What is the meaning of ?

hemp-nettle

when (at a time in the past)

since, as

then (at that time)

then (in that case)

though, yet, then

a hemp-nettle

then; at that time

then; in that case

what about, how about

when; at the same point in time as

since, as; by background of the case being that

Source: wiktionary.org