Are the deadnettle seeds of the plant true seeds that can be used to start new plants? Thank you.
Generally, yes. Stratify the seeds by placing them ½ inch deep in a small pot filled with moist sand. Place the pot in an area having between 65 and 70 degrees F. for at least 4 weeks, keeping the pot moist. At the 4-week mark, move the pot to the refrigerator for another 4-week period, again keeping it moist. After this period, you can place the pot in an area with cool temps (40-55 F) in bright, indirect sunlight. SEeds should then germinate with one to two months.
Of course, you also have the option skipping the stratification process by simply direct planting them outdoors in fall where they will germinate sometime in spring.