I was recently browsing the
Grower Talks website and came across an article on the pest control department of your retail nursery. Although the article comes from an American perspective I think many of its comments resound for the Australian nursery too. I've attached to this forum post a PDF of the article so please have a read and if you have any thoughts or something to share, be sure to hit reply

"Solutions. Expertise. That’s why customers are attracted to your garden center, especially if you stock quality products, have superb display maintenance and hire knowledgeable staff. This is where gardeners go for answers to pest control questions and, eight times out of ten, purchase a product based on the advice of your expert staff.
And there’s probably no product category or department where your expertise is needed and appreciated more than pest control. Build a reliable pest control department, and the customers will come."