Both are slow to root even with the assistance of a rooting hormone. hydrangea takes 21-60 days & Vib around 80 days.
give the cuttings a gental tug to see if resistance indicating the start of rooting. remove tent after roots form.

thanks, george ... guess i have a long time yet to wait ... darn!

presuming it takes the full 80 days for the viburnum to have sufficient roots, then my next question is:

do i keep them tented for the entire time & can i presume they will need to be taken outdoors in a month or so?

thanks, phyl

without roots.. they rely on you to give humidity .. ergo.. they must remain tented ...

the sun is probably too harsh .. you would be better off leaving them under lights.. or where they are.. until rooted ...

unless you just like adding 100 variables to the system ...

patience!!!

ken