Seedguy Hydroseeding                 1-888-SEEDGUY  (733-3489)
Specializing in fine grading and seeding since 1995

                                       Maintenance Information








Do not water until the hydro-seed application has completely dried. This allows the tack to set which helps hold the mulch, seed and soil together.

For optimum seed germination, the soil surface should be kept moist for a period of 6 to 8 weeks.

To prevent washouts, it is recommended that you avoid watering when heavy rains are predicted.

To prevent fungus, it is recommended that you water thoroughly every other day when temperatures are 85 degrees or higher.




   The lawn may be mowed after the grass has reached a height of 3 1/2” to 4”.

    The cutting height of the mower should be set no lower than 3 1/2”.

    The mower blade should be sharp to prevent tearing.

    The clippings should only be picked up to prevent ‘clumping’ of cut grass. 

The lawn should be cut with the lawn mower set on 1/2 to ¾ throttle to reduce the amount 
    of suction generated by the mower blade.

   The above procedures should be followed for the first 2 or 3 cuttings.




   Fertilizer should be applied after the first 4 to 5 weeks.

    The weather conditions will determine the type and quantity of fertilizer used. 

Weed killers & pre-emergent must not be used until your grass is established. Usually 10 to 12
    weeks under optimum conditions.

Weed killers should not be used when conditions are dry and/or temperatures are 85 degrees or 


Frequently Asked Questions


Do I have to water the area hydro-seeded?


How often will I have to water?


Can I over water?


        Water is necessary for seed germination. If you do not water and we do not have any rainfall, the seed will not germinate. Depending on the temperature, frequency of rainfall & wind, it may be necessary to water several times per day on a daily basis. The objective is to keep the top inch of soil moist at least 70 to 80 percent of the day until the grass has reached a height of approximately 2”. Frequent light watering is much more beneficial to seed germination and turf establishment rather than heavier, less frequent watering. Once the grass has reached a height of approximately 2”, and the soil is covered with 85 to 90 percent grass, it is recommended that watering be cut back to 3 to 5 days per week (taking rainfall into consideration). This will wean the turf off the previous, more frequent watering schedule.

        It is possible to over water. When watering, it is important not to water to the point it causes piddling of water. Over watering during times when temperatures are high, usually 85º Fahrenheit or higher, and humidity is high, over watering can promote the growth of fungus. Fungus can damage or kill large turf areas in a short amount of time. Less frequent, light watering is recommended when temperature and humidity is high.

         If heavy rainfall is predicted, it is highly recommended that you let the soil surface dry prior to the time the anticipated rainfall is to occur. If the soil surface is moist, the chances of a heavy rainfall to undermine the hydro-seeded area are greater.




Sprinkler System versus Hoses


Must I have an automatic sprinkler system?


         A sprinkler system may be helpful if you are not able to move hoses and sprinklers as required or if you are trying to water a very large area. If you do not have a sprinkler system, depending on the size of the area seeded, you may need to move sprinklers and/or hoses around your yard to make sure all the seeded areas get plenty of water. Remember, watering is a very important part of establishing a plush, thick lawn. Another thing to think about is that mother nature does not always come through as we wish and that is why we must provide water for the new seedlings. We do suggest that you water your lawn for 6-8 weeks. If  you water the lawn for a couple of weeks and then get tired of moving hoses, you risk killing new seedlings that may have germinated but have insufficient root establishment to support plant life during dry conditions. Also keep in mind that with an automatic sprinkler system you still have to monitor watering. If they are forecasting rain for a couple of days you will have to cut back on watering. If your sprinkler system is equipped with a moisture sensor, you must remember that your sprinkler system will shut down automatically after a rainfall has occurred. If you program your controller to water frequently and you do not monitor the watering, you could very well experience problems caused by over watering. Refer to “Watering” for more information.




My Hydro-seeding was put in a couple of weeks ago and the grass is starting to grow but so are the weeds. What should I, or can I do about them?


There seems to be a lot of weeds and/or crab grass in my yard. Do you spray weed seed when you spray the Hydro-seeding?


 Is there anything I can do to avoid weeds and/or crab grass?


         Depending on the time of year, weed growth may occur with newly seeded yards. There is no weed seed in the Hydro-seeding mixture. Weed seed is prevalent in soil. It is very common for birds to distribute these seeds as well as the wind carrying them through the air. Most weeds are annuals and will usually start to die out after the first frost. But their seeds will bed in the soil until the environment it right for them to germinate and grow. Weeds like warmer, drier conditions. By not letting your lawn dry out for extended periods of time, you will reduce the favorable conditions required for weed growth.  We recommend that the lawn should experience at least 12 weeks of favorable growing conditions before any applications of selective herbicides (weed killers) or pre-emergent be applied. Most of our seed blends used contain varieties of Kentucky Bluegrass. Kentucky Bluegrass takes roughly 28 days to germinate. This is 4 weeks under optimum conditions. If one of the conditions is not met, the germination process would more than likely be prolonged. If a pre-emergent is used before seeds have germinated, it will prevent them from germinating. If a selective herbicide (weed killer) is used before the turf is established or during times when the turf is under stress, it may severely injure or kill the turf. Some people feel the need to pull that weed out of the ground. Unfortunately when doing so these weeds can have a large root base and when pulling them out of the ground you could also pull out seeds or seedlings that are around this root base causing a bare spot in your lawn. We suggest that you leave the weed there and when the time is right, have a selective herbicide (weed killer) applied to remove these pests from your lawn.


Seed Growth


How long does it take for the seed to grow?


Some of the area’s seeded are starting to grow and some are not. Is that normal?


        There are three very important conditions to obtain optimum seed germination and plant growth. First you need a good soil. If your seed bed contains too much clay, your ground becomes too dense and hard making it very difficult to establish good root growth. If your seed bed contains too much sand, then it will be extremely hard for your seed bed to retain a sufficient amount of moisture to support plant growth. We suggest that if you have a clay base area to be seeded that you should add a minimum of 2”of sandy base topsoil. If you are dealing with a sandy base area to be seeded, such as yellow sand or coarse sand, then we would recommend 3 to 4 inches of a clay based topsoil.


        The next important thing is water. Your seeds must be kept moist, but not saturated. Kept moist could mean, not watering at all today because it had rained enough to keep the ground moist all day or it could mean that you need to water as many as 8 times a day because it is a very sunny, warm and breezy day resulting in quicker evaporation, which in turn will dry out the surface of the Hydro-seeding. It is likely that the germination process will be extended if you are watering only one or twice per day during time when there is little or no rainfall. Insufficient watering will more than likely have an effect on the germination and growth rate. It will usually extend the time it takes for the seed to germinate. For example, if your seed blend contains perennial turf type rye, it will take 7 to 10 days to germinate under optimum conditions. If the seed is not watered sufficiently, then it might take 15 to 20 days for the seeds to germinate.


        The last thing is temperature.  When we talk about temperature, we will be referring to what is called a “DEGREE DAY”. A Degree day is a day when temperatures are 50º or higher for a 24 hour period.  When referring to the seed chart, the Days to Germinate is based on degree days. When temperatures fall below 50º, it may prolong the time it takes for the seed to germinate.  For example, if you have planted a seed which has a 7-10 day germination period, and temperatures reach 70º during the day and fall to 35º during the night, then that particular day would not be considered a full degree day, therefore, prolonging the length of time for the seeds to germinate. Ground temperatures also need to be 50º or higher. If seeding is performed in the early spring, the germination period may be prolonged even if you experience the amount of degree days required for germination due to cooler ground temperatures. If you seed in the fall, the germination period may not be prolonged even if you do not experience the amount of degree days required for germination due to warmer ground temperatures. If night time temperatures are below 50º, it is unlikely that it will hurt the seeds, what it will do is prolong the germination process.




How important is fertilizing?


When should I fertilize?


Should I get on a fertilizing program with a company that provides this service?


How do I know what fertilizer to use and how much?


Can I do any damage by fertilizing my lawn myself?


        Fertilizing is also a very important step. In the Hydro-seeding mix we use a starter fertilizer which will last about 4 to 5 weeks. At that time we suggest that the first application of fertilizer be applied. You will be able to tell when you lawn is ready to be fertilized. When the new grass starts to grow, it is a dark green. As the weeks go by you will start to notice that the grass will start to lose that dark green color and begin to look light green or even yellow in color. This is an indication that it needs fertilizer. What you need to do is find the square footage of your property. This can be found on your estimate. This will assist you in purchasing the right amount needed to cover your area. Some of the products contain insecticide. If you find that you have an insect problem, such as grubs or sod web worms, a combination of fertilizer and insecticide is what should be applied. Grubs and/or sod web worms can be a very serious problem. These particular insects eat grass roots. The grass then may die out due to an insufficient root system necessary to support top growth. Insects can affect large areas of your lawn and you may not know it until a considerable amount of damage has occurred. Some signs of grubs and/or sod web worms could be lots of mole activity or lots of birds appearing to feed off your lawn. The best way to check for grubs and/or sod web worms is to dig small holes in several areas of your lawn to see if grubs are present. If they are, an insecticide should be applied.

You may choose to get on a fertilizing program with a fertilizing company. If you do, be sure to inform them that you have a newly seeded lawn and that you do not want selective herbicides (weed killers) or pre-emergent products applied until the lawn is fully established.

            Turf may be injured or die out if too much fertilizer is applied. Care should be taken not to over apply or spill fertilizer when fertilizing. If your fertilizer application is within 10 to 15 percent either way of the manufactures recommended application rate, you should be okay.