Verbenaseedgermination requires darkness. You can simply dust some soil over the seeds or cover the flat with black plastic. sowing verbenaseeds. Sprinkle the seed on the surface of fine compost. Before covering the seed check the instructions on the packet as some need light to germinate and some do not. Verbenaseeds can take 20 to 40 days to germinate depending on the variety. When soil temperature reaches 65-75ºF, the seeds will awaken from their dormancy and start sprouting. The seeds of verbena bonariensis can be down after danger of frost has passed in spring. Press seed into the soil and lightly cover. Keep moist until germination occurs. VerbenaSeedGermination Guide. Germinatingverbena from seed can be a rewarding experience, but it does require some patience and attention to detail. Soil moisture is important when germinatingverbenaseeds. Soil should be slightly moist to almost dry. Press seeds into soil and lightly cover. Darkness will aid germination. Verbena is well propagated by seeds, but some of its species have the seeds covered with a very dense coating that complicates the process of seedgermination. Verbenaseeds take 14-21 days to germinate. Transplant verbenaseedlings to an individual pot when seedlings are a few cm tall. Verbenaseedgermination requires darkness. Sow seeds just as you would indoor plants. Once germination takes place, remove black plastic if applicable. Most seedsgerminate faster at warm tempera. tures (65-75°F). Once they are up, they can be. cooled or "hardened" at 50-55°F and held until transplanting.
