The key to successfully growing Paphiopedilum callosum is to keep them in conditions that resemble their natural culture: indirect light, a bark based growing medium, light fertilisation and appropriate watering (water thoroughly then let it dry out every 5-7 days).
On a young plant that is flowering for the first time, is recommended to let the flower on for short period and then cut it off. It will keep in a vase for a while and the young plant will grow much better without having to support a bloom. If it is intended to put a seed-pod on Paphiopedilum callosum, chose a strong plant which will be able to hold the pod for the required ten months (this time period applies to Paphiopedilum seed pods). It is an enormous strain on any orchid to grow seeds and only a strong plant will survive.
When cut the Paphiopedilum callosum flower and keep it in a vase, cut the stem flower as long as possible and make a 45° angle cut to increase the water absorption surface. Change the vase water daily and keep cutting a centimetre (0.4 inch) or so every day to avoid sealing the cut and allow the flower to take the needed water to stay fresh. Keep the vase in a relatively cool room (around 21°C – 70°F) to increase the flower lifespan.