Good idea, I’ve got top soil in my big box containers, I just top up if I have any small amounts of compost. There’s no goodness in bought compost and not much more in home made, they’re just soil improvers.
Gardening on the wild, windy west side of Dartmoor.
It's even recommended. Starts your plants off with your local biolife mix and prepares them better for local pests. If you have those fabric sided trugs don't go overboard with the soil, it's a lot heavier and will break through the fabric. If you only have small trugs you might want to consider a water retaining gel/powder, the stuff they sell for hanging baskets.
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Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.
I live in west central Scotland - not where that photo is...
There’s no goodness in bought compost and not much more in home made, they’re just soil improvers.