Q.Deadheading
Greetings and Salutations !!! After mastering my lawn, I have now ventured out to flowers … perennials to be exact. One of my flowers from last year is the red-hot poker ( Kniphofia ) and several others with long, tall striking vertical blooms, I did not cut back any of the stalks. My question is … should I now go out and cut all of the spent stalks down to the foliage? Is that what deadheading is? If I do, do they grow back or do brand new spikes come up?

Certified GKH Gardening Expert
Yes. Deadheading is cutting back the stalk to the base or some just cut it off below the faded flower during the summmer. Now, after winter, you can cut back all the dead foliage and stalks. It will all grow back!
https://www.gardeningknowhow.com/ornamental/bulbs/red-hot-poker/red-hot-poker-plant-trimming.htm