I refresh my beds Just before I plant in spring and fall. I remove what needs to go. (I also garden year round, and find it difficult to remove producing plants to plant new plants that won't produce for a while). I will mix what ever I have on hand. Today it was fish bone meal, azamite, green sand, bio live, a tiny bit of kelp meal, a little veggie fertilizer. all organic. I mix it in a bucket, and lightly sprinkle it on the beds. It's not very much, but I figure especially since some are raised beds I need to replenish what the plants may have used. I want them to not only taste great, but be as nutritious as possible. Then I will top the beds with what I have. Today it was compost, potting soil, and soil conditioner. It's all organic. I work at a co-op, so if I can get a broken bag for a deal I will grab it, if you read the ingredients, they are all about the same. My beds are all filled with wood in the bottom, so over the years the soil level gets lower. I fill them as much as I can when I can. Even with my discount it can be pretty expensive. I'm working on making compost, but even though it's actually heated up this time I will never be able to make enough to keep my beds full. Then I water it well and plant.
I have to confess I enjoy the clean fresh look, and the the potential for amazing veggies, fruit, herbs and flowers to come.