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.
Growth Time. Caladium plants reach full size, up to 3 feet tall, in one season. The size of the plant and the leaves depend on the size of the tuber. Seeds take one to three months to germinate before the plant begins to grow. Grown from tubers, leaves usually emerge within three to four weeks.Caladiums do not begin to grow until the soil temperature reaches 70 F, so cooler soil will mean a longer wait for the plants to emerge.rowth Time. Caladium plants reach full size, up to 3 feet tall, in one season. The size of the plant and the leaves depend on the size of the tuber. Seeds take one to three months to germinate before the plant begins to grow. Grown from tubers, leaves usually emerge within three to four weeks.