NJ Lawns Community

I've been battling my backyard in Hackensack for three years now and I'm ready to give up. The area gets maybe 2 hours of direct sun in the middle of the day, and the rest is full shade from these massive oaks my neighbor won't trim. The soil is pure clay - I mean concrete when wet, dust when dry. Last spring I did core aeration, threw down some Kentucky Bluegrass seed, and watered religiously. NOTHING came up. I'm talking maybe 5% germination. Has anyone successfully grown grass in conditions like this? I'm desperate.

KBG is probably the worst choice for that situation, honestly. That stuff needs full sun and amendment heavy soil to thrive. You wasted your money. For clay + shade you need tall fescue - it's the most shade-tolerant cool season grass we can grow here. Also, aeration alone won't fix clay. You need organic matter worked in over time. Try a 2-3 inch layer of compost this fall and till it in, then plant fescue. Black Kow or cow manure from a local farm works great. Stop fighting nature and work WITH it.

I hear your frustration - I had similar issues in Ridgewood. Here's what actually worked for me: First, get a soil test done through Rutgerscoop extension - it's like $15 and tells you exactly what you're working with. Second, get those oaks trimmed! Two hours isn't enough for any cool season grass. Consider a shade grass mix with creeping red fescue. Third, compaction issues - try a different approach than aeration. Heavy clay responds better to topdressing rather than tilling. Apply a half inch of quality topsoil mix every year for a few seasons and let earthworms do the work.

Thanks both. I should clarify - the 2 hours is being generous honestly, maybe less. The oak trimmings would be a whole other neighbor battle lol. Never got a soil test, just assumed it was pH issue from some online reading. When is the right time to amend and plant here? I know fall is ideal but is it too late to start now? And how much compost are we talking about - I've seen recommendations all over the place.

Don't waste your time seeding NOW in September - you'd be competing with crabgrass and weeds going into winter anyway. For Bergen County, your prime window is late August thru mid-September for fall overseeding. Use that time between now and then to get that compost down and address the drainage issues. Honestly? Given your compact soil AND shade, you might want to consider a groundcover instead of grass entirely. Pachysandra or ivy won't have the same 'lawn' appeal but will actually survive back there.

+1 on waiting for fall planting window. As for quantity - I'm a fan of the no-till approach honestly. Just spread an inch of screened compost over the area (get it from Highland Farms in Saddle River or Woodhall's in Park Ridge - both carry good quality stuff) and let it sit. The worms and rain will work it in naturally over a few months. Don't overthink quantity. You want to BUILD SOIL, not just amend. And honestly I'm gonna disagree with the groundcover take - this IS a lawn situation, they shouldn't give up on grass without trying fescue first. Way different maintenance needs long term.