growing strong seedlings
During the first few weeks, use a full-spectrum
fertilizer that includes trace elements such as iron,
copper, manganese and zinc. The trace metals are
cofactors that actually turn on enzymes used for photosynthesis and cellular metabolism. Also, make sure the pH
is kept in the slightly acidic range, somewhere between
5.8 and 6.4. If the pH rises much past 6.5, iron starts to
become unavailable to the plant. Iron is a catalyst for the
formation of chlorophyll, essential for photosynthesis.
If the pH rises above 7.5, all of the metal catalysts start
to become unavailable and can slow down new growth.
Zinc, for example, activates the enzymes necessary for
indole-3-acetic acid (IAA) production—the growth
hormone responsible for initiating root production.
Adequate phosphorus is also important for faster root
strike and better establishment of the plant. Phosphorus
is the energy element. It energizes the rooting process,
and extra phosphorus is included in most commercial
starter fertilizers. With just a little extra phosphorus, it is
possible to see as much as 20% more roots.
Seedlings don’t need
much light intensity. Two
standard fluorescent
lamps over a nursery
tray are adequate, but
many gardeners, including
myself, prefer four lamps.”
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Maximum Yield USA | April 2015