For lemon balm soak overnight in water and cover lightly with soil. I don't know about crepe myrtle. I soak lantana seeds in water overnight, rub off the black "fruit" and plant the seed about 1/2 under the soil, keep warm. Transplant lantana and lemon balm to the garden when big enough to handle or they can be direct sown (lemon balm can be invasive). For bottlebrush just sprinkle on moist soil, put the pot in a baggie to retain moisture and put somewhere warm, out of direct sun. Once the seeds sprout open the baggie and slowly adjust the seedlings to less humidity. The seedlings are quite tiny. Once they are big enough to handle transplant to individual containers. Lantana and lemon balm seedlings are much bigger then bottlebrush seedlings.