Growing Water Lily Seeds

I went online and bought some Hardy Water Lily seeds.
The colors are

• Pink
• Hot Pink
• Sensation Pink
• Blue
• Yellow
• White

I'm trying to grow them in a rather unconventional method.
I'm using one of my 12 compartment seed trays. I filled each compartment halfway with gardening soil. Then I slowly flooded the compartment with rainwater. I let the soil settle overnight.
I grew 2 seeds of each color, one seed in each compartment. According to the person who I bought the seeds from, it should take 3 to 4 weeks for the seeds to sprout. Since this method is not your typical method it may or may not work but if it does, it is easier for me. We'll see how things go 3 to 4 weeks from now.