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High germination rates are the pride of any Hydrograssing contractor. But often, the factors of time and terrain?EUR??,,????'?????<??oeand the pressures of schedule and profitability?EUR??,,????'?????<??oewill prohibit the better choices and higher germination rates of traditional multi-step methods for seeding and soil stabilization. For jobs where these (and other) operational limits may apply, the One Step Method (1SM) rides to the rescue.
As its name implies, the 1SM mixes and shoots all of the job?EUR??,,????'?????<???EUR?s hydrograssing components at once: charge the tank with water, add fertilizer, mulch, tackifier, and then add your seed. Shoot. Repeat as necessary. However, because so much seed remains suspended in the mulch and doesn?EUR??,,????'?????<???EUR?t make contact with the soil, one can expect decent, but not great, germination rates. Savvy contractors know especially that if follow-on moisture availability is poor, [and] the terrain?EUR??,,????'?????<???EUR?s not level, using the 1SM is risky almost to the point of no benefit. Where flat terrain predominates and follow-on moisture is good, and with some additional effort, a modification to the basic 1SM can yield higher germination and productivity.
Enter the Modified One Step Method (1SMM). With the 1SMM, initial batching is limited to water, fertilizer and seed, with a trace amount of fibermulch for enhancing visual feedback of the coverage. Mixing these components into a slurry this way maximizes their use in the given capacity of the machine, and broadcasting happens over a larger area more quickly. The modification to the 1SM is in the secondary and subsequent batches of fibermulch and tackifier only, that layer over the first application of water, fertilizer and seed. The secondary, layered introduction of mulch and tackifier minimizes the opportunity for seed soil disturbance, a condition easily generated, or aggravated, by the slurry mass of 1SM applications.
Not every 1SM job can be ?EUR??,,????'?????<?upgraded?EUR??,,????'?????<???EUR? to a 1SMM job, but where possible to do so, these benefits are immediately available:
1) Seed and fertilizer are batched to maximum machine capacity.
2) Broadcasting happens over a larger area more quickly.
3) Layered application approach minimizes seedbed and soil disturbance.
3) Layered mulch and tack overspray reduces the opportunity for slumping during application.
4) Overspraying disperses water requirements over a larger area, reducing the formation of puddles and rilles.
For a more detailed discussion of single and multi-step seeding methods, download a free copy of Reinco?EUR??,,????'?????<???EUR?s Guide to Methods & Cost Analysis at: www.reinco.com/Docs/CA_2000.pdf
Francisco Uviña, University of New Mexico
Hardscape Oasis in Litchfield Park
Ash Nochian, Ph.D. Landscape Architect
November 12th, 2025
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