Carol from Meridian, Id writes
If you are asking about Fertilome Weed free Zone with 2,4 D the label suggests the the product will harm ornamentals. Part of the label shown below:
Do not allow spray drift onto Vegetables, Flowers, Ornamental Plants, Shrubs,
Trees and other desirable plants since injury may result.
• Do not exceed specified dosages for any area. Be particularly careful within
dripline of trees and other ornamental species.
• Do not apply as a fine mist because of potential injury to desirable plants.
We recommend to contact the master gardener for a product recommendation that works in your area to safely treat around the tulips. Here is the link http://www.csrees.usda.gov/Extension/index.html
Answer last updated on: 05/11/2013