Annual Bluegrass

I have a recent seeded lawn (8 weeks) and annual bluegrass is already creeping in. Also have some bare patches (see attached) that I have topped up with fresh grass seed and plenty of water (twice a day during this dry spell). I have also mowed and keep it to once a week currently. Is bluegrass pretty common? And any advice on how best to bulk up the lawn / patchy areas?

 

Just keep reseeding the patches. It probably wouldn't hurt to wait until Sept. then scarify, scratch, the whole lawn then reseed. You will not have to worry about watering it so much, put a bit of extra seed mixed with top soil where the patches are. Put your mower on its highest setting now to mow for the rest of this summer. The lawn will probably look lumpy and scruffy but by next year the patches should have disappeared.

 

Thanks @Goldenlily26 for the reply. I didn't consider scarify later in year, could you also do this in April / May timeframe? The only problem with seeding is the pigeons like it too much so in the meantime I will perhaps apply a thin layer of top soil to try and prevent this.

 

I had to look up annual bluegrass. Turns out, it's another name for annual meadow grass (Poa annua) in case anyone else is wondering.

 

It is possible to seed earlier in the year but you will need to water constantly to keep the seed growing. The weather is usually much wetter later so no need to water. Birds are always a problem with seeding, that is why it is recommended to sow thickly. However a thin layer of sieved topsoil would also help.