Answer: The seeds of Ulmus parvifoliar ripen immediately and are normally planted as soon as they're collected in the spring. If you allow the seeds to dry completely, germination rates will be reduced. Sow seeds in moist sand or peatmoss. They'll germinate faster if you can keep the daytime temperatures about 85F and the nighttime temperatures about 68F degrees. You can expect germination in 10 to 30 days; viability rates from commercially harvested seed is only 12%, so plant as many seeds as you can collect!
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