I belong to the New Westminster Horticultural Society and this Sunday, May 2nd, is our annual plant sale from 10am-4pm at the Royal Westminster Regiment Armouries (530 Queens Ave). Lots of parking available next door at City Hall.
Thousands of popular and unusual plants will be available from perennials, bedding plants, basket stuffers grown from seed, lots of edibles including many varietys of tomato seedlings, hanging baskets, shrubs, lots of differnet roses and more.
All the plants are donated from members and friends gardens. Very resonable prices. It's quite a popular and busy event so you will want to get there early to ensure good selection.