Can I grow cymbidium orchards in a raised garden rather than pots and will they bloom?

Cymbidium orchids are semi-terrestrial plants, meaning in their natural habitat they grow in light soil that contains ingredients such as fir bark, peat moss and perlite or pumice. So if you were to plant your cymbidiums in a raised bed, it would have to contain light soil that includes such ingredients. Also, many people enjoy bringing the plants in for display during the winter when they bloom, which is impossible if you have them growing in a raised bed. So, though it is possible to grow them in raised beds, it is important to realize that they have special growing conditions that may not jive with other plants you wish to plant in the raised bed. For that reason, it is often easier and more satisfying to grow them in their own containers with just the right soil mix.

Thank you for your quick response. I intend to have them in their own planting mix (they have lived outdoors for many years) but will they still bloom if they are not root bound?

Cymbidiums like to be slightly root bound, so when repotting stay in the same size pot or just one pot size up. Your main reason for repotting will be to replace worn out planting medium--for instance, bark tends to break down over time.