what no rain for 8 days ,well there has been a little ,still do not have to water them apart from added fertilizers ,2 out of 5 is budding .1 is budding like mad

,and 1 is just budding,
now my problem is it is
should i cover the plants that are not budding to make them bud ?1 is in a pot so can be moved inside if i have to,i also got one in my herb garden in a large planter could dig it up take it inside later.
it is getting cold at night,what can the plants take,frost will damage my girls ,below what temp should i start to worry? ,could put a big cardboard box/ big plastic bag over everything? is it a good idea? does any of you ladies and gentlemen think this is a good way to keep cold temp/frost off for now
.1 last question after a late night chat with a mate ,if a branch got broken off could you put in vase to in the sun to mature the buds on it ,i say it could work,and what have you to lose ,mate says through it away.