<p>Christine Layton and Sabrina Hahn with all your new year's gardening tips and tricks. </p><p>10.22 Sabrina shares how to look after a hibiscus split in the Sunday storm a few weeks ago.</p><p>12.20 Why you should leave a grass tree to seed when it's flowering.</p><p>26:00 Why grass trees stalks appear to be getting bigger.</p>