hundreds of saplings(?) in my lawn
hi hope you are all well, and thanks in advance for your help.
I'm a complete newby to gardening, so please be gentle.
We bought a new house last year with a reasonable garden. earlier this year/ late last year, we had lots of little helicopter type seeds from a large tree in our neighbours garden land all over our garden. i didn't do anything about them...now i have hundred of little saplings growing in my lawn and id like to get rid of them...(i'll know now for next year to hoover them up....).
ive tried weedkilling lawn feed / lawn grower (evergreen complete 4 in 1) this stuff here https://www.wyevalegardencentres.co.uk/shop/evergreen-complete-lawn-care-4-in-1-200m2-0800002545/
but it doesn't seem to have touched them (it has killed a lot of moss already though, there's a lot of black moss patches now)
i only spread this on Saturday (2 days ago), so maybe i haven't given it enough time...however, if they remain untouched, what can i do? the pictures of the saplings and the seeds and the tree they came from are attached.
ive bought an electric scarifer but haven't used it yet, as i was going to wait a few days for the moss to die, but maybe this will help?
i could also just pull them all out by hand, but i wondered if this would actually get rid of them permanently.
I would be very grateful for your advice, thanks again,