Weed n' Feed

[Minimammoth]

Just put this on my loosely termed 'lawn'. Then realised that the majority of this green area is: plantain, moss, daisy,clover, dandelion, etc. anybody know what happens next. Will I be left with a wasteland and unable to reseed for ages.

Well, I bought a box of WEED AND FEED years ago but afterwards the weeds just grew back
Then YEARS LATER I found it, opened and slightly damp, and used it again this year to get rid of spreading daisy patches, it worked, but the grass that was affected grows now rampantly and is much longer than the untreated grass - so a mixed blessing really, as are most remedies !!

ps. I did not need to reseed this time but is in a damper and shadier part of the garden than the other lawn

The reseeded bits are doing well. Still have some bald patches, the plantain has definitely gone but the dandelions are hanging on. I wonder if I should do them, with some other weed killer? Grass is lush.