Jonathan Green Season-Long Weed Preventer

Product Description

Jonathan Green Season-Long Weed Preventer

  • Controls crabgrass before and after it emerges! Up to the third leaf stage
  • Contains Dimension® for season-long weed control protection
  • Can be used near flower beds
  • Safe to use around 100+ ornamental plants

Jonathan Green Season-Long Weed Preventer for lawns and landscapes contains Dimension®, a clear and odorless chemical that kills and prevents crabgrass both before and after it germinates – up to the 3rd leaf stage. At maturity crabgrass is a 7-leaf plant. Dimension® also stops more than 30 other grassy and broadleaf weeds from invading the lawn and garden beds if applied before the weeds germinate. The weed control lasts for the entire growing season. Crabgrass seeds germinate over many months, so if crabgrass has been a persistent problem, apply this product again in late-May to mid-June to stop these late germinating seeds from establishing. The easy to spread granules are also great to use to prevent weeds from growing around more than 100+ ornamental plants, all of which are listed on the product label.

10lb bag - 5000 sq.ft. - $24.98    30lb bag - 15000 sq.ft. - $54.98

In-store quantities & prices may vary on some items.
Maximum quantity available reached.

When to Apply:

Apply to crabgrass before and for four weeks after germination.   For all other broadleaf weeds listed on the label, apply before they germinate.

Spread this product summer through mid-fall (late August through early November) to control poa annua and crabgrass.  When spread in the fall a second subsequent application must be made the next Spring.


Use a rotary or drop lawn spreader to uniformly apply.  To select the proper setting see the Spreader Settings section in the accordion below.  Apply 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 overlap to avoid gaps in coverage.

This product can also be used in flower and landscape beds if applied after the plants are established.   Use a glove if spreading Season-Long Weed Control by hand.


Sweep any excess granules off of hard surfaces and back onto the lawn.  For best results, irrigate the treated area after application.  About ½ inch of water is sufficient to activate the weed control.  Once watered, wait a day to mow the lawn allowing the product time to activate.


Coverage: 10 lb Bag – 5,000 sq. ft. 30 lb Bag – 15,000 sq. ft.

Controls: Crabgrass and broadleaf weeds

Active Ingredient: Dithiopyr – Dimension ®

Can Be Used When Seeding: No

Apply to Dry or Damp Lawn: Dry

Safe for Children and Pets: No

Application Temperature Range: 50° – 80°F

When to Use: Spring, Summer, Early Fall


Click the link to the Jonathan Green Product Page and navigate to the Spreader Settings tab for recommended spreader settings.