Are you unsure when is the best time to plant your Althea?

Timing is vital because it ensures that your plant grows in the best possible environment with little or no insect and pest interference.

The aptest It’s Planting Time! Altheas is between spring and winter. That being said, as we have mentioned above, if you plant the new sapling in the winter, it can grow the roots throughout the winter and spring months.

Temperature & Humidity

Then there’s the temperature and humidity.

Heat-loving Althea bushes may tolerate high humidity provided there is enough air movement. This plant, on the other hand, can endure temperatures as low as -20 degrees Fahrenheit.


Because Altheas grow so huge, it’s best to space them out 3 to 6 feet apart, depending on the type. Some of the kinds, such as Purple Pillar, may need at least 10 feet of area.

Althea Plant Care Instructions

After learning about the growing requirements for Altheas, it’s time to plant your Rose of Sharon.

  • You’ll need to dig a hole twice the width of the container before planting your seedling.
  • Squeeze the edges of the container housing the Althea Plant to loosen the root balls. Then, while holding the container’s base and the plant, pull the latter.


  1. Remove the althea root ball by cutting the container’s sides. Then lightly spray some water around the roots to loosen the dirt.
  2. In the hole you’ve dug, place the Althea root ball. Remember to keep the root at the same level as the earth.
  3. Add the modified dirt to the hole (refer to the above section for soil preparation).
  4. Remember not to choke the Althea root by covering it with too much dirt.
  5. Water the area well but not to the point of saturation.
  6. To save water and limit the frequency of watering, cover the area with mulch. The (wood) mulch would also disintegrate and provide nourishment to the soil.

Althea Plant Care Procedures

Altheas, although being a simple plant, need some work to get started, especially when grown from saplings.

#1. Water

The most important consideration is watering. We’ve already explained that these plants like wet, well-drained soil. Remember to water your plant once or twice a week. Every week, make sure the soil gets at least 1 inch of water.

#2. Fertilizer

Following that is fertilization. Because you prepared the soil before planting your Rose of Sharon, the plant will have more nourishment. Remember that your plant isn’t a heavy feeder and would benefit from a fertilizer that’s high in potassium (K), low in phosphorus (P), and medium in nitrogen (N).

Organic compost may also be used to cover the soil once a year.

#3. Pruning

Pruning is necessary to maintain the size and form of your plant. Because altheas are ideal for hedging, the regular must be clipped. If your plant is blossoming, however, avoid trimming. Instead, wait until the blossoming season is complete before pruning the mother plant’s dead branches by hand.

You may even trim it from the bottom up to make it seem like a tree.

#4. Mulch

Mulch near the base of your plant may be really beneficial. Organic mulch helps the solid retain moisture for a longer period of time and protects the plant from cold temperatures.

Deadheading (#5)

The dried blossoms may be deadheaded to stimulate further blossoming. It also prevents an overabundance of seed pods from developing.

#6. Winterization

In the hardy zones, Altheas do not need any additional winter care. They should, however, be maintained out of the way of strong, dry, and chilly winds. If you reside in a colder climate, you may insulate the plant by adding an additional layer of mulch. However, take careful not to suffocate your plant.

#7. Pest & Disease

Protecting Altheas against common pests and illnesses is part of their care. Japanese beetles are the major insect concern for this plant. Althea leaves may be eaten by these insects. As a result, it is preferable to check on them before they do harm. You may pick them up and toss them away, or you can kill them by putting them in a container with soapy water.

Blight, Aphid, and Canker are some of the additional pests that may affect this plant.

The following illnesses may affect your plant:

  • Leaf blight
  • Rust on leaves
  • Bud drop
  • Nematodes that cause root knots

Using insecticides and checking on your plant on a regular basis will help keep pests and illnesses at bay.


Q1. How long does Altheas take to mature?

Altheas have a medium rate of growth, growing one to two feet each year. As a result, maturation might take anywhere from 4 to 6 years (depending on the variety).

Q2. What is the It’s blooming season!?

Ans. During the summer, the Rose of Sharon produces blooms. The blooms are most abundant in July and August.

Q3. Can Althea be eaten?

Ans. Althea may be eaten. This plant is high in vitamin C, and its blooms, bark, and even leaves may be eaten.

Q4: Is Althea poisonous?

Ans. No, this plant is not harmful to people, cats, or dogs.

Q5. Why are my Althea blooms falling off?

Because of the hot weather, excessive humidity, heavy rains, or strong winds, your Althea buds may be falling.


In the summer, you may cultivate Althea Plants or Rose of Sharon as beautiful plants. These vibrant plants will liven up your summer garden and landscape with their big blossoms.

These are low-maintenance plants that may be grown and cared for by simply following the instructions outlined above. Anything would look beautiful on these gorgeous floral plants, whether you grow them as they are or trim them to give them a form.

Althea plants are known for their beautiful flowers and can be grown in a variety of ways. This article will teach you how to care for an althea plant. Reference: how to prune althea bushes.

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Emil Schoene

Born and raised in Austin, TX I come from a background of home renovation. By helping my family in my younger years with their construction business, I learned the ropes quickly and as I grew it became my passion that I still do today. Looking to share my knowledge with others. I invite you to leave comments on any post as I know you will have questions that you are not finding anywhere else.

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