By Whoopsadaisy
Hampshire,
United Kingdom 
Good evening. My sister has this plant growing in her garden and she thinks it's a cheese plant. I'm pretty sure it's not so can you please tell me what it is .
12 Jul, 2015
Answers
certainly not cheese plant. does looks like hog weed
13 Jul, 2015
I'd say hogweed too. Nasty stuff.
13 Jul, 2015
Definitely giant hogweed, Heracleum mantegazzianum, and definitely as bad as everyone says.
14 Jul, 2015
That looks like giant hogweed, Heracleum mantegazzianum, to me if it is your sister needs to stay well clear of it right now. Next year as soon as it starts to grow spray with Roundup, more than once if necessary as this is an non-native invasive. Copy and paste RHS link to info on below
https://www.rhs.org.uk/advice/profile?PID=458
Do not let anyone touch any part of the plant at this time of year unless they are wearing a thick long sleeved top and industrial strength rubber gauntlets! Copy and paste link below to see how nasty this plant is
http://www.bbc.co.uk/news/uk-england-manchester-33474810
Our son, as a teenager, tried to pull some up with his bare hands and they became extremely badly blistered. Vitamin E oil was the only thing that help but, in this case prevention is better than cure!
Don't let it seed! Once it has finished flowering you, or rather your sister, need to remove every last flowerhead and put into a plastic sack and dispose of in the rubbish bin - not the recycling. Remember though to take care not to let the lease touch your bare skin.
12 Jul, 2015