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.
Plant a lot of seeds to increase your chances. Average time to germination: 4 weeks to 6 weeks. (Depending on variety and conditions). But, I'll know first hand in probably a week when I get my own seeds and start the journey of tryng to germinate my own seeds.hese seeds take a very long time to germinate and grow under normal conditions. Please be patient with them and give them up to 2 months to germinate. Lightly water only when the soil is dry and give them some sunlight.