How to clean aged dirty walkway and porch?

Buy WET and Forget at Depoe or Lowes. We use it in Fl. on the walks and roofs. It does not hurt the plant life. Honest!

Here is an article with natural products (and no chemicals) to do the job.

https://homeguides.sfgate.com/clean-concrete-pathway-harming-surrounding-grass-35649.html

You can rent a power washer from a big box store or maybe your local hardware store. You don't necessarily have to use chemicals if you do that.

Agree with Becky - in fact, just spent the past week pressure washing all the concrete at my mother's house with just water and it looks so fresh and new. The only stains that would not come out were rust, but possibly had I treated them with something I could have removed them as well. Just wasn't important to us.

Stain Solvers oxygen bleach is safe to use around plants. Check out the video here: https://www.stainsolver.com/?s=concrete+cleaning

It's available directly from the web site or from Amazon. It isn't cheap, but it is easy to use and effective.

Yes, rent a pressure washer and be done with it! It will save you a lot of elbow grease and get the job done right.

Just be careful with pressure washer if you have any loose mortar ,maybe start at lower pressure to test it out .