19 hours, 49 minutes

A recommended Tasmanian Devil garden would include the following -
A Fully Grown Mushroom
(For best results, if you are able to, use a Supershroom - please remember you may get Caterpillars though!
Alternatively, use a Fully Grown Pink Cap Mushroom, unless you have not progressed that far, then use best available.)
1 x Fully Grown Aureus Fibonaccius
1 x Fully Grown Aureus Primus
1 x Fully Grown Aureus Naturalis
1 x Fully Grown Aureus Triangularis
2 x Fully Grown Zodiac Plants
1 x Fully Grown Chie Bonsai
1 x Low Table Organic Veggies

TOP TIP
Use 2 Fully Grown Zodiac plants to keep out the Kangaroos, use whichever Zodiac is current, all Zodiacs deter the Kangaroo, remember to replace when Ready For Harvest, use a Chie Bonsai to deter Wallaby and Koala, note this set up leaves only 1 space for food.