As a landscape gardener have found Watson's to have a fantastic range of quality plants (especially citrus) and great prices, I have no hesitation taking my clients their to stock up on a wide range of plants...and usually I can not resist getting something for my ever expanding garden
Large, healthy bedding plants like petunia, primroses, polyanthus, pansies and vege plants. Much bigger and cheaper than what you get at suburban nurseries. The seedlings I got in town look anaemic compared to the ones I got at Watsons. Worth a drive up from Wellington if you're into gardening.