There isn’t an exact date we can mark on our calendars expecting weed seed germination. Although, a tell tale sign for sprouting weeds is the bright yellow forsythia blooms. The forsythia is in full bloom when soil temperatures reach 55 degrees. Weeds can become eyesores in your home and garden. The weeds will compete with your grass for sunlight, water, air and essential nutrients. Pre-emergent can prevent such weeds so you don’t have to pure them later into the season.
When properly watered in, at the right time, pre-emergent herbicides will form a thin barrier in the top layer of the soil -- stopping most weeds in their tracks. Pre-emergent herbicide works by inhibiting the weed seed from germinating.
At this time, in our area, applying pre-emergent will prevent against summer annual weeds. Applying pre-herbicide, year round, will be at your best defense for all annuals and perennials. Suggesting, you apply now -- in May, August, and in October, you'll give these weeds hardly, a fighting chance.
What you use is based on the type of weeds you have. Shaw's Treflan 500 Granules works on certain annual grasses and broadleaf. In our experience, this pre-emergent offers a diverse coverage against weeds and broadleaf weeds. Another recommended pre-emergent is Hi-Yield Herbicide Granules with Treflan combats most common, chickweed, goosegrass, sandbur, thistle, and many broadleaf weeds. Rotating pre-emergent herbicide is also recommended as certain weeds will develop tolerance and adapt.
We do recommend these products after all non-chemical methods. Non-chemical methods include laying weed barrier in beds, plucking seed heads v. mowing over, and other cultural practices. Pre/post-emergents are chemicals and should be handled correctly.