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When To Plant Wildflowers
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The optimum rainfall period, severity of the winter and dormancy of the seed will determine the most favorable time to plant wildflowers in your area.
Annual wildflowers must be planted in the spring or as a dormant seeding in late fall. These plants need to reseed for growth the following year. Planting too late in spring or in summer will not allow enough time for these plants to mature and develop viable seeds.
Biennials can be planted in spring, late summer or late fall dormant seedings, as they need to grow, go dormant and then bloom the following year.
Perennials can be planted in the spring or as a late fall dormant seeding. Dormant seeding offers natural stratification of seeds in the soil over winter months for better germination in the spring, but early spring weeds may develop before germination. A late spring planting with pre-seeding weed control will give better results and less long-term management.
STOCK SEED FARMS recommends that wildflowers be planted at the same time as the prairiegrasses. Interseeding into established prairiegrass can give inconsistent results. However, with the right equipment and timing, planting into established stands may be accomplished under the following conditions: established stands need to be thin enough to allow for new growth; plantings should be made early in spring, before grasses break dormancy and after old growth is removed (burning or shreading); use a drill -- preferably no-till -- to do interseeding.
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