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to retain moisture in the top 1 to 3 inches of soil and prevents <br /> excessive seeding depths. <br /> SEEDING TIME: The seeding time with the greatest success is a <br /> dormant seeding for areas that cannot be irrigated. A dormant <br /> seeding is defined as when the soil temperature is cool enough to <br /> prevent seed germination until the following spring. Grass seed <br /> starts germinating when the soil temperature reaches 40 to 42 <br /> degrees F. The dormant seeding benefits from snowfall as well as <br /> early spring rains and has the opportunity to become established <br /> much earlier in the spring than spring seeding. <br /> Spring can be successful if rainfall is above the historical <br /> average. Historical weather data shows that the rainfall pattern <br /> is fairly minimal through the spring months with June being hot and <br /> dry. In most cases, very early spring seedings (March) are <br /> difficult due to snow cover or wet conditions which prevents proper <br /> seedbed preparation. If seeded in late spring, the seedlings <br /> generally cannot become established adequately to withstand the <br /> historically hot/dry month of June. <br /> Late summer seedings (late July to mid August) have shown success <br /> in some areas since August and September have historically been the <br /> highest rainfall months. However, in other areas the late summer <br /> seeding date has been marginal with regards to successful plant <br /> establishment. In addition (depending on location) , a freeze is <br /> highly possible starting by mid September and could severely injure <br /> or kill young seedlings before they become well established. <br /> Therefore, spring and late summer grass seedings are times that are <br /> exposed to the greatest risks for adequate grass stand <br /> establishment when supplemental water is not available. Dormant <br /> grass seedings after the soil temperature has dropped and remains <br /> below 40 degrees F has provided the most consistent results to <br /> date. <br /> Suggested seeding times (without irrigation) based on Maior Land <br /> Resource Area (MLRA) . The MLRA designation is identified on the <br /> attached map. <br /> MLRA 35 '(generally less than 6000 ft elevation) <br /> Dormant Season - November 1-30 <br /> Spring Seeding - not recommended <br /> Late Summer Seeding - not recommended <br /> MLRA 34B (6000-7500 ft elevation) <br /> Dormant Season - October 15 - November 15 <br /> Spring Seeding (marginal) - April 1-30 <br /> Late Summer Seeding - August 15 - September 1 <br /> MLRA 48A&B (7500-9500 ft elevation) <br /> Dormant Season - September 15 - October 15 <br /> Spring Seeding - not recommended <br /> Late Summer - August 1-31 <br />