Here's a photo from last years event held on the 24th of June:
The gardens, craft studio and wildlife haven will be open. Enjoy our new willow sculptures in the gardens and buy plant supports made with our own willow harvested near Plaum's Pit. Refreshments from Friends of Twigs make a welcome return. Enjoy our beautiful organic gardens and discover ideas to take home for your own. Our Plants remain at the same prices this year as last.
Here's a copy of their poster with opening dates for 2013:
TWIGS also open under the National Garden Scheme, as you can see from the above poster,on the 21st of July, and opened on the 26th of May. www.ngs.org.uk If you click on the link, do put in your postcode and find gardens open around your area.