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.
Iâm germinating a plug flat right now. The first seeds germinated in 7 days. At 21 days seeds are still coming up. It can take as long as 6 weeks or more for all of the seeds to come up. The minimum germination standard is 60%. Most varieties will germinate at 80+% and higher. I prechill the seeds in a refrigerator prior to shipping. Itâs best to store them in a refrigerator if there will be a delay in sowing. They should be frozen for 3-4 weeks as mentioned above before seeding.