Well, I think this idea of CO2 may be of particular use to me. I have read that orchids are like cacti, and only open their stomata at night. Whereas I have plenty of air exchange during the day from my cooler running all year, even in freezing weather with some debilitation, I have NO air exchange at night. This might not be a problem in a normally populated greenhouse (GH), but I am running a temporary green house, 8' X 12' made short because of high wind loads on such a flimsy structure, and it has been going much longer than expected, so it is grossly over crowed at this point. About 750 plants, not counting duplicates, or those that move to the cold frame sometime during winter, with plants growing in 3 levels. To make maters worse, I baffle the two louver vents near the top of the GH so that the escaping hot air has to travel down to ground level before it is exhausted, and this stops the temperature differential from forcing hot air out the vents, shutting off air exchange there. Only problem may be getting dry ice in Prescott, AZ. Anyone try using bottled CO2?
> Dr. Charles E. Bracker wrote > >>For the supplemental CO2 to benefit the orchids, four factors must come >>together: > >>1. Closed environment >>2. Large number of plants for the space included >>3. Proper frequency of application of the CO2 (Determined by trial and >>error) > 4.> Proper amount of CO2 applied each time (Also determined by trial and >>error) > >>For Tom Hillson and others, I hope your experience is half as successful >>as >>mine has been. > >>Good luck with whatever method you choose. > > Hi Charles > > I have wondered about using CO2 for some time now and I can see how this > method should work well. > I would be interested to know the cubic capacity of the rooms your orchids > are housed in and some idea > of the size of the dry ice you use. (by cubic measure or weight?) > > Thanks for a great idea. > > Tony > > _______________________________________________ the OrchidGuide Digest (OGD) [email protected] http://orchidguide.com/mailman/listinfo/orchids_orchidguide.com
