British growers say the sunny spring weather in the UK provides “perfect” conditions to produce strawberries that are so large “can’t keep them in your mouth”.

With nearly 20 years of experience, Bartosz Pinkosz, operations director at Summer Berry, “never seen anything like that.” Strawberries this month are harvested by leading growers this month due to many sunny and cool nights.

"We have had the darkest January and February since the 1970s, but the brightest parades and April since 1910," he said. "Starting March, this is really perfect for tunnel strawberries. The berries are greater than 10 to 20 percent."

All the major retailers have sold berries grown on the company’s farm in Colworth, and although the size varies, Pinkosz says its strawberry plant is producing “giant” 50g berries that you “can’t fit into your mouth.” However, the average is 30 grams more modest.

Nick Marston, chairman of the UK berry growers industry group, confirmed Strawberry lovers’ (Fruit) Salad Day. "We see the size, shape, appearance, and most importantly, the taste and sugar content are very good, which is what consumers want when buying British strawberries," he said.

He added: "I always say that strawberries are 20% larger because the average involves some crops will be slightly smaller than others. But I think it's arguably good sunshine, cool overnight temperatures, are ideal for fruit development."

Large swaths of berries in the summer Berry Company tunnel are “tastier and stronger” because the cooler nights allow the fruit to slowly ripen. “The fruit develops slowly, the more time it takes to expand the cells and create larger berries. What we are seeing now is something I have never seen in 19 years, and it is always the larger berries.

"For us, it's the perfect start to the strawberry season...I've really never seen the harvest consistently produce such a large berries. Some people are already super-sized - growing to the size of plums or even kiwi fruit."

The sunny, very dry spring in May, the warmest spring begins, offering early strawberries, aubergines and tomatoes in early May. But as dry conditions continue, fears Britain will head to a drought this summer.

Marston said the specter of water shortage will attract attention, especially for growers in southeast England. However, he said the berries were grown with drip irrigation, so water was rarely used.

As Wimbledon approaches next month, tennis fans can be reduced by wet and dark conditions last year’s growing time, sending it to juicy strawberries for the second consecutive year.