growing question

[fisx]

Crowding your Cattleya seedlings is not the problem. The reason that I would caution you against putting all your recently acquired plants into one pot is that no matter which they are - species or hybrids - they will NOT have the same cultural requirements. This will lead to all manor of difficulties and the eventual loss of at a minimum some of your orchids. Even within the genus Cattleyas have significantly different requirements in terms of max and minimum temps, rest periods, light levels and potting mediums just to name a few. You will be much better off doing some investigation into each plants needs and potting each one in a separate container.