A visitor views and records azalea and rhododendron blossom in Richmond Park, London, Britain, April 30, 2022. REUTERS/Toby Melville 

Visitors record images amongst azalea and rhododendron blossom in Richmond Park, London, Britain, April 30, 2022. REUTERS/Toby Melville 

A visitor views and records azalea and rhododendron blossom in Richmond Park, London, Britain, April 30, 2022. REUTERS/Toby Melville 

Visitors view and record azalea and rhododendron blossom in Richmond Park, London, Britain, April 30, 2022. REUTERS/Toby Melville 

A mandarin duck swims with colours of azalea and rhododendron blossom reflected in the water in Richmond Park, London, Britain, April 30, 2022. REUTERS/Toby Melville 

A visitor views and records azalea and rhododendron blossom in Richmond Park, London, Britain, April 30, 2022. REUTERS/Toby Melville 

Visitors view azalea and rhododendron blossom in Richmond Park, London, Britain, April 30, 2022. REUTERS/Toby Melville 

A visitor views azalea and rhododendron blossom in Richmond Park, London, Britain, April 30, 2022. REUTERS/Toby Melville 

A visitor records images of azalea and rhododendron blossom in Richmond Park, London, Britain, April 30, 2022. REUTERS/Toby Melville 

A dog looks out across a pond with azalea and rhododendron blossom reflected in the water in Richmond Park, London, Britain, April 30, 2022. REUTERS/Toby Melville 

A visitor views azalea and rhododendron blossom in Richmond Park, London, Britain, April 30, 2022. REUTERS/Toby Melville 

A mandarin duck swims with colours of azalea and rhododendron blossom reflected in the water in Richmond Park, London, Britain, April 30, 2022. REUTERS/Toby Melville 

Visitors view azalea and rhododendron blossom in Richmond Park, London, Britain, April 22, 2022. REUTERS/Toby Melville 

A visitor views azalea and rhododendron blossom in Richmond Park, London, Britain, April 22, 2022. REUTERS/Toby Melville 

Visitors view azalea and rhododendron blossom in Richmond Park, London, Britain, April 22, 2022. REUTERS/Toby Melville 

A visitor views azalea and rhododendron blossom in Richmond Park, London, Britain, April 22, 2022. REUTERS/Toby Melville 

A visitor takes images of azalea and rhododendron blossom in Richmond Park, London, Britain, April 22, 2022. REUTERS/Toby Melville 

A mandarin duck is reflected together with azalea and rhododendron blossom as it swims on a pond in Richmond Park, London, Britain, April 22, 2022. REUTERS/Toby Melville 

A visitor walks amongst azalea and rhododendron blossom in Richmond Park, London, Britain, April 22, 2022. REUTERS/Toby Melville TPX IMAGES OF THE DAY 

Mandarin ducks are reflected together with azalea and rhododendron blossom as they swim on a pond in Richmond Park, London, Britain, April 22, 2022. REUTERS/Toby Melville 

Flowers of Rhododendron Daurian are seen during unusually warm weather, warmer 8-14 degrees Celsius as usually be in December according local media, in the Botanical garden in Minsk, Belarus December 26, 2019. REUTERS/Vasily Fedosenko 

Britain's Prince Harry meets workers clearing rhododendrons in Epping Forest near London, March 15, 2017. REUTERS/Kirsty Wigglesworth/Pool 

A blossoming Rhododendron is pictured in the Botanical Garden of the University of Vienna, April 15, 2015. REUTERS/Heinz-Peter Bader 

A combination photo shows blossoming bushes and trees in the Botanical Garden of the University of Vienna, April 15, 2015. (L-R, top down) Forsythia x intermedia, Rhododendron, Pyrus pyrifolia (Nashi Pear), Corylopsis, Prunus avium (Wild Cherry), Parrotiopsis jacquemontiana, Kerria japonica, Pyrus nivalis (Snow Pear), Magnolia x soulangeana (Saucer Magnolia), Mahonia aquifolium (Oregon Grape), Amelanchier canadensis (Sugarplum), Fagus sylvatia (European Beech). REUTERS/Heinz-Peter Bader 

A bumble-bee sits on a rhododendron bloom on a sunny spring day in Dortmund March 28, 2012. REUTERS/Ina Fassbender (GERMANY) 

Belgium's Crown Prince Philippe (R) baptizes a Rhododendron plant as Princess Mathilde holds Princess Eleonore next to Princess Elisabeth (L) and Prince Emmanuel (2nd L) during a visit to an exhibition of flowers and gardens called the "Floralies/Floralien" in Ghent April 15, 2010. The crown prince celebrated his 50th birthday today. REUTERS/Francois Lenoir (BELGIUM - Tags: ANNIVERSARY ROYALS) 

Belgium's Crown Prince Philippe (R) baptizes a Rhododendron plant as Princess Mathilde holds Princess Eleonore (L) and Princess Elisabeth (2nd L) next to Prince Emmanuel during a visit to an exhibition of flowers and gardens called the "Floralies/Floralien" in Ghent April 15, 2010. The crown prince celebrated his 50th birthday today. REUTERS/Francois Lenoir (BELGIUM - Tags: ANNIVERSARY ROYALS) 

A girl walks through flowering Azaleas and Rhododendrons in the Isabella Plantation in Richmond Park, south-west London May 8, 2009. REUTERS/Stephen Hird (BRITAIN SOCIETY ENVIRONMENT) 

Ducks swim in a pond surrounded by flowering Azaleas and Rhododendron in the Isabella Plantation in Richmond Park, south-west London May 8, 2009. REUTERS/Stephen Hird (BRITAIN ENVIRONMENT ANIMALS) 

A woman pushes a pram by flowering Azaleas and Rhododendron in the Isabella Plantation in Richmond Park, south-west London May 8, 2009. REUTERS/Stephen Hird (BRITAIN SOCIETY ENVIRONMENT IMAGES OF THE DAY) 

A duck stands next to a pond surrounded by flowering Azaleas and Rhododendron in the Isabella Plantation in Richmond Park, south-west London May 8, 2009. REUTERS/Stephen Hird (BRITAIN ENVIRONMENT ANIMALS) 

A droplet of water falls from the icy coating on a rhododendron leaf from a winter storm in Wilmington, Delaware, January 28, 2009 REUTERS/Tim Shaffer (UNITED STATES) 

Nepali girls give the Maoist salute as they hold rhododendrons, the country's national flower, during celebrations for the tenth anniversary of the rebel uprising in the village of Tila in the Rolpa district, heartland of Maoist insurgents in Western Nepal on February 13, 2006. Nepal's King Gyanendra will ultimately be exiled or executed because he has closed the door to any political compromise since seizing absolute power a year ago, the reclusive leader of the country's Maoist rebels said on Monday. Picture taken on February 13, 2006. REUTERS/Desmond Boylan 

Nepali girls give the Maoist salute as they hold rhododendrons, the country's national flower, during celebrations for the tenth anniversary of the rebel uprising in the village of Tila in the Rolpa district, heartland of Maoist insurgents in Western Nepal on February 13, 2006. Nepal's King Gyanendra will ultimately be exiled or executed because he has closed the door to any political compromise since seizing absolute power a year ago, the reclusive leader of the country's Maoist rebels said on Monday. Picture taken on February 13, 2006. REUTERS/Desmond Boylan 

Buddhist flags flutter in the wind on a hill near Thimphu, capital of
Bhutan. Each year, barely 7,000 foreign tourists walk through Bhutan's
spectacular forests covered with conifers, rhododendrons. The Bhutan
government first threw open the country to tourists in 1974 to tap the
infrastructure created for the king's coronation. But it has kept
backpackers from tramping across the reclusive country by charging a
flat $200 a day per visitor. Picture taken August 21, 2003. TO MATCH
FEATURE BHUTAN-TOURISM. REUTERS/Kamal Kishore

PK/RCS