Quote:
Originally Posted by lisaxaphona
So I think I'll do some research,...
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I went back and read all the threads on the search I suggested. The most readily-available products seem to be liquid Super-Thrive, which is extremely expensive, liquid KLN and various liquid kelp extract products. All these can be diluted in water so they are easier to apply to orchid roots.
I can't see how extra vitamin B1 would do anything for plants. Plants make it themselves. I'm not the only one who thinks this way.
Backyard Gardener - Vitamin B-1 and Root Stimulators - March 26, 2008
So for years it's been my opinion SuperThrive is just a very expensive scam. I know people who think it works.
A lot of people on this forum use kelp products as periodic treatments to stimulate root growth, especially after transplanting. I bought some KelpMax from First Ray's; the proprietor posts to this forum. You can read more about it on his site, and there is a lot of information on the Internet about various kelp extracts.
My conditions are poor for Vanda and I've killed adult plants before - quickly. My past experience has been Vanda don't make new roots if the ambient humidity is low. I used the kelp extract as a drench on some Vanda seedlings according to directions. I soaked them on arrival and then once per month with the kelp solution. After two months and three treatments, some have begun making new roots and some have not. They all look healthy and are growing leaves.
I don't know whether the product worked or not: I did not use a control group that didn't get the treatment, so it is impossible to attribute anything to the treatment. And had I done so, I wouldn't have a large enough number of plants to draw any statistically valid conclusions.
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