The National Trust's report Space to Grow: Why People Need Gardens shows that more than 70% of people believe spending time in the garden is important for quality of life.
A total of 80% of people believe children should learn about gardening at school.
The National Trust report looks at the work of the organisation, as well as highlighting the benefits of gardening to physical and mental health, employment opportunities and even people's love lives.
One in three members of the public considers gardens romantic places that can give their love life a boost, according to the survey.
Alan Titchmarsh said: "I am delighted that the National Trust has produced this report to highlight how gardens and gardening can benefit everyone in society, regardless of age, background or circumstance. The message is clear — if you want to feel better get out into a garden. Never has access to a garden been more important for our spiritual and physical well-being than it is in today's rapidly changing landscape."
National Trust director general Fiona Reynolds added: "There is still a lack of awareness of the vast opportunities gardens can offer society, which is why we've published this report to highlight just how important they are."
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