My neighbour who’s a landscaper swears by Blaklader. Expensive, but they’re Canadian made (at least the ones he has are) and seem to last quite a while. He’s got two pairs that he’s been rotating for the past couple years and they’re still going strong.

https://www.blaklader.ca/en/all-products/men/pants

Also, the friggen pockets are amazing. There’s tonnes of usable space.

Personally, I’ve used Duluth Firehose pants for the past couple years on the farm but they get pretty warm, and are pretty thick for summer wear.