I am a learner at this myself. This day runs from 11am to 5pm and is a talk and also one of the preparations which 'enlivens' the elementals in your soil will be made.
The venue is Rudolf Steiner house, Baker Street being the nearest underground, but I dont have the exact address you will need to look it up.
I find this a fascinating subject after which being organic alone doesnt seem enough.
If anyone goes love to hear what you think. I'll be there!