Here is another plant that came up in my garden which I don't know what it is and is it invasive? Thanks Marie
It's Petasites japonicus, AKA Giant Butterbur, Bog Rhubard, or Fuki. If you have the species form, it will spread aggressively and take over a fairly large area. If it's 'giganteus', a giant leafed form, it is far less aggressive, but still somewhat spread-y. Comparing it to the other plants in the picture, it's look, and given it's only coming up in one spot, it's likely yours is a giganteus (and so less aggressive)...if so, it will eventually form giant leaves around 4' wide. I'd keep an eye on it, and pull it if it's spreading too much: it runs close to the surface, and is easy to remove, though small root pieces will re-sprout and you need to be diligent. Leaf stalks are prepared as a vegetable in Japan.
Thanks for the info. I checked some pictures on the internet and it looks a lot like butterbur. I think I should get rid of it before it spreads. Although I must say the size of the leave are pretty neat.