Try to plant in a location that enjoys full sun and remember to apply water fairly sparingly. Porzellan is generally regarded as a hardy plant, so it can be safe to leave outdoors for the majority of winter (although if in doubt, using a row cover is often a good idea). Porzellan needs a loamy and clay soil with a ph of 6.0 to 8.0 (weakly acidic soil to weakly alkaline soil).
Growing Porzellan from seed
By our calculations, you should look at sowing Porzellan about 84 days before your last frost date.
Transplanting Porzellan
Porzellan is hardy, so ensure you wait until all danger of frost has passed in your area before considering planting outside.