How to Grow Rosmarinus - Planting & Caring

By Sharon & Team   /   Bush Category   /   2023

Rosmarinus, or rosemary, is an aromatic herb native to the Mediterranean. A member of the mint family, it is related to other herbs such as oregano, thyme, and basil. Rosemary is a perennial plant, meaning it can live for several years. With the proper care, rosemary can thrive indoors or outdoors.

How to Grow Rosmarinus - Planting & Caring

Growing Easiness

Is it easy to grow Rosmarinus plant? Common ly known as rosemary, Rosmarinus officinalis is a woody, perennial herb with fragrant, evergreen, needle-like leaves and white, pink, purple, or blue flowers, native to the Mediterranean region. Despite its origin, rosemary can grow quite well indoors if given the right environment and care.

Plant Size

How big can it be? Since Rosmarinus plants can grow up to 45 cm high, they require regular pruning in order to maintain their size. Without consistent pruning, the plant will continue to grow and may eventually become too large for the space it is in. Rosmarinus plants are typically a deep green color and have small, blue flowers that bloom throughout the year.

Growth Rate

How fast is the growth? If you want a plant that will grow quickly and provide you with a lot of greenery, then the Rosmarinus plant is a good choice. This plant can grow up to 20 centimeters per season, making it a fast-growing plant. Rosmarinus plants are also known for being hardy, so they can withstand harsh conditions.

Rosmarinus Basic Knowledge

Plant Form Bush
Family Lamiaceae
Origin Mediterranean, Europe

Lifespan, Perennial or Annuals

How long is the lifespan? Although Rosmarinus is technically a perennial, it is not frost-hardy and is usually grown as an annual in cooler climates, or overwintered indoors. In warm, frost-free climates, it will remain evergreen and bloom almost year-round.

Ideal Temperature

What is the ideal temperature? Because it is a plant that comes from a warm climate, it is best to give him a warm room. In the summer the temperature of the room in which the rosemary is located, should be in the range of + 73,4-77 ??° F. In winter, the temperature is desirable + 42,8-59 ° F.


What about the humidity? When it's summer the Rosmarinus plant can tolerate the average humidity that is in the room. However, when it's winter and the heating is on, the rosemary should be placed on a pallet with wet claydite to help the plant survive the dry air.

Light Requirement

What amount of light this plant needed? The plant needs bright light for at least 6 hours a day, coming from a south or south-west facing window. It's important to rotate the plant regularly (every 2 days), so that the crown develops evenly. In summer, the plant will need some shading from the strongest sunlight; whilst in winter, it should be in as bright a light as possible. If kept in the shade, the plant will die. When grown under artificial lighting, the light source should be 15 cm above the plant, and the plant should be lit for 14 hours a day.

Soil Composition

What is good soil for Rosmarinus? While this plant does not require a very specific type of soil, there are a few things to keep in mind when choosing or preparing the substrate. First, the soil must be permeable. This can be achieved by mixing equal parts of coarse-grained sand or perlite, turf ground, leaf earth, and peat. Good drainage is also required. Another option is to mix 2 parts of a universal soil mixture from the store with 1 part perlite or sand.

Watering Time

How much I must water Rosmarinus? When its summer, water the plant abundantly. Let the soil dry slightly in between watering. The plant is harmful if the soil dries completely and there is no moisture. If there is too much moisture, the plant's roots will rot and the plant will die quickly. When the soil dries to a depth of 2.5 to 5 cm, water the plant actively. It is especially important to water the plant properly in winter.

Fertilizing and Nutritient

About fertilizer. Unless your Rosmarinus is growing in very rich soil, you'll likely need to give it some fertilizer at some point during the growing season. A general-purpose fertilizer applied once a month at a dilution of half the recommended amount will suffice.


How to reproduce Rosmarinus? Unless a plant is produced by seed, it will not be identical to its parent. Asexual, or vegetative, reproduction is the process by which a plant can produce an offspring that is genetically identical to the parent. This is the method that is used to propagate rosemary. The stem cuttings are taken from the tips of the plant, which is where the new growth is. The cuttings are then rooted in a moist substrate of peat and sand. The key to successful rooting is to keep the substrate moist, but not wet. The cuttings will take root in 3-4 weeks.


Why Rosmarinus won't bloom? Eventually, in April-May, the small blue-violet flowers with a vyemchatoy lip appear.

Transfer or Repotting

How much I must water Rosmarinus? Because Rosmarinus is a plant that can live more than 5 years, every 3-4 years it is necessary to transplant it to a new pot. It is best to use a clay pot because it allows the roots to breathe. The pot should not be too large, because this creates a risk of root rot. When transplanting, it is necessary to change the top layer of the soil.

Caring The Rosmarinus

How to care the plant? The plant needs well drained, sandy soil and full sun. When grown in the room, rosemary needs maximum ventilation in order to avoid the appearance of mildew, especially in winter. Sometimes even use a fan to create air circulation.

Pests & Challenges

What is the challenge when caring Rosmarinus plant? Unless it is looked after carefully, the rosemary at home dies quickly. The main thing - to consider the plant watering. watering should be moderate, and in winter to reduce watering. The second point - the need for rosmarinus of sunlight. The plant prefers a lot of light, so it is better to put it on the windowsill. South side. And in the winter, when there is not enough light, you need to use additional lighting. also, the plant is susceptible to powdery mildew.

Toxic & Poisonous Type

Are Rosmarinus poisonous? Common ly known as Rosemary, Rosmarinus is a popular herb used in cooking. The plant is also said to have medicinal properties. However, it is important to note that the plant is toxic to animals and humans if consumed in large quantities. Symptoms of toxicity include vomiting, diarrhea, and seizures. In severe cases, it can lead to death. If you suspect that your pet has consumed Rosmarinus, it is important to seek veterinary help immediately.