Ice Plant Flower Germination:
(Seeds are pelleted. Pelleted seeds are seeds coated in organic clay, making them easier to handle, plant, and space correctly and almost completely eliminating the need for thinning. As a result, you waste less seed and save time! The clay also acts as a tiny moisture insulator, keeping the seed from drying out for a bit longer.)
1) Fill treys with a sterile seed starting mix that's well draining, and keep moist, not wet.
2) Lightly press the 3-5 seeds to each trey cell. Slightly press into the topsoil being sure "not to cover them completely", as they need light to germinate. 
3) Use a grow lamp to keep light over them, and use a heated propagator mat to keep the soil temperature at 75 degrees F.
4) Keep moist, but never wet.
5) Expect germination within 15-30 days.