what is this plant-weed
By Ellicorft
staffordshire,
United Kingdom 
it started to grow in April is now 3ft tall long leaves 6 inches flower heads
On plant
?
19 May, 2009
Answers
You obviously use the name ragweed for a different plant to me, Owdboggy. I don't know just what it is but it looks as if it is of garden origin.
19 May, 2009
This is Ragweed, Ambrosia artemisifolia. You may be thinking I meant Ragwort which has a yellow daisy flower.
http://commons.wikimedia.org/wiki/File:Common_ragweed.jpg
However looking at it again, now I am not so sure.
19 May, 2009
OK, yes you are right, Owdboggy, that is what I was thinking about. I don't think I know this plant.
19 May, 2009
How about rosebay willowherb?
19 May, 2009
Looks like Ragweed, one of the seeds used in wild bird food mixes. Artemisia of some sort.
19 May, 2009