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When does crabgrass become active?
The arrival of springtime means dazzling displays of seasonal color annual flowers, blossoming bulbs, and green grass. Unfortunately, with this abundance 0f Mother Nature’s beauty comes sprouting weeds as well. Crabgrass is one such weed that continually frustrates homeowners year after year. Crabgrass is an annual weed whose seeds germinate during spring and summer. Crabgrass germination occurs when soil temps reach 55°- 65°F at a 3″ depth for 5 consecutive days. Un-germinated seeds can endure in the soil for up to thirty years before germination and sprouting occurs. Given the fact a single crabgrass plant can produce 150,000 seeds during the growing season, it’s easy to see why controlling it is difficult.
While crabgrass can resemble your grass at first glance, it does look very different upon further inspection:
• Newly sprouted crabgrass can appear a light green (lighter than your turf) but may eventually turn a dark, dull green as it continues to grow.
• The leaves of crabgrass are broader than grass blades.
• Crabgrass grows in “clumps” low to the ground. The stems of the grass grow laterally, or outward instead of upwards (like grass), and resemble the legs of a crab extending outward from the middle of the plant, hence the name of this weed.
• Crabgrass favors sandy, compacted soil where the grass is in a weakened, thinned condition. Bare, thin lawns allow sunlight to directly hit the soil, which is an ideal condition for crabgrass germination. In addition, weeds like crabgrass thrive when your lawn has excess water and phosphorus levels.
To control crabgrass apply a pre-emergent fertilizer before the germination period to organically control its growth and spread. Crabgrass preventer products use what are known as “pre-emergent” herbicides, which target germinating seeds before new shoots can emerge from soil.
Pre-emergents work by inhibiting seed germination and root development so that seeds can’t become established plants. Highly effective preventers such as Jonathan Green’s Crabgrass Preventer plus Green-Up Lawn Fertilizer control crabgrass and other germinating broadleaf weeds. Because crabgrass preventers only work before crabgrass seedlings emerge through the soil, timing applications right is critical to success. Preventers must be applied before crabgrass seed germinates. Crabgrass seeds can germinate from early spring until late summer when soil temperatures are right.
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Crabgrass Preventer plus Green-Up Lawn Fertilizer
Fertilizer analysis: 20-0-3
Feeds the lawn for up to 3 full months
Kills crabgrass both before and after germination
Clear & odorless herbicide that does not stain hands, shoes or walkways
Same season-long results as other crabgrass preventers with fewer harmful active ingredients
Jonathan Green Crabgrass Preventer plus Green-Up Lawn Fertilizer feeds the lawn for up to three full months and provides pre-emergent control of crabgrass. When applied prior to germination it controls other weeds such as goosegrass, dallisgrass, chickweed, henbit, and oxalis.
This product contains an advanced herbicide known as Dimension® that provides postemergence control, meaning it will kill existing weeds, such as crabgrass, even after they germinate. Postemergence control is limited to crabgrass and is effective for up to four weeks post-germination. It will only kill the plant up to the 3-leaf stage of growth; a fully mature crabgrass plant has 7-leaves.
When to Apply:
• Apply in the spring prior to germination of crabgrass and other grassy weeds.
• Best time to apply is from late February through mid-May depending on region.
• Spread this product a day or two after mowing and when the lawn is dry.
• Do not apply when seeding or under newly laid sod.
How To Apply:
• Use a rotary or drop lawn spreader.
• Check that the spreader opening at the bottom of the hopper is set for the proper setting
• Push the lever forward only when ready to spread.
• Apply fertilizer around the perimeter of the lawn to establish a turning area. Then run the spreader back and forth within the area outlined by your first perimeter application. Always allow an overlap to avoid gaps in coverage.
• Sweep any excess granules off of hard surfaces and back onto the lawn.
• Thoroughly irrigate the treated area after application for best results. About 1 ½ inches of water per week is sufficient between rainfall and irrigation, but not to the point of run-off.
• Once watered, wait a day to mow the lawn allowing the product time to activate.
Jonathan Green Crabgrass Preventer Plus New Seeding Lawn Fertilizer
A soft, green lawn is a wonderful thing, and it doesn’t have to be out of reach. Specially formulated for lawn repair and sod lawns!
Key Product Details
- 15 lb bag (5,000 sq ft)
- Contains iron for deep greening
- Provides quick results
- Prevents crabgrass and grassy weeds from germinating and allows yo to seed on the same day without injuring seedlings
- Feeds new seedlings longer
- Requires much less chemical in a clear, non-staining, odor free formula
Prevents crabgrass and grassy weeds from germinating and allows you to plant grass seed on the same day without injuring seedlings. Contains 30% slow-release nitrogen to feed new seedlings gently and longer. Smaller particles provide better weed control. Can be used with new sod lawn installations. Use as an alternative to the 1st Application in our New American Lawn Program when seeding. Contains Tupersan®.
When to apply – Use prior to germination of weed grasses in the spring.
How to apply – For best results, apply to a dry lawn before a rain or water in after application.