All of my cymbidiums are grown outdoors. They are under 55% shade cloth with direct sunlight all day.
All of my cymbidiums are watered once a week or every other week during the winter, depending on the level of moisture in the air. During the growing season (spring and summer), I generally water a minimum of once a week, and sometimes up to 2-3 times a week when the temperatures get above 80 degrees. During hot and/or windy weather (especially when the Santa Ana winds are blowing), the plants tend to dry out much quicker and require watering every other day or even daily for the smaller pots.
All of my cymbidiums are watered by hand to ensure proper leeching. This helps wash accumulated salt out of the pots preventing leaf tip burn. I use Reverse Osmosis water supplemented with a low dose of fertilizer for all of my plants that require low salinity, mainly my devonianums and devonianum hybrids.
All of my cymbidiums (except for the devonianums) are fertilized with Nutricote 13-13-13 (9 month slow release applied once yearly – February) and supplemented with liquid fertilizer Grow More (30-10-10) during the growing season (February thru August). I also top dress the plants with dolomite lime and gypsum which helps control the ph of the mix. The devonianums are fertilized with a 1/10 dose of Grow More 30-10-10 during the non-winter months only.
Coconut Husk Based Mix for Cymbidium Orchids
I use a mixture of medium and small size coconut chips with an addition of about 10% perlite #3. The plants have been growing extremely well from 3 inch pots all the way to 2 gallon pots. Dolomite Lime and Gypsum are also added during repotting.
Seedlings just out of flask are planted in 4 inch community pots (10 plants per pot) with the same mix as above. In the past I have tried cell trays with different medias, and all tend to dry out to quickly in my growing conditions. The community pots provide a much more successful option for me, with a much larger success rate in a shorter period of time.