Hello New-Gardener,
Welcome, you've come to the right spot...
There's tons' of good gardener's here...
A little bit of every type here,
from the brand new beginner *pardon the pun*
to the Master Gardener's..
You'll fit in nicely!!!
Any of the things you mentioned are wonderful additions to the potting soil you've chose..
Although on it's own, it's a very good potting soil mix... complete with good soil/ humus and peat moss in to it already and most of the time that stuff comes with a fertilizer in it....
My personal favorite is COMPOST... I make it myself, and you can also buy some in bags if you're new to gardening and/or haven't the space or time for it right now...
Peatmoss is a good organic ingredient to add to your mixes... I wouldn't add toooooooo much..
but it's good, I don't have a ratio of how I
mix mine up, usually 1/3 of potting soil, 1/3 of compost and some vermiculite and/or perelite or both...
Some of the potting soils' don't need anything really, they've got the fertilizer added right in, and may be over~kill for some types of
plants that don't need such a rich soil content...
Sorry, I'm completely new to this
Not to worry here, there's a bunch of new gardener's here, and we were alllllllll new to gardening at some point in time too you know...
We remember, and love helping those out that are just learning and love to help the
plants out too!
Weezie