CANNA LILLY PROPAGATION : PLACE SEEDS IN WARM WATER 24 HRS,
after 24 hrs what should the appearance of the seed look like? How do you know it's ready for germination?
Certified GKH Gardening Expert
It will have soaked up the necessary water for initiation by the 24 hour mark. It is a general guideline, and will only ensure that the seeds have soaked up enough water to begin its lifecycle.
After soaking, you can proceed as usual. Many seeds benefit from soaking, and this method can be applied to just about any seed to speed up the germination process.
This article will help you to grow these after they germinate: https://www.gardeningknowhow.com/ornamental/bulbs/canna/canna-lily-care.htm