Propagation
To better utilize space during the propagation stage, light carts
are sometimes used. Light carts make it possible to stack several
trays of seedlings in a very small space. Most light carts use fluorescent
grow lamps instead of HID's. Many fluorescent "grow lamps" have
a balanced color spectrum, closely approximating natural sunlight,
but their low lumen output make them impractical for growing plants
with high light requirements.
Fluorescent lighting is excellent for rooting cuttings, since tender
young cuttings and seedlings do not need as much intense light as
more mature plants. Even so, the lamps should be kept as close to
the young plants as possible, preferably within a few inches.
Wide spectrum fluorescents are recommended, cool white fluorescents
can also be used if necessary. Their strong blue light is good for
initial growth, but their lack of illumination, particularly in
the red part of the spectrum, slows down root development by a few
days.
For gardeners on a budget, using a fixture with one standard fluorescent
bulb and one wide spectrum fluorescent bulb may be a good compromise.
