Leaves are turning yellow.
Certified GKH Gardening Expert
Yellowing leaves can be an indicator of watering issues. To much or to little.
You can easily make adjustments to needed more water, but if they have received to much water you will need to watch a little more closely.
Last year I lost all my Hollyhocks to heavy rain. The good news is they are back again this year!
Here is a link to the care of Hollyhocks.