Bark will rot down and feed the soil organisms, so there's good reason to do it other than the look of it. But water the plants very thoroughly first if you do it.
“It's still magic even if you know how it's done.”
I have large bark chippings in my raised beds. I went for large as in the past, smaller ones proved more popular than I would have liked with the neighbourhood cats. Chippings make life so much easier as far as weeding is concerned as any germinating seeds don't root in the soil and can be plucked out no problem. The good thing as well is that when the weather is hot, they'll protect the ground from drying out as much but you should give the ground a good soaking first.
I was going to let them spread out and fill any gaps with annuals next year. I always plant too crowded and things squish up too much. Taking easy this time! There is a hibiscus at the back, that will grow in time and I have some salvia cuttings to go in next year.
I went for Spruce Ornamental bark and it looks a lot better for it. I too am waiting for gaps to fill out. I thought in the meantime it looks nice and smells lovely and will improve the soil etc as it disappears.
Also has been great for weeding as they are a lot easier to get out.
Bark would be fine since that's what you have, just don't pile it up around the crowns of the plants. I don't use bark or woodchip (which is apparently slightly better for plants) because I plant so densely and constantly dig up and replant things lol.
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I live in west central Scotland - not where that photo is...
I could go and buy more compost.
I always plant too crowded and things squish up too much.
Taking easy this time!
There is a hibiscus at the back, that will grow in time and I have some salvia cuttings to go in next year.