"All the supermarkets sell them, they're on every street corner.
"We're giving our customers the option to purchase them when they come to get their barbecue needs."
The shops would have a limited range that were wrapped in such a way that a naked flame could not set them off, so they were allowed to be on open display, Morton said.
"We have selected packs that are very easy for shops to sell. They can just put them on display on the shop floor."
At Switched on Gardener in Henderson, a spokesman said the decision to sell fireworks was made six or seven years ago because of the extra money the company could earn.
"Even companies that don't have an interest in fireworks sell them.
"If you don't have huge income year-round it can balance you out for the year."
Some Switched on Gardener shops would make $20,000 or $30,000 a day from their fireworks sales, he said.
Hell Pizza is offering fireworks delivery alongside its pizzas. They can be ordered on the website, for anywhere from $5 for three "dragon's eggs" to $100 for a box of 20 fireworks.
There are no restrictions on the types of retailers that can sell fireworks but there needs to be an approved handler present if handling more than 500kg at any one time.