Half of Brits are unaware everyday vegetables like courgettes, cucumbers and aubergines can be grown on British soil.
A poll of 2,000 adults found staple ingredients including peppers, sweet potatoes and runner beans were often assumed to only be grown overseas.
Blueberries and cherries were also commonly thought to always be imported.
The research also found 43 per cent of people are not confident identifying what is in season at different times of the year.
As a result, mealtimes have fallen into a familiar rhythm, with dishes like pizza, fish and chips and spaghetti bolognese among the meals most cooked on repeat.
Almost half (47 per cent) admitted they tend to cook the same meals throughout the year.
With eight in ten adults saying supporting British or local farmers is important to them, although only 27 per cent actively consider whether fruit and vegetables are UK-grown when shopping.
Despite this, 68 per cent agree that fruit and veg tastes better when enjoyed in season - with strawberries standing out as a prime example.
Gen Z appears to be the most in tune with seasonal eating, feeling more confident about which foods are in season compared to older generations.
The study was commissioned by Aldi, which has teamed up with farmer and TV personality Harriet Cowan to celebrate the benefits of buying British-grown fruit and veg while championing the farmers behind it.
Harriet selected a series of seasonal recipes using British-grown produce to spotlight the fruit and vegetables from the UK [https://www.aldi.co.uk/harrietcowan].
Harriet Cowan said: “I’m passionate about highlighting the brilliant work British farmers do to bring high-quality food to our tables.
“I’ve loved teaming up with Aldi to learn more about the fruit and veg we grow here in the UK and to shine a light on what’s in season.
“When you choose British produce, you’re supporting farmers who work in all weathers and are closely connected to the land and the seasons. That really matters.”
The research also found when deciding what to buy, cost remains the biggest driver (56 per cent), alongside supermarket deals (46 per cent).
Followed by nutritional value and health (49 per cent) and convenience (36 per cent) according to the One Poll figures.
Habit also plays a major role in shoppers’ decisions, with half (50 per cent) saying they only typically buy the foods they regularly eat, according to the OnePoll.com figures.
Julie Ashfield, chief commercial officer for Aldi, which is committing more than £5 billion to long-term agreements with British suppliers and aiming to source 50 per cent of it domestic produce through these by the end of 2027, added: “With so much food available year-round today, it’s understandable that many people reach for the same staples and assume certain fruit and veg must be imported.
"But plenty of those everyday ingredients can be grown here in the UK.
“We know shoppers care about backing British farmers, and shopping more seasonally can be an easy way to bring more variety to mealtimes while supporting British growers.
“That’s why it’s so important to continue investing in British suppliers and making seasonal produce more visible and accessible for customers”
TOP 10 FRUIT AND VEG BRITS DIDN'T KNOW WERE GROWN IN THE UK:
1. Kiwi
2. Aubergine
3. Peppers
4. Sweet potatoes
5. Sweetcorn
6. Blueberries
7. Cherries
8. Courgettes
9. Asparagus
10. Cucumber
