Posted: 06/08/2013 at 20:47
You can take cuttings from buddleia. You need to take pieces that are about the thickness of a pencil. Make sure you remember which end is the top and which the bottom (where the roots will form) of your cutting. Get a tall pot and fill it with compost and grit mixed together. You can put several into this pot, push them in around the edge of your compost mix. They may 'take' just out in the garden but I would put them either in a cold frame, or cover them with a plastic bag (with a few holes made in it) so they get a bit of protection. Then keep the compost moist and wait...and wait some more! They can take AGES to root and very probably most of them won't (some varieties are easier to root than others in my experience).
Buddleias also seed everywhere but the ones that do that inmy garden never come true to type and the seedlings always turn out to be the very ordinary mauve colour, but tough as old boots. If you have other varieties you will have to take cuttings to get more of those.
Mulch is stuff that you put over the soil. It keeps the soil nice and warm and offers some protection from the weather. Some plants like a manure mulch, some like things like bark chippings. I keep ponies and they provide an unlimited supply of manure, so I never buy mulching stuff. My plants have to make do with manure whether they like it or not