| I think the reason for your success is that the white does not block as much light and you are growing under higher light levels.
I also find that in constructing a green house and its larger collection, you become more regular in watering and fertilizer. All good things.
I mostly wanted to add some research going on in Florida with growing under red or blue covers. Apparently, Orchids do not see any other colors. Using red or blue allows you to increase the light level reaching the orchids without burning. It will be a year or two before results are known, but it is interesting. My next shadehouse is planned to be red.
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jerry  |