Late February and early March is when plucking begins for the prime first flush of Darjeeling. But months of extremely dry weather this winter, followed by heavy rainfall in March, has made the harvest difficult this year, with the taste the region is famous for increasingly at risk as quality dips.
https://www.cbc.ca/news/world/darjeeling-tea-india-drought-rain-climate-change-9.7152129
https://www.cbc.ca/news/world/darjeeling-tea-india-drought-rain-climate-change-9.7152129

Drought and erratic rains are threatening the flavour — and future — of India's prized Darjeeling tea | CBC News
An extremely dry winter has made for another challenging harvest of India's famous Darjeeling tea, with the flavour the region is renowned for at risk as quality dips. As climate change makes the weather more erratic in the Himalayan foothills, estate owners are growing ever more worried about the future of their businesses.