“Coming Soon” feature on items

[#1]

Hi... I own a garden centre. We sell annuals flowers when they are ready for sale and the weather is warmer.  I know what my quantities and the types and sizes.  I want my customers aware that these will be available soon but can’t figure it out on Square. I also can’t Pre sell them because I’m too big to have a layaway greenhouse for sold items.  What to do, what to do?!  Any hints?