Posted: 27/04/2012 at 22:37
You have varieties of what is commonly known as English Lavender. The Munstead is just a bit shorter and more compact.
Lavenders like conditions dry and sunny so you should add lots of grit when planting, especially in containers. They don't like wet feet in the winter so some people sit them on a pile of grit when planting, and don't be too kind to them, they are tough plants really.
The worst thing that happens with Lavenders is that people don't prune them so they grow and grow and get all sprawling and ugly.
Plant them with a space between each plant that is the plants mature size or just a little bit less to keep them neat together, so if the label says its width will be 12 inches when mature, the gap between each plant should be 10-12 inches. And, really, Monty advises to cut them back the first year, to promote good bushy growth.
The idea is to cut back as far as you see new growth, but not into old wood, because they don't grow from old wood. Now is a great time to trim them for flowering late summer and you can trim them late summer to bush them up a bit. but not too late because the frosts will damage tender new growth.
They grow fast so next summer should see an amazing display.
That's all I know Good luck