I’ve potted some Rosemary cuttings from a well matured bush.
I followed the online directions but have two questions; (1) How often do the cuttings require watering? (2) What temperatures will they tolerate?
Certified GKH Gardening Expert
They require water when they start to dry out down to an inch or so. There is no set time, since this depends on the conditions around them. Overwatering will lead to rot, and underwatering will lead to a failed cutting. In this case, though, underwatering is better. USUALLY, you will not need to water them at all until after you remove them from where they are rooting, as the humidity should remain high enough to prevent severe evaporation.
They will want to remain in temperatures that don't exceed the 80's during the day, and does not fall below 50 at night for proper rooting. A seedling heat mat can help if the temperatures cannot remain as warm as you need them.
This article will offer more information: https://www.gardeningknowhow.com/edible/herbs/rosemary/how-to-propagate-a-rosemary-plant.htm