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.
How long does a plant take to grow? Depends on entirely on the type of plant; annuals will go from seed  to flower in anything between 8 and 12 weeks.    Pernnial plants can literally take a lifetime bef â¦ ore they flower -  some up to 80 years from the time they germinate.   For me it took about 1 or 2 weeks to get a big sprout. Maybe to be fully grown is like 1 month and if your lucky, probably less than a month. Just make sure it ge â¦ ts sun & water. And you don't even need soil to grow u can use dirt.