growing daffodils on the Gulf Coast

Friends, I’ve been enjoying the show photos, and Jason’s ‘fun’ daffodils would be welcome in my yard anytime!

Last October I asked for help identifying daffodils that would grow in Zone 8BCi, the Gulf Coast, between Galveston & Houston TX.  Because of your suggestions, Sweetness, Polly’s Pearl and St. Keverne are now in bloom and the envy of my friend’s neighbors!
Thank you.
But this raises the question — what can or should my friend do to promote the bulbs’ flowering again next year?  They are in full sun, and St. Keverne is in a pot.
Thank you and have a happy week.
Vicky