I follow the instruction at the link below. Here is a link that might be useful: deadhead hollyhocks

If you choose to deadhead, I suggest using a pair of hedge trimmers or an electric hedge trimmer. You can shape the bush and remove the spent blooms at the same time. I've found, even with self cleaning types, deadheading results in faster repeat on many varieties. Do a test experiment. Don't deadhead two of them, hand deadhead two more, and use hedge trimmers on the other four. Let us know if any of the methods provide faster or better repeat and bloom. That's how I've found the best or easiest way to do many things.

How you deadhead clusters depends on the size of your rose and whether you want it larger or restricted in size. If the plant is still young and establishing itself, then I grab the cluster in one hand and cut through the upper part of the cluster with the other. This at least removes spent bloom and prevents the formation of hips. The rose then decides where it will produce new growth. Most cluster-flowered roses will produce new flowering wood from both below and within the inflorescence. Next pruning season, I can select where to prune. You wouldn't want to do this for exhibition roses, obviously, but for garden roses, it works fine with the vast majority of cultivars. There are the odd growers here and there that go haywire no matter how you deadhead them. If your rose is over-sized, then use deadheading as an opportunity to reduce its size by pruning to the next budeye below the cluster.

Keep as much plant as you can. So sorry about the buds being eaten.