How long the Pendulum 3.3 EC lasts depends on the rate used at application per the product label. It can last anywhere between 2 to 4 months at lower rates or 6 to 8 months at high rate. Please refer to the product label for complete information and instructions.
The best time of year to apply Pendulum depends on what zone you are located in. Please review our Lawn Care Guide for the best dates of application for a pre emergent.
The first thing you need to know when using an herbicide such as Pendulum is that the exact amount of water you dilute it with is not important. It is only important to make sure you are using the correct amount of product per 1,000 sq ft of lawn. Use too much and you risk damaging your lawn, use too little and you will not get adequate results. You will need to use 1.3 - 1.8 oz of Pendulum per 1,000 sq ft of lawn. To decide how much water you want to use, you should mark a 1,000 sq ft area, fill your sprayer with water ONLY, and start walking and spraying just as if you were doing the actual application of herbicide. When you are done walking and spraying the 1,000 sq ft area note how much water it took you to spray that area, and that is the amount you will want to mix 1.3-1.8 oz of product with for each 1,000 sq ft area that needs to be treated. You will need to make sure treated areas are irrigated with at least 1/2 inch of water (either by rainfall or by sprinkler) following the application.
According to the label for Pendulum 3.3 EC, it is recommended that you wash the area immediately so that the product does not stain. The manufacturer says that muratic acid (found at many janitorial supply stores) will help to the yellow stains left from Pendulum 3.3 EC.
Pendulum 3.3 EC will likely not harm your lawn, however, because dichondra lawns are considered a type of ground cover, it may prevent the lawn from growing.
As long as Pendulum 3.3 EC was only frozen for a very short period of time, and if after it was thawed out it went back into a solution (the way it usually looks) it should be fine to use. However, if it appears that there are particles floating at the top, the product appears discolored, or the product will not go back into a solution, it should be discarded and replaced. Be mindful that Pendulum 3.3 EC should be kept out of extreme temperatures and kept in a room temperature environment out of direct sunlight.
Pets and other people should stay out of areas treated with Pendulum 3.3 EC Herbicide during application and at least until the product is dry. Often the primary reason for this is to make sure that walking around on the wet application does not disturb it, rather than because of health concerns. You may view all the product documents we have if you scroll down on the product page linked above.
It is recommended that you wait at least three months after applying Pendulum 3.3 EC to reseed or overseed your turfgrass. It is also recommended that you allow the turf to recover prior to making an application of the product.
Because Pendulum 3.3 EC is a pre-emergent herbicide, meaning it is designed to prevent listed plants from growing, it would potentially keep Kentucky bluegrass or other turf from germinating. You should not plan to re-seed or overseed at the same time or close to the herbicide application. Per page 6 of the product label, "Delay reseeding or winter overseeding of treated turfgrass for at least months following the last Pendulum 3.3 EC application. Delay sprigging turfgrass for five months after application. Tenacity Herbicide and Tupersan 50 WP Herbicide can be used at seeding of Kentucky bluegrass. Please refer to the product labels for complete application instructions.
Pendulum does not affect grass or weeds that are already there. It is only a pre-emergent and will prevent weeds from emerging. It should not have damaged your lawn. A fertilizer can be used. We would recommend checking out our Cool Season Lawn Guide for tips and instructions on when to do fertilize, seed, etc. your lawn.
We would not recommend using Pendulum 3.3 EC within 6 feet of a well.
Per the product label, you should delay reseeding or winter overseeding of treated turfgrasses until at least 3 months after the last application of Pendulum 3.3 EC.
You could potentially mix multiple herbicides together as long as you have the correct dilution rates for the products and your timing is still accurate. Just remember that you will need to use sufficient volume with pre-emergent herbicides such as Pendulum 3.3 EC to carry the active ingredient into the soil through the thatch of grass. We would also suggest performing a small jar test before mixing a large batch to be sure new mixtures are compatible.
Pennant Magnum and Specticle FLO are pre-emergent herbicides that can help prevent nutsedge.
Yes, Pendulum 3.3 EC is labeled for johnson grass in a Kentucky Bluegrass and Fescue lawn. Please let us know if you have any further questions or concerns.
Pre-Emergents like Pendulum 3.3 EC should be applied before the weeds start to germinate. We suggest that you contact you local Extension Office to get the best time for your area. The efficacy of this product will improve if followed by 1 1/2" of rainfall or its equivalent in sprinkler irrigation. If it is not activated by rainfall or irrigation within 30 days, erratic weed control may result. You apply it at 1.3 - 1.8 oz per 1000 sq ft or 3.6 to 4.8 pts per acre.
According to the product label for Pendulum 3.3 EC, it is safe to use around and over the top of oak and maple plants.
