Barrow - I'm sorry if you felt the rest of us hadn't been helpful to you. I didn't reply because I'm a useless gardener! We had a big garden at our old house and employed a gardener, when we could find one and if they kept coming once we had employed them (or worse still drinking sherry in the shed!!0. When we moved we found looked for a house with a small garden that we could manage ourselves. When my husband retired we had the garden landscaped and got rid of the grass
so we had the freedom to enjoy the garden without the tyranny of perpetual mowing.We developed a planting plan with a garden designer and she did the planting. Since then I have really enjoyed gardening and have changed more or less all the plants and how the various beds are used.
My point is, that I have done stuff by trial and error and planted what I fancy, where I fancy it and, if it fails, plant something else!
Also, every weekend paper has a list of things to do each week and, often, recommended plants for various situations, time of year, soil type etc.
Enjoy you garden - don't let is scare you 