What do the zone numbers listed next to items in the Bulb and Perennial and Rose and Flowering Shrub Catalogs really mean?
There are zone numbers listed next to all items in the Bulb & Perennial Catalogue, all items in the Rose and Flowering Shrub Catalogue, as well as perennials in the Seed Catalogue. These zone ratings will give you an indication of how hardy a plant is. For instance, if a plant is listed as Zone 4-7, this means it may not overwinter (it is not hardy) in zone 3,2 or 1. Zones 8 and above may be too mild a climate for it to thrive. You won’t see a zone listed beside annual items, or vegetables in the seed catalogue, because they can be grown just about anywhere. You won’t be trying to overwinter them, so it doesn’t matter what the winters are like. Learn more about tender bulbs and hardy bulbs.
