Dendrobium biggibum can be moderately challenging to grow in the southern states of Australia. If you had asked several years ago if we could grow this species or its hybrids to acceptable exhibition level, the answer would have simply been no. However, in recent years we have made some discoveries about how to grow these plants quite well.
Firstly we changed the potting media nursery wide from 70% pine bark, 15% river gravel and 15% coarse perlite to 80% pine bark and 20% 10mm scoria. This media drained faster and this subsequently aided in superior root growth. As a result new growths the following season were visibly more robust. Watering has been dramatically in the cooler months. This not only maintains root quality but probably assists in better flowering also. Previously we had grown these plants in an enclosed hot house, at a constant temperature of 18 degrees Celsius. We invested in a heat mat from our local electrical supplier and covered this with river sand to encourage a high level of consistent humidity throughout all seasons. The thermostat is currently set at 15 degrees Celsius and