Using too much pre-emergent on your lawn can have several consequences.

Firstly, pre-emergents are designed to control particularly noxious weeds and should only be used according to manufacturer instructions.

Applying too much of the product could lead to over-controller of weeds or unintended plants creating an unhealthy landscape with poor weed growth in general.

Secondly, when applied incorrectly, some pre-emergent products can burn grass, killing it if exposed to excessive droplets during application or by leaching into the root system after heavy rain or irrigation leading to a patchy looking lawn that detracts from overall landscape design.

For these reasons, it is essential that before using any herbicides you read the directions completely and apply them carefully and accurately as instructed by the manufacturer for best results on your lawn.

It is recommended to put pre-emergent on your lawn at least twice a year, in the early spring and late fall.

This will help to keep weeds from germinating and growing during these two times of year when they are most active.

You should also make sure to apply it according to the instructions on the label, as over-application can cause damage to your lawn.

Additionally, if you live in an area with extreme weather conditions or have a particularly dense vegetation cover, then more frequent applications may be necessary.

In any case, regular weed control practices such as mowing regularly and removing weeds by hand can help keep weed populations down in between pre-emergent applications.

The length of time pre-emergent stays active depends on the type of product used.

Generally speaking, pre-emergents that contain corn gluten meal may last from 6 to 8 weeks before needing to be reapplied, while inorganic materials such as ammonium compounds (e.g., ammonium sulfate) tend to persist for about 4 months.

Additionally, certain organic mulches and weed barriers can keep weeds down for up to 2 years if kept properly maintained.

Be sure to read the instructions carefully when selecting a pre-emergent product so that you know how long it will stay active in your particular situation.

After applying pre-emergent, it is important to wait until the product has been absorbed into the soil and the area is dry before planting.

Additionally, if rainfall is expected within 24 hours after application then it should be avoided as this can reduce the efficacy of pre-emergent.

Lastly, it is also recommended to water in pre-emergent if rainfall does not occur shortly after application as this will ensure that it penetrates deeply enough into the soil.

Following these steps can help maximize your pre-emergent's effectiveness and save time and money.

Pre-emergent herbicides are typically applied in late winter or early spring before the weeds start to sprout.

This ensures that the product is activated before the weeds have germinated and taken hold.

Applying pre-emergent too early can result in washout due to heavy rains, while applying it late will reduce its effectiveness as some of the weed seeds may have already germinated.

Professional landscapers recommend applying pre-emergents between February and April, depending on your region’s climate and soil conditions.

It is also important to follow recommended application rates for maximum effectiveness.

It depends on the type of pre-emergent you are using, as some products may require you to water them in immediately after application while others can wait up to 72 hours.

It is always important to read and follow the instructions on your particular product label for exact timing requirements.

In general, however, it's best practice to water in your pre-emergent as soon as possible after application for the most effective results.

Additionally, make sure that when watering-in you are doing so thoroughly and consistently across all surface areas where pre-emergent was applied.

By following these steps correctly and paying attention to any specific instruction listed on your product label, you can ensure that your pre-emergent will be able to do its job properly and keep weeds at bay!

Yes, it is OK if it rains after applying pre-emergent.

Pre-emergents are designed to be water soluble and will break down in rainwater or irrigation water.

Rain helps move the pre-emergent into the soil for root absorption and can help activate some pre-emergents as well.

However, too much rain could wash away some of the application so make sure to reapply about once a month for maximum effectiveness.

Yes, you can fertilize and apply pre-emergent at the same time. 

However, it's important to keep in mind that pre-emergents need to be applied about four weeks before you will see weeds. 

Additionally, make sure to use a fertilizer specifically designed for your soil type as well as one that is appropriate for the season. 

By taking these precautions when applying both together, you can help ensure successful results with your lawn care routine.

The amount of rain that is too much for pre-emergent depends on the type of herbicide being used.

Generally, most pre-emergents will not be affected by light to moderate rainfall (less than 0.5 inches) within a few days after application.

However, heavy rainfall or flooding shortly after application may reduce the effectiveness of some products, especially if they are watered in before rain.

Therefore, it is best to wait until there is no chance of rain prior to applying any pre-emergent and water it in afterward if needed.

If you don't water in pre-emergent, the pre-emergent will not be activated and won't have a chance to bind to the soil and prevent weed seeds from germinating.

Without proper watering, surface weeds can germinate before pre-emergent has an opportunity to work.

This could result in increased weed pressure later in the season, making it harder for you to successfully control weeds.

Therefore, it's important that when applying a pre-emerge herbicide product, these products should be watered in properly so they can be activated and have the maximum benefit of controlling weed growth.

No, pre-emergent does not stop all weeds from growing. Pre-emergent is a preventive measure that is deployed before any weeds are visually present.

It creates an invisible barrier in the top 1" to 2" of soil, preventing weed seeds from germinating and sprouting into visible plants.

However, some hardy perennial weed species or seeds may still be able to push through the barrier over time.

Pre-emergent should always be supplemented with regular cultivation practices to ensure no new weeds take root in your lawn or garden.

Yes, you can apply pre-emergent twice. Pre-emergent herbicides are typically used early on in the growing season to prevent germinating weed seeds from becoming established.

Applying pre-emergent twice during your growing season is a great way to ensure high efficacy of weed suppression since you're targeting both late and early germinating weeds.

If applying pre-emergent more than once during the season, the optimal times are late Winter/Early Spring, then again in Early Fall.

Pre-emergent herbicides are designed to prevent germination and emergence of unwanted weeds. The longevity of pre-emergents can depend on a variety of factors, such as the type of product and how often it is applied.

Generally speaking, products with longer lasting control tend to be those that provide beneficial soil residual activity; these widely range from 2 months up to 6 months depending on the product label instructions.

Some granular products contain polymer coated technology which can extend the persistence beyond 6 months, making them some of the longest lasting pre-emergents available in today's market.

For specific questions regarding which products may best suit your needs, consult a local garden center or relevant specialist for tailored advice on finding the right solution for your weed problem.

The temperature at which pre-emergent should be applied depends on the product being used.

Generally speaking, it is usually recommended to apply pre-emergent when temperatures reach between 50 and 65 degrees Fahrenheit.

Be sure to carefully check the instructions of your particular product as different products may require a slightly different application temperature.

Additionally, it is important to keep in mind that air temperatures can differ greatly based on location, time of day, and season so additional factors should be taken into account before applying pre-emergent.

For best results when applying pre-emergent, it is recommended that you wait for 12 to 24 hours before resuming lawn mowing activities.

Additionally, avoid mowing the grass too low after pre-emergent application and refrain from fertilizing until the actively growing season.

It is also important to water your lawn regularly following use of even the best pre emergent herbicide in order to help your lawn stay healthy which will work to choke out the weeds that you don't want.

The answer depends on the type of pre-emergent you use.

Generally, it's best to fertilizer your lawn before the pre-emergent application so that it can be absorbed by your soil and grass during the growing cycle.

When applying post emergent herbicides, then fertilizing after applying is preferable since fertilizing before will reduce the effectiveness of the treatment because you would be fertilizing the existing perennial weeds.

Regardless of whether you are applying a pre or post emergent herbicide or even fertilizer, it's important to incorporate light raking or aeration to help ensure maximum absorption and distribution throughout your lawn.

Using a liquid pre emergent herbicide over a granular pre emergent herbicide offers several major benefits.

Liquid products are an easier way to apply pre emergent herbicide can make a more cost effective way to control weeds over larger areas.

The best pre emergent herbicides can be mixed directly in water tanks or by adding them directly into the spray tank with water.

These products also offer excellent coverage along sidewalks and driveways, in addition to spot treatments or broadcast spraying on large areas of turf grass.

Finally, liquid herbicides provide better penetration of the soil than granular products for better longterm control of grassy weeds.

Either way, you will need the appropriate equipment to apply your product with either a pressurized or battery powered sprayer for liquid products or a lawn spreader for granular products, so that will need to be taken into consideration also.