In a message dated 7/31/2007 1:45:59 PM Mountain Daylight Time,
I am afraid that
seeds in a glass container may have a hard time figuring out up from
down. I think that depends on light, light being up and dark being
down. If I am mistaken about this, someone let me know.
In my experience, the most important factor is gravity. I found that
even seeds that sprouted in the refrigerator's dark vegetable drawer would send
their leaves up and roots down if they had not been tumbled. In contrast,
any setup that allowed the seeds to change orientation could lead to misshappen
seedlings. This is one reason I came to prefer perlite. It not only
controls the moisture but holds the seeds in place and makes it easy to
reposition them properly after inspection.
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