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
If using a Scotts Broadcast Spreader when applying Ferti-Lome Weed Free Zone Plus Lawn Fertilizer 18-0-6, the setting should be at 4.5. Each bag will cover 7,000 sq ft and is applied at 2.5-3 lbs per 1,000 sq ft.
The Ferti-Lome Weed Free Zone Plus Lawn Fertilizer 18-0-6 product label specfically states not to use on St Augustine lawns. Ferti-Lome Weed-Out Plus Lawn Fertilizer 25-0-4 could be used, if your lawn needed this amount of fertilizer and is not Floratam or another improved variety of St. Augustine. We would recommend taking a soil sample to your master gardener to get it tested. Once you know exactly what your soil is lacking, we will be able to make a proper recommendation for you in regards to fertilizer. For St Augustine lawns this product is applied when weeds are actively growing, this is typically April - May.
Ferti-Lome Weed Free Zone Plus Lawn Fertilizer 18-0-6 is not labeled for crabgrass.
