Introduction:

Salvia rosmarinus is a perennial, evergreen, aromatic and medicinal herb that is grown both in the indoor and outdoor garden. It belongs to the mint family called Lamiaceae. It is evolutionary and naturally adapted to sandy, stony, and well-drained dry soils. It is native to the Mediterranean region.

It is a perennial herb with sticky needle-shaped leaves with small flowers of varying colors. There are 24 total cultivars of rosemary with flowers ranging from white to yellow and yellow to pink. Unlike other mint family herbs, rosemary needs lots and lots of sunshine for proper growth and development. 

Majorca Pink, Tuscan Blue, Huntington Carpet, and Golden Rain are some of the most widely grown rosemary varieties all over the world.

The first section of this article will elucidate how to grow rosemary in the garden. The second section is predefined for major factors affecting growth and development in the rosemary. The third section explains flowering in rosemary and the importance of rosemary in our daily diet. Last but not least the last section is all about frequently asked questions.  

How to grow rosemary in the garden?

Rosemary is grown both in an indoor and outdoor garden. Pot plating is also an important form of growing rosemary. The following points are crucial to follow when you consider growing rosemary in the garden:

Follow all the above-mentioned guidelines for growing the rosemary in the garden.   

Causes of the rosemary turning black in the garden

When you grow the rosemary in the garden you probably have seen the herb turning black. Various factors play their key role in turning the rosemary black. 

The factors which cause the herb to turn black in the garden are as follow:

Over-watering: 

Over-watering is the first and most prominent factor which turns the rosemary black in the garden. It leads to the development of various fungal infections such as leaf fungal spots and root rot etc. Rosemary adores dry soil and avoids wet soils. So water the herb every 2 to 3 weeks during the hot summer season and avoid watering the herb during the cool rainy season and in winter.

Slow-draining soils: 

Rosemary is naturally and evolutionarily adapted to the high-draining soils of the Mediterranean Region. It needs sandy, stony, and high draining soils to thrive and grow. When you grow in wet and clayey soils it leads to root rot and fungal infection. So, good gardening practice involves growing the herb in well-draining soils such as sandy and stony soils.

High and frequent rainfall:

The third most probable cause of the rosemary turning black in the garden is high and frequent rainfall. Rainfall makes the soil wet and as the result turns the rosemary black.

High Humidity:

High humidity is another factor that has a direct relation with rosemary turning black in the garden. Rosemary herb is adapted to environments where it receives lots and lots of sunshine with dry soils and low humidity. The following factors influence high humidity:

Insects: 

Insects such as spiders, mites, whiteflies, thrips, and mealybugs are major insects’ pests of the rosemary herb. They infect the herb and spread many diseases. They usually leave behind honeydew and other substances which lead to the formation of molds. Good gardening practice involves checking for the presence of the abovementioned insects. If found prune the foliage and stems and throw them away or apply insecticide instead. 

Low light: 

 As mentioned earlier rosemary herb adores growing in areas that receive lots and lots of sunshine during the day. The growth and performance of the herb drastically reduce in shady areas. So, grow the rosemary herb in such a spot in the garden where it receives lots and lots of sunshine. 

How to avoid the rosemary turning black

To avoid the rosemary turning black in the garden consider the following major points:

Medicinal Importance of the herb

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Frequently Asked Questions (FAQs)

Why is my rosemary turning black?

The rosemary in the garden turns black because of overwatering, overhead watering, slow-draining soils, high and frequent rainfall, high humidity, insects, and low light. These factors when left unchecked leads to the development of black rosemary with black fungal spots.

How to prune rosemary in pots and bushes? 

To prune the rosemary in the garden follow the following guidelines:

Does rosemary go dormant?

As mentioned in the introductory section rosemary is an evergreen perennial plant but it goes under dormant phase during the winter season where its growth and development reduces to almost zero. The dormant phase of rosemary ends with the arrival of the spring season. 

What is rosemary good for?

Rosemary is loaded with vitamins, proteins, minerals, anti-inflammatory compounds, and antioxidants which play a huge role in boosting and maintaining our immune system. This herb is also good for good and balanced blood circulation in our bodies. 

What is the best season to cut or prune the rosemary?

According to gardeners and horticulturists, the best season to prune or cut the rosemary herb is late spring and early summer. Pruning is one of the most reliable methods to boost its growth and maintain its bushy appearance in the garden.

Does rosemary sustain frost conditions?

The minimum temperature for optimal growth and development of rosemary is 30 degrees Fahrenheit. Below this temperature rosemary growth and development gets halted. Thus, rosemary cannot sustain in frost conditions. If the weather conditions in the outside garden are too cold or too freezing then it is advised to bring it to inside the house until the frost conditions are over.