Leveling patio blocks and preventing weeds in seams without herbicides

[Kimstu]

@What_Exit

This thread is about leveling patio blocks, not about herbicides.

Take it to another thread!

And I split it off

I will repost the bulk of my remarks from this post in the split-off thread, since they had nothing to do with herbicide application:

You can also periodically douse the cracks with boiling water, but nothing will totally prevent weed growth. Weeds are just the name we give to pioneer and other exceptionally hardy plant species that evolved to take advantage of precisely these sorts of inhospitable conditions. […]

The OP’s best strategy IMHO is to set out patio chairs that are low enough that the people sitting in them can just tweak out little sproutlings from the cracks and throw them into the firepit. You’d be surprised at how easy it is to keep a small paved area weed-free if you just get into the habit of plucking out the inevitable few bits of new growth at regular intervals.