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The advantages of hydroseeding are numerous‚ however it is not a magic potion. The layer of nutrients and seed that you now see sitting on top of your prepared soil are incomplete. The one element missing from this equation is water. To start the germination process‚ grass seed needs a lot of water. If the seed gets dry‚ the germination process will stop and the seed will wait until conditions are right for it to start again. Your mission for the next few weeks is to keep those seeds moist at all times.

The rule of thumb when establishing a watering schedule is‚ "Wet without puddles". The amount of water your seed needs will depend on the weather conditions of the season or of the particular day. For example‚ a hot and windy day will require much more frequent watering (5 times) than an overcast day with cooler temperatures (3 times). If you must miss a watering‚ try not to miss the evening time. Evaporation rates drop tremendously during the night‚ and the seed will stay moist with much less effort during this time period.

Watering Large Areas

In most cases‚ larger areas are very difficult to water adequately. The hydroseeding process requires 4000 L/acre‚ and each watering will probably require an equal amount. In situations where this is an impossibility‚ it is important to also change ones expectations.

The grass seed will remain safe in the hydroseed for a period of 6–12 months. During this time‚ you will adopt an agrarian ethos and pray for rain.

Your crop may also require some overseeding in certain areas in years following. Hydroseeding will still give your area the best chance it can possibly have but it needs that nectar from heaven.

Germination Rates in a typical Seed Mixture

You will see the ryegrass coming up first‚ as you can see in the chart. It will be tempting to slow down with watering at this point. The ryegrass in the mix is a nurse plant. It will provide shade and add protection for the more important seed varieties during the first year. To quit watering now would stop the process for the other 80% of your seed. Try to keep the area moist until all of the seed has germinated.


It is always a good idea to overseed your lawn in the early spring or late fall. This practice makes your lawn thick‚ squeezing out weeds. It also regenerates the lawn by providing new plants. A grass plant has a life span‚ and will need to be replaced eventually. We can supply an overseed mix to match your lawn.


Watering will cause the fertilizer in your hydroseed to leach down through the soil. It's doing what it was designed to do. Once the fertilizer is gone‚ you will need to continue supplying nutrients to the seed and/or plants.

To encourage new growth‚ we have applied a fertilizer high in phosphorus. You should be able to see the grains of fertilizer on the ground‚ so if you cannot find any‚ it’s time to reapply.

If you still have seed that has not sprouted when the fertilizer is gone‚ you will want to reapply a similar fertilizer (11–52–0).

To encourage growth in existing plants‚ a general lawn fertilizer should be used.

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Weed seeds are everywhere. In the soil‚ in the air‚ they have almost always been there–before we have. There is a good chance that weeds will grow very vigorously alongside your new grass – after all‚ hydroseeding has supplied the perfect environment for them too. There’s not much you can do about them for the first 8–12 weeks. The best thing to do for the weeds at the start is to mow them to 3" length so that they do not go to seed. The weeds can actually be a positive to the germination process‚ creating shade and moist biomass when they are mowed. Once your lawn is mature‚ you can use a broadleaf herbicide or start pulling...

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