When I was younger, an old-time arborist I knew used to say “The best time to prune trees is when the tools are sharp.” This guy was beset with shoulder injuries and knee problems because he also believed “What doesn’t kill you makes you stronger. Sadly, both of these old saws are dangerous lies.

I’m not one to shed a tear when authoritarian rulers die, but once they’re gone, outdoor dining becomes a lot more dangerous. As summer wanes, the original queen in every yellowjacket (or other social wasp species) colony dies. Turns out that having a few thousand babies in the course of one season is enough to tire any Queen Mum to death.

Recent studies show that trained dogs can sense Parkinson’s disease, diabetes, many forms of cancer, and other serious ailments long before symptoms show up. We may not be able to match such an impressive feat, but it turns out we’re not entirely inept when it comes to prescient diagnostics. There are two simple ways to detect grave illness in trees before they start looking overtly ill. The catch is that it’s only possible to do this in late summer when leaves start to change color.

Please don’t blame late-season allergies on goldenrod. Well, not unless you’ve discovered bees going up your nose lately. It turns out that pollen from goldenrod, which is in glorious bloom throughout the region right now, is too heavy to waft on the wind. These plants rely on bees and other pollinators to convey their sticky pollen grains from one flower to another, which is why goldenrods don’t cause hay fever, even if they wanted to.