Sorry if this thread repeats itself. Typed it already and then lost it. My fault not the site.
Last year I sowed a packet of seeds labelled as 'Fast flowers' - supposedly would grow and flower in 6-weeks. Sowed them in a few small pots, stood them in a row and a mixture of cornflowers and tall white flowers came up which look similar to white alyssum. Left the pots outside and the last few weeks the tall white alyssum looking flowers have come up again and these yellow flowers. They are perfumed and about 15"/35cm high. Will have to stake them as blowing a gale now but - are they a garden flower, a wildflower or a weed? They sort of resemble wallflower and the perfume is lovely. The stems are soft at this point and mis-shapen because I didn't notice them until the yellow flowers appeared. Can anyone tell me what they are? Many thanks.