1 And always wash your hands after working with the product. 2  Avoid using pressure-treated lumber where it may come into contact with drinking water or food (such as cutting boards or for use in beehives).  Do not use treated wood for animal food storage bins, water trough, and compost bins.
Comments. Submit. Canna seeds germinate in about one week. When you plant rhizomes in the ground at an average depth of 2 to 3 inches, canna seeds sprout within a few days to a few weeks.The key determinants are heat, moisture and soil conditions, along with rhizome species, size and quality.hen you plant rhizomes in the ground at an average depth of 2 to 3 inches, canna seeds sprout within a few days to a few weeks.
Germination for aster seeds. Germination for aster seeds is generally 7 to 14 days, depending on the type. Days to maturity should be on the packet--some types are 75 to 80 days. They often have a nice long bloom duration, perhaps 4 to 6 weeks if you deadhead and take care of them.sters can be propagated by division or by planting seed in the spring. If your cut flowers had gone to seed you can save the seeds. Best time to divide an aster plant is in the spring. Cut a mature plant into 3 to 4 sections and plant each section in the garden.