Posted: 23/09/2014 at 15:47
hi Kate. I have the same problem... new house, with lawn full of weeds. I don't think it was weeded properly before the turf was put down. Also we are surrounded by fields so the seed heads must blow in.
ive tried the granula weed and feed too, and whilst it's good on the big weeds it doesn't seem to tackle the infants. I also tried spraying directly with glyphosate which works but it also kills the grass around the weed.
my most recent attempt has been to water in a solunable weed killer. I was told by the chap at the garden centre that it makes the weeds grow madly and they sort of strangle themselves and the first cut afterwards with the lawn mower is a fatal beheading! this was three weeks ago. They did grow like mad, and we cut the lawn yesterday. looks ok but I can still see lots of weeds.
perhaps autumn isn't the best time to do this. Most products tend to say spring. If you do find something that works please let me know!