If you want to know how to get a green lawn quick, I've got one word for you. Sod!
Oh wait. I suspect that wasn't what you had in mind when pondering how to get a green lawn quick now was it? You're talking an established lawn that you want to green up quickly.
Ride On Mower
Just as an aside, proper mowing can prevent common problems many have with their lawn. Problems that cause them to desperately seek solutions and ideas such as how to get a green lawn that don't involve paint.
Now some turf experts recommend fertilizing your lawn just once a year - in the fall. But if you want to know how to get a green lawn quick, well then spring feeding is just the ticket.
Just so you know however, this lawn care tactic promotes blade growth at the expense of root growth. Sure it creates a thick, lush, green carpet in the short run. But problem is, it leaves your grass exposed. With no way to tap any deeper moisture available during the droughts that can hit any time during the summer. (Then too a deeply rooted lawn requires less water, does tolerate drought better and uses any fertilizer you apply more efficiently.) But that IS how to get a green lawn quick though. Don't you agree?
While we're at it let's discuss another likely problem standing between you and a greener lawn. Over watering during persistent dry spells. If you're guilty of doing that, you're leaching valuable nutrients from the soil. Leaving your grass starved for the food it needs to keep it a peak green. And leaving you seeking yet another solution that can answer your quest for how to get a green lawn.
Finally here's one last tip for greener grass. Quick or not. It's for the grass you've got under those glorious trees of yours that may be struggling to stay green too. First you need the right type of grass growing there. One that can hold its own in the shade. Assuming you've got that then have a soil test done. Your local county extension service will likely be able to make suggestions based on that test to help you keep your shaded lawn in the green too.