Our handbook "Orchids in the San Joaquin Valley" compiled by Richard Buchter, is tailored to growing orchids in Central California climate.  It is in no way intended to take the place of the many excellent books written by authorities on the botanical peculiarities and cultural requirements of the Orchidaceae.  This handbook contains information which both the new and the experienced grower may find useful.  The orchid culture recommendations are offered as simple and generally applicable practices for use in the San Joaquin Valley.       

                                              
The following information has been extracted from "Orchids in the San Joaquin Valley".

January in the Greenhouse

Watch moisture levels in the greenhouse carefully, especially on cold overcast days.  Increase air movement to help reduce moisture on plants.

Cattleyas:  Moderate temperatures to prevent premature shoots.  Do not allow potting mix to dry out.  Keep plantsi n bud more moist than others.

Paphiopedilum:  Reduce moisture slightly.  Be very careful to keep water out of axils, as developing buds will rot otherwise.  Do not reposition plants after buds emerge from axils. 

Cymbidium:  Keep moderately moist but not wet.  Keep plants in bud cool, otherwise buds may yellow and drop (bud blast).

Phalaenopsis:  No resting period.  Maintain temperatures and do not allow potting mix to dry out.  Bud development requires strong, diffused light to prevent yellowing.  Keep water off buds.  Stake and tie spikes.

Dendrobium:  Strict resting period.  Ensure sufficient humidity.  Control mites now.

Oncidium/Odontoglossum:  Hard bulbed types need very little water.


Housekeeping Tasks

1.  Control algae on inside greenhosue surfaces with Physan or 10% bleach solution.

2.  Check plant labels for completeness and accuracy.

3.  Ensure thermostats are functioning properly.