A couple from Liverpool have grown grapes the size of 'small ping pong balls' from their conservatory.John Minnion, 77, and his wife, Sandra, 68, have been growing the fruit in the UK since the 1990s - and have this year gotten their biggest ever batch.A stunning thick vine wraps itself around the ceiling - starting from a tiny hole in the window frame - and the pair will soon turn the latest harvest into jam. It's held up by almost invisible fishing wire, and is covered in hundreds of grapes. They believe that the impressive growth this year is down to the summer's hot spells.'We sit in there with the grape vine, but you've got to be careful you don't hit your head,' John, a retired artist, shared.'They don't all ripen at once. You pick one that's a bit softer and lighter in colour, but as they ripen any shaking when you pick them causes one or two of the grapes to fall off.'There's a danger when you sit down you will land onto a squashed grape.' A couple from Liverpool have grown grapes the size of 'small ping pong balls' from their conservatory A stunning thick vine wraps itself around the ceiling - from a tiny hole in the window frame - and the pair will soon turn the latest harvest into jamHe admitted that 'the hardest part is getting the small vine to survive through the hole in the wall, sometimes it dies'.'You have to feed it through and hope it survives,' John shared. 'It did after the third time, and now it's growing strong.'John and Sandra, a GP, originally grew grapes in their London conservatory before moving to Liverpool in 2000 and continuing the tradition.The grapes were initially modest in size but have grown larger as the vine has become more established, with this year's fruit proving particularly impressive.Horticulturist Shimmy Eden, 31, from Liverpool, has been helping the couple take care of the crop.She has been left stunned by the size of this year's fruit and says the hot weather is likely behind it.'There was a big surprise for grapes growing in Liverpool - you'd think France or Italy,' she shared. They believe that the impressive growth this year is down to the summer's hot spells The grapes were initially modest in size but have grown larger as the vine has become more established, with this year's fruit proving particularly impressive John Minnion, 77, and his wife, Sandra, 68, have been growing the fruit in the UK since the 1990s - and have this year gotten their biggest ever batch'But the climate change and having a hot and dry summer is probably contributing to how big the fruits are growing, and maybe it is something we will see more of in the future.'Last year they did fruit up but they didn't get to the size these are - they are absolutely massive. It really has gone crazy this year.'They're the size of a small ping pong ball.'The expert shared that as well as the right weather, to grow well a grapevine needs the right setting. 'Usually the climate is an issue, you need full sunlight and a lot of places gardens don't have the space,' she added.'But there are tricks, so growing up the sides of walls - we use fishing wire to hold ours up so you can't see the wire.'The soil is also so important - the quality. You need a high iron-based fertiliser, making sure you keep on top of them and notice if things are watered enough.'The vine is expected to continue producing fruit into September.John believes the success of the vine could be a sign of how people will have to adapt their gardens as the climate changes.'People should try and grow whatever they can and as much as possible as a general principle - grapes are just the ones that work for me,' he explained.'I grew up in the 50s where there was the war attitude of you want things, you grow it and you are expected to.'I should grow much more, but with this changing climate your best bet is grapes, for growing anything else it's been a bit lousy.'