For the gardener - a 5 litre pressure spray and a bottle of the cheap Chinese equivalent of Roundup (Glyphosate). No gardener should be without it.
In fact I am just about to go out and spray along the fence line right now.
Personally I rarely buy plants, I take cuttings on my daily walks. I like succulents as they are very hard to kill in my Darwinian garden and sticking them in soil basically makes them grow.
When I had a garden one of my favourite gadgets was a butane gas weed burner. I suppose if I’m honest it was probably more toy than gadget but there was something quite relaxing, almost therapeutic about using it.
There are various models available on Amazon at a decent price. Mine was quite useful for lighting barbeques too.
Now that weedkiller sprays have (rightly) had the toxic chemicals taken out the only answer to keeping gravel paths clear are the gas burners.
Mine is very useful for making the melted sugar on top of crème brulees. Very quickly.
These 10cm battery chain saws are excellent if you’ve lots of trees and shrubs. They even go through larger pieces of wood - so great for getting smaller bits of wood when I’m lighting the pizza oven.
Long while ago you posted about the Wolf Garden Tools. I have had mine for near on 8 years and use them every time doing a gardening job…The Hoe to the Fruit Picker even the small fork and spade I use on the detachable handles…I have the two length poles and that seems to cover all manuel jobs…Love the set and could not do without them now…