What potting mix do you recommend for growing gerberas in pots...something that wont hold water and will drain

Thank you for contacting Yates. 

Try 'Yates Potting Mix with Dynamic Lifter'. A general purpose potting mix with added organic fertiliser and blended from high quality horticultural bark, giving both good draiange and air filled porosity essential for strong plant performance.  Suitable for most indoor and outdoor plant types including flowering, fruiting shrubs and vegetables. Click here for more info on this product: http://www.yates.com.au/products/pots-and-potting-mix/all-purpose-potting-mix/yates-potting-mix-with-dynamic-lifter/