Read the passage below and answer the question or follow the instruction: How important are seasonal migrant workers for the production of asparagus in the UK?

Passage: ROSS-ON-WYE, England (Reuters) - For almost 100 years, Chris Chinn’s family has farmed asparagus in the rolling hills of the Wye Valley in western England.
This year, he fears uncertainty around Britain’s departure from the European Union will keep his eastern European workers away and the asparagus will stay in the ground.
Asparagus grown in Britain is feted by chefs as among the world’s best but the seasonal worker shortage threatens the country’s asparagus industry and the viability of Chinn’s Cobrey Farms business.
At Chinn’s farm, which turns over more than 10 million pounds a year, the workers pick the premium asparagus spears that can grow up to 20 cm a day by hand. Sometimes they pick them twice a day before dispatching them to customers such as Marks and Spencer and Britain’s biggest supermarket, Tesco.
“It is incredibly clear cut - there is no UK asparagus on your supermarket shelves without seasonal migrant workers,” Chinn, whose great grandfather started as a tenant farmer in 1925, told Reuters.
Britain’s asparagus season is short and early - traditionally running from April 23, known as Saint George’s Day, to Midsummer’s Day in mid-June. It will be the first big test of the 2019 seasonal labour crisis.
This year Chinn’s team has had to work much harder to recruit Romanians and Bulgarians who are perplexed by the long Brexit process as Prime Minister Theresa May seeks parliament’s approval for a divorce deal with the EU. They are also wary of the welcome they will receive from Britons, who voted in 2016 to leave the EU.
Chinn’s concern grew after 20 of the 100 or so workers due to help cultivate the crops in January failed to turn up.
Chinn, who voted Remain in the 2016 Brexit referendum, said uncertainty over eastern Europeans’ employment rights and how long they can stay, combined with a fall in the value of the pound, meant Germany and the Netherlands were now considered more attractive destinations.
“They go somewhere which is most straightforward and any, even minor, hurdles you put in their way is just nudging them ever closer to going somewhere else,” he said.
With just 11 days to go until Britain is due to leave the EU, the government is yet to agree a withdrawal arrangement or an extension, meaning the risk of a disorderly “no-deal” Brexit cannot be ruled out.
Elina Kostadinova, a 28 year-old harvest manager at Cobrey Farms who is from Varna on Bulgaria’s Black Sea, said many workers were worried about coming to Britain because of Brexit.
Britain’s fruit and vegetable sector relies on up to 80,000 seasonal workers from the EU each year. Having previously been inundated with applications, labour agencies say interest dropped off in 2017 and 2018 as workers from Romania and Bulgaria opted to go elsewhere in the EU.
“U.K. agriculture is definitely entering into a crisis. No labour means no harvesting, which means no fruit and no vegetables on shelves in British supermarkets,” Chief Executive Stephanie Maurel told Reuters.
This prompt doesn't seem malicious.