Buddleia cuttings root really easily. Just cut several green pieces
off the tree at growing tips. The pieces should be about 2 to 3 inches
long. Cut the end of the cuttings at the lowest leaf node just under
the leaves then gently pull off those leaves and any further up the
stem so that you have only two leaves left at the top. Pop the cutting
into cuttings around the dge of pot filled with cutting compost or mix
up some compost with sand if you haven't any cutting compost. water
the pot then put the pot into a plastic bag. Inflate the bag and use a
tie twist to close the bag. Pop it somewhere warm in the light and
look in a months time. You should have several cuttings rooted and
you'll need to pot them on.