I just got a bag of Halts Crabgrass & Grassy Weed Preventer and a bag of Ringer fertilizer. It's been a pretty warm winter here in CT with temps regularly in the 50s and 60s this month. When would be best to apply the Halts? Mid-March? And how long to wait before adding Ringer after the application of Halts? Most people say 3 months. Is this too late in the year?