Is there something about rain?
B3 Posts: 25,280
A little rain makes a lot more difference to the growth of plants than a good hosing. Is there something in or missing from the rain or is it that a larger soil area around a plant gets soaked?
In London. Keen but lazy.
we have some very large lime trees nearby and a lot of the leafs look droopy.
Never had to use a hose pipe.
Even when I used to do 50 tubs, 25 baskets and several flower pots I never used the hose. Did save the bath water one year though.
Rain gathers nutrients from the air as it falls, as @MrMow indicates. Half an hour of even quite light rain will do far more good than standing with a sprinkler for the same amount of time, and most folk wouldn't stand in the same place for that time, let alone do all their planted areas. Many people underestimate the amount of water that comes out of the sky during a spell of rain, compared to 'hand' watering.
Rarely have to water pots here either, and it would be very rare in spring, but I grow sweet peas and they need a lot, especially once the foliage gets going and can block it. Good rainfall is great for them during summer. I'm hoping we don't have that horrible dry summer here that we had last year
I live in west central Scotland - not where that photo is...
Tubs and baskets are different though, they do need watering every night.
Im not doing that this year, need to get some order into what I’ve already got.