How to Grow Callistemon - Planting & Caring

By Sharon & Team   /   Bush Category   /   2023

Callistemon, also known as bottlebrush plants, are native to Australia and make excellent ornamental plants. They are relatively easy to grow and care for, and can tolerate a wide range of growing conditions. Callistemon plants are available in a variety of colors, including red, pink, and white.

How to Grow Callistemon - Planting & Caring

Growing Easiness

Is it easy to grow Callistemon plant? The Callistemon plant is not difficult to grow, but it does require some basic knowledge. The plant is originally from Australia, and it is a member of the Myrtaceae family. The plant is an evergreen shrub that can grow to be about six feet tall. The plant has long, thin leaves that are green in color. The plant produces small, red flowers that bloom in the spring and summer. The plant is relatively easy to care for, and it does not require a lot of maintenance. The plant is a good choice for those who are looking for a low-maintenance plant that is still relatively easy to care for.

Plant Size

How big can it be? Sometimes, in room conditions and with a large pot, a Callistemon can reach 1-2 m in height.

Growth Rate

How fast is the growth? The average height of a Callistemon plant is between 1 and 3 meters. The plant typically has a slender trunk with reddish-brown bark and small, bright green leaves. The plant's flowers are usually red, but can also be pink, white, or purple. Callistemon plants are native to Australia and New Zealand.

Callistemon Basic Knowledge

Plant Form Bush
Family Myrtaceae
Origin Australia, Tasmania and New Caledonia

Lifespan, Perennial or Annuals

How long is the lifespan? The plant will live for an average of 20 to 30 years. However, some species have been known to live for up to 50 years. The plant generally flowers during the spring and summer months.

Ideal Temperature

What is the ideal temperature? Since it's a summer plant, it prefers room temperature. In winter, it is desirable to have a cool content on the veranda at a temperature of 42.8-44.6 degrees Fahrenheit. Otherwise, Callistemon can not bloom.


What about the humidity? If the air is too dry, the leaves of the plant will become brown and dry. The plant needs high humidity, so it is necessary to spray it every 2-3 days. Callistemon loves fresh air, so it is important to provide good ventilation.

Light Requirement

What amount of light this plant needed? known as bottlebrush, Callistemon are native to Australia. They are woody shrubs with evergreen leaves and red, yellow, or green bottlebrush-like flowers. The flowers are actually individual clusters of many small flowers. Bottlebrushes prefer full sun and well-drained soils. They are drought and heat tolerant once established. Most Callistemon are fast growing and can reach 6 to 10 feet tall.

Soil Composition

What is good soil for Callistemon? While most plants prefer slightly acidic soil with a pH between 6.0 and 7.0, callistemon (Callistemon spp.) is one of a group of plants known as acid lovers or lime haters. These plants prefer soil with a pH below 6.0. If you want to grow callistemon in your garden, you'll need to create an acidic soil environment or grow the plant in a container with acidic potting soil.

Watering Time

How much I must water Callistemon? Since this plant is drought-resistant, it does not require too much water. It is best to water with soft water once a week in summer and every 8-10 days in winter. It is also important that the substrate dries slightly between waterings to avoid water stagnation.

Fertilizing and Nutritient

About fertilizer. When and how much to fertilize Callistemon? From spring to autumn, every 2 weeks, use complex fertilizer without lime. It is good to use organic fertilizers.


How to reproduce Callistemon? The reason to write this is to inform the reader about how this plant is reproduced. This plant can be reproduced by apical cuttings or by seeds. Apical cuttings are done from August to March, at a soil temperature of 64.4-68 degrees Fahrenheit. Cuttings should be 5-8 cm long, and taken from the side shoots. The lower leaves should be terminated, and the sections should be treated with kornevin. The plant cuttings should be placed in a mixture of peat and sand, and then covered with a film. They should root at room temperature. Once they have rooted, they can be planted separately. Callistemon will bloom in 2.5-3 years. This plant can also be propagated by seeds. The seeds should be sown in March, on the surface of the substrate from peat and sand. The top should be lightly sprinkled with soil, and then covered with polyethylene. The seeds should be germinated in diffuse light at a temperature of at least 69.8 degrees Fahrenheit. It is important to form the crown by pinching the sprout at the correct height. In this case, the plant will bloom in 3-4 years.


Why Callistemon won't bloom? If you are lucky enough to have a Callistemon plant, or bottlebrush plant, in your garden, you will be rewarded with spectacular blooms in spring and summer. The flowers are without petals, but are made up of red stamens. Spicule inflorescences up to 5-15 cm long resemble a dishwashing brush.

Transfer or Repotting

How much I must water Callistemon? The plant is transplanted every year, as soon as new leaves appear. When the plant reaches a large size, it is enough only to change the top layer of the soil.

Caring The Callistemon

How to care the plant? The reason you should take your Callistemon plant in the garden for the summer is because it can be grown in open ground. It requires regular pruning after flowering, and shoots can be cut to a length of up to 50 cm.

Pests & Challenges

What is the challenge when caring Callistemon plant? The plant is quite popular, but at the same time, it is very capricious. Many gardeners are struggling with it. The leaves of the plant can wither from excessive watering or from a large number of fertilizers in the soil. In addition, the plant is affected by mealybugs, scale insects, aphids, thrips, and spider mites.

Toxic & Poisonous Type

Are Callistemon poisonous? The plant is safe for handling and is not harmful to children or animals if ingested. The sap may cause skin irritation in some people.