Very nice collection of 4 different Hoya species in container. The picture you see is an example. You will receive plants of around 10 cm. I will pick the species depending on stock.They are not yet of flowering age. Hoyas prefer a soil mix similar to Orchids and Epiphyllums. Use a combination of 50% peat, 25% potting soil and 25% coarse sand. Add some bark to loosen up the soil structure further. Hoya plants need a minimum temperature of around 18 °C.