You can pick the smallest you have because this plant grows slowly and doesn’t develop a deep root. It’s obligatory to puncture holes at the bottom of the container so that the excess of water can leave the container. First, put the pebbles in the container, and then use the substrate for the next layer. The substrate should be mixed with pebbles (use can use perlite instead of pebbles, pieces of brick or anything that can ensure good drainage). Top it all with a layer of coarse sand. Put the seed into the container and gently tap it with a flat object. It’s not necessary to additionally cover the seeds. Put the container with seeds into another dish with water that you had boiled beforehand and let to cool down (you can use rainwater instead of boiled water or tap water that’s a couple of days old). Wait for a few minutes for the substrate to dampen and then take the container with seeds out of the water and leave for the excess of water to drain completely. Keep the moisture inside the container by covering it with a transparent piece of glass, foil, bag or something similar. You don’t need to provide any temperature for the germination process to occur, because this is a plant that’s active during winter so it’s for the best if the planting process occurs during winter. Leave the container at room temperature, but as far as possible from the heat source. The seeds will begin to germinate in 10 days to 1 month. When most of them germinate, remove the glass that you used to keep the plant moist. In the beginning, this plant will have a very slow growth pace. It will need around 2 years to get to about an inch (2cm) in height. It speeds up its growth process afterward.