I pre mix the day before feed so I have it ready. And yes, lid them and they are fine.You can pre mix and let sit at room temp without air? Just making sure I don’t do anything stupid.
The big shelf is waiting to be filled, the small shelf are full of active feeds. If you do get PBlend, you mix according to the additives. You go down the list in a specific order to be sure to mix everything properly.
Dry amendment toppings, scratch the top of your soil and add the toppings then water to get them working through.