The Landscapers Select 902726 Crabgrass Killer Fertilizer (23-0-4 N-P-K Ratio) is primarily designed to control crabgrass and suppress other annual grass and broadleaf weeds. While it may have some effect on Hairy Bittercress, which is a broadleaf weed, it is not specifically formulated to target its growth cycle. For more effective control, you might need a product specifically labeled for Hairy Bittercress