Elaine .......
Thank you for taking the time to share your knowledge about the benefits of mulching with plant organic materials.
No, I won't be mulching with gravel. I do understand the heat retention issues.
I plan to use shredded leaves with a thin topping of wood chips to keep the leaves in place.
Since I mulch twice a year, the layer of mulch I put down in fall usually is quite decayed before I add my spring mulch to the beds. Of course, this year, without the usual rains, that process has slowed down. I'll still be adding organics, but won't let them be more than the recommended two inches.
I won't be making new beds during the drought. This year is just about keeping things alive.
Smiles,
Lyn