The correct answer is: Rose.
Roses are the most popular flower in the world, and they are also the most cultivated flower in Haryana. In 2019, the area under rose cultivation in Haryana was 12,000 hectares, which is more than double the area under cultivation of any other flower.
Gladiolus is the second most popular flower in Haryana, and it is cultivated on an area of 6,000 hectares. Lily is the third most popular flower, and it is cultivated on an area of 4,000 hectares. Tuber rose is the least popular flower, and it is cultivated on an area of 2,000 hectares.
The main reason for the popularity of roses in Haryana is that they are a very versatile flower. They can be used in a variety of ways, including as cut flowers, as potted plants, and as landscape plants. Roses are also a very profitable crop, and they can generate a good income for farmers.
The main challenges facing rose cultivation in Haryana are pests and diseases. The most common pests that attack roses are aphids, mealybugs, and spider mites. The most common diseases that attack roses are black spot, powdery mildew, and rust.
The government of Haryana is taking a number of steps to promote rose cultivation in the state. These steps include providing subsidies to farmers who cultivate roses, providing training to farmers on how to cultivate roses, and setting up research centers to develop new varieties of roses that are resistant to pests and diseases.