must be diluted before use. Horticulturists should pay
close attention to the manufacturer’s recommended
dilution rates for the various uses of the product. In
other words, the recommended concentration for
cleaning the greenhouse material will differ from the
concentration for a soil drench.
Preparing the Plants for Overwintering
Before bringing outside plants into the green-
house for the winter, a gardener should take a few
steps to make the transition smoother. Start with
cleaning the plants themselves by removing any dead
or dying leaves from the plant and soil container.
Examine the plants closely for pest insects. Any pest
insect issues should be treated before bringing those
plants into the greenhouse. If possible, time your wa-
tering so that the plants can receive a watering with
the Physan 20 mixture right before entering the green-
house for the winter. As previously mentioned, this
will kill any fungi, algae, bacteria, or viruses that may
be contained in the soil.
Plant Placement
Plant placement is another important factor to
consider when overwintering. Some plants are more
sensitive to cold than others. The plants that will bet-
ter handle cold conditions should be placed along the
perimeter of the greenhouse and those more sensitive
to the cold should be place closer to the center. If the
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November 2017