Saturday, January 10, 2009

Greenhouse microclimates

I am asked “How do you create microclimates within your greenhouse?” The answer is that it would be difficult NOT to have microclimates in my greenhouse.

The variables in a microclimate are light, temperature, amount of water and humidity.

Light is controlled by east-west location and shade cloth. The greenhouse is on the west side of the house and the sun shines on the west end of the greenhouse roof the longest. In addition, there are some areas that have a piece of 50% shade cloth. Sometimes when I want to reduce light on a hanging plant I simply turn it to face east.

Temperature is varied because the heater is in the southeast corner and the big fans are in the northeast and northwest corners with the thermostat in between the fans on the north wall. The east side is warmer than the west side.

The east end is the dry end. There is no watering at all except by hand. The west 3/4 of the greenhouse is on an automatic timer that rains on the plants. This is daily in summer down to once a week in winter.

The middle half also has foggers. These come on if the temperature is above 90 degrees or above 80 if the humidity is low. This area is extremely wet in hot weather.

I use thermometers and a light meter to locate microclimates. Then I try to place plants in the appropriate place.

1 comment:

  1. Hey Richard, thanks for the blog. I'm trying to figure out how to create microclimates in microplaces. ;)

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