Quote:
Originally Posted by K-Sci
What is a high light plant? Full sun? I'm not sure Cattleyas would fall into that category. Maybe some vandas do. In some of the Jerry's Grow ads, cattleyas were pictured (but how do we know the grower wasn't spectacular even without it?).
-Keith
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Vandas, for sure, but - once again - there is a gradient, not "steps" between what is a "high light" plant and what isn't.
I was giving this some more thought (hot water on head in shower) and it struck me that, generally speaking, plants will grow as well as they can, as long as each and every requirement, including individual nutritional elements, is adequately provided.
That's why a slight insufficiency in a nutrient doesn't necessarily result in a "deficiency symptom", but is more likely to manifest itself in slower growth, smaller plants, less flowering, etc.
I suspect that in an "average, intermediately-light orchid", having the relatively slow growth rate that they do, simply cannot take advantage of the added carbon (I'm assuming that theory is correct, for the purposes of the discussion), and that the plant that can tolerate higher light wouldn't be able to take advantage of it unless
everything else is appropriately supplied to allow the entire system to up its game.
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