All you need to do is use the code MGSBTS at the checkout for the discount. This is a really amazing offer and will only run for September and October courses (Course start dates: / )
MyGardenSchool courses include: Noel Kingsbury: Planting Design with Perennials, Harriet Rycroft's Container Planting, Paula Pryke's Contemporary Floral Design, Andy McIndoe's Gardening for Wildlife and many more.
Details on the courses available and about the offer can be found here.
I recently completed the Garden History course, by Toby Musgrave. I received my Certificate the other day which was rather exciting. So I can recommend these courses from personal knowledge. Reviews of my course can be found here: