Apply mulch after soil freezes in cold-winter areas. These tulips do not need chilling before planting. To discourage voles or gophers, add a handful of sharp gravel to the planting hole or plant bulbs in wire or fabric baskets. Don't mulch where rodents are a problem. Layer two different species, such as tulips and grape hyacinths, in the same bed for exciting color combinations.
Plant tulips first, then add enough soil to achieve the proper depth for the grape hyacinths.
Plant the grape hyacinths between the tulips. Copyright 2000, National Gardening Association. All rights reserved. Click here to receive up to four Free estimates from prescreened and insured contractors. Easily Become a Master Gardener with Pre-Designed Gardens.