website stat Surprises from plant biology
Surprises from plant biology
DrJSmith (TOTAL POSTS:1) 3/25/2013 1:13:58 AM


February article, 2013


The famous biologist,Theodosius Dobzhansky said, "Nothing in biology makes sense except in light of evolution." What he meant was that even though sometimes living things exhibit crazy behavior, like birds performing ridiculous mating dances, cacti growing tons of prickly thorns, or poison dart frogs producing absurdly toxic chemicals, all have an evolutionary explanation

Just when one might think that they know a lot about plants, plants have a few tricks up their s(leaves).  One experience that I had with an orchid plant I had enjoyed while flowering.  However trying to induce new flowers to form was very unsuccessful.  Over the year, I had tried different fertilizers, different water schedules, and different light from different window sills as well as varying artificial lights. In January and in complete frustration, I placed it outside close to the trash barrel and forgot about it.  In April I happened to noticed that the plant was still there and was astonished to see it was covered with new floral stems.  Who would have guessed that a ‘tropical’ plant needed a cold shock to get moving on a floral cycle once again? I later learned that the point of origin for this type of orchid is at a high altitude of the Andes.  Since then when growing orchids plants that are difficult to flower, I have found adding ice cubes to the pot for 6 to 8 weeks before giving indirect lighting brings them into flower on schedule.

Fortunately, the control of flowering in marijuana is more thoroughly understood.   After germination, a vegetative growth period of 4 to 8 weeks (12 to 16 hours of light in a 24h period), flowering is induced by switching the plant to short days (8 hours or less of light in a 24h period).  This reduced light period must be maintained until flowering has completed.  If the short days are interrupted with too much light, the vegetative growth will resume..

Dr. Smith

Beverly (TOTAL POSTS:20) 4/4/2013 2:40:34 PM

Every plant on earth has it`s own growth/reproductive cycle and when followed precisely, very good results should occur.  As you mentioned, it helps knowing the origin of a plant (such as the natural conditions that a plant would face in it`s native home) in order to provide a similar growth environment. 
aaaa (TOTAL POSTS:2) 4/13/2013 9:46:59 AM

Relly great stuff....
Thanks Dr. Smith
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