How do I enter sightings from more than one garden?

You can add additional gardens to your registered account . After signing in, click the ‘sign up and register’ link on the ‘Join in’ pane. You will be directed to  ‘My Survey Garden’ where you will find the blue box; ‘Add a new garden’, clicking this button will take you to ‘Your Garden’ where you can enter your additional garden details.  Then next time your go to submit sightings, select the relevant garden name from the drop down.