key with some of these soil amendments adjustments is based on the medium status itself. If it’s to sandy or to clay like is the balance if you add more of these kind to rebalance ur medium. Key is not Too much and Knowing it’s balances
for promix multi season reto-dressed super soil , what I do is every 2-4 weeks apply gypsum at 1cup for 100 gal medium . I will visually inspect every time I’m top dressing if It’s needed.
If you have hard clay or noticeably salty soils, gypsum can make your gardening journey so much easier.
www.familyhandyman.com
Gypsum can be helpful for breaking down hard-packed clay soils and reducing sodium levels in coastal gardens, but it isn't an essential addition
www.thespruce.com
also like all of this getting seasonal soil test it will def tell you the generals and if you need to adjust anything .